June 21, 2010 at Korakuen Hall, Mammoth Sasaki would make his return to the ring for the first time in 16 months as well as his FREEDOMS debut against rival and former partner Daisuke Sekimoto. Mammoth and Sekimoto would start the match by running right into each other with powerful clotheslines as soon as the start of the match. They would begin chopping each other hard across the chest with Mammoth then delivering a clothesline to knock Sekimoto out of the ring. Mammoth would go to the outside and hit a flying clothesline off the apron as the chants crowd would chant loudly for Mammoth. Kamui would be by Mammoth Sasaki's corner and Ricky Fuji would eventually join in screaming for Mammoth. Mammoth and Sekimoto would exchange clotheslines and chops to one another as Mammoth would eventually try for the 29 Years Old but Sekimoto would manage to slide away and place Mammoth in the Torture Rack with Mammoth managing to escape. Sekimoto would go up to the top rope and hit a frog splash but as the referee would go to cover Mammoth would manage to pick up Sekimoto during the count and hit the 29 Years Old but Mammoth would be unable to put away Sekimoto with that. Sekimoto would end up finishing the match as he would end up hitting Mammoth with a German Suplex and although Mammoth would manage to kick out of it once, he would be unable to kick out of it the second German Suplex as Sekimoto would get the pinfall victory over the returning Mammoth Sasaki. Sekimoto would end up grabbing the mic to tell Mammoth "Welcome Back" as the FREEDOMS were very vocal while cheering for Mammoth during and after the match as Mammoth was now back. 

July 11, 2010 at the Yokohama Nigizawa, Mammoth would make his return to Big Japan, but it would be at a D-Dash show which is designed for their younger workers to show what they have. Mammoth would have to show that he was fully back as he would take on Atsushi Ohashi as Mammoth would end up finishing off Ohashi with a Running 29 Years Old to get his first victory since his car accident. 

July 15, 2010 at the Shin-Kiba 1st Ring, Mammoth would make his return to Shin-Kiba by teaming up with Kamui to take on Tatsuhito Takaiwa and Masashi Takeda. It would be the first time that Mammoth would go up against the young upstart Takeda as they would end up exchanging chops and clotheslines during the match, but it would be Takaiwa that would end up getting the win after hitting Kamui with a Death Valley Bomb to score the pinfall.

August 1, 2013 at the Chiba Blue Field, FREEDOMS would run at the Kaientai Dojo's home building and as a result Mammoth and his partner Keita Yano would team up against Tatsuhito Takaiwa and K-Dojo's Yuji Hino. Mammoth and Hino would go all out on each other with chopping each others chest. Mammoth's chest would be blistering red afterwards with Hino's not being much better and even after exchanging chops back and forth that would cause Mammoth's chest to be so blistered they would get in another chopping exchange again later in the result. Hino would tag out to Takaiwa who would square off with Mammoth with Mammoth tagging in Yano who would end up getting caught and hit with a Fire Thunder and then hit with a Death Valley Bomb for the win for Hino and Takaiwa.

 

August 25, 2010 at the Shin-Kiba 1st Ring, Mammoth would not enter in the Death Match Tournament and instead would open the show in a non tournament 6 man Hardcore Match along with Ricky Fuji and K-Dojo's Ryuichi Sekine against Brahman Shu, Kei, and Ken45 with Sekine wearing an FMW t-shirt due to teaming with Mammoth and Ricky. They would all brawl around ringside until Mammoth on the apron would attempt to chokeslam one of the Brahman's through a table until Ken45 would manage to make the save by hitting Mammoth across the back with a kendo stick. Mammoth would instead be placed on the table with one of the Brahman jumping off the turnbuckle onto Mammoth laying on the table with the table not coming close to breaking. Sekine would get beaten down for a majority of the match until Mammoth would come in and make the hot tag. Mammoth would go for the 29 Years Old but Ken45 would stop him. This would lead to Mammoth, Ricky, and Sekine being tied up with Shu, Kei, and Ken and delivering a triple suplex to the Brahman's and Ken. Mammoth, Ricky, and Sekine would then pick up them all and deliver a triple Kamikaze and made a triple pinfall with all three kicking out. But while Mammoth and Ricky were on the outside the ring brawling with Kei and Ken45 it would leave Sekine alone with Shu who would end up delivering a Zombie Kick and then getting the win with a Fireman's Buster on the chair for the win.

August 26, 2010 at the Shin-Kiba 1st Ring, Mammoth would take on his friend and partner Kamui in a Hardcore Match with Kamui getting the fast start by throwing a chair and drop kicking it before the start of the match. Kamui would throw Mammoth in the crowd and throw a chair at him. Mammoth would eventually get sick of the smaller Kamui being in control and would over power him and throw him in the crowd and then charge at him with a chair. They would brawl to the aisle when Kamui would go and get a ladder and hit Mammoth with it. Kamui would place the ladder against the two stands and climb up and deliver a Moonsault to Mammoth on the aisle ramp. Mammoth would come back by picking up the ladder and tossing it at Kamui. Mammoth would pick up Kamui and hit a running powerbomb on the ramp sending Kamui over the ropes and into the ring. Mammoth would place the ladder against Kamui's crotch and hit it with a chair. Mammoth would then grab a chair and place it over Kamui's throat and begin choking him with the chair. Kamui would fight back delivering a hurricanrana with Mammoth landing on the ladder as well as an Arabian Press and then finally would place a chair over Mammoth's head and hit him with his own Mammoth Home Run. This would be enough for Mammoth would get up and angrily throw a chair at Kamui's face and then finish off Kamui with a 29 Years Old on two chairs stacked on a ladder for the win. Mammoth afterwards would comment that Kamui had gotten much stronger in the two years since their last match in August 2008 for WMF's last show.

August 29, 2010 at Korakuen Hall, Mammoth and Daisuke Sekimoto would reunite their tag team for the first time since February 13, 2009 as they would take on the team of Yoshihito Sasaki and Yuji Okabayashi. Mammoth would go up against the man he help trained 10 years earlier in Yoshihito with them exchanging slaps before Yoshihito would tag in Okabayashi. Okabayashi would square off against Mammoth for the first time with them exchanging chops and punches to the chest. Mammoth would face off against Sasaki again as they would both begin exchanging chops until Yoshihito would out of nowhere hit a spear on Mammoth and make the tag. Mammoth and Okabayashi would begin delivering hard clotheslines to one another until both would end up falling to the mat at the same time. Sekimoto would end up coming in and getting the tag and eventually putting away Okabayashi with the German Suplex for the Mammoth and Sekimoto in what would be the last time they would team for another year.

September 12, 2010 at the Iwate Ichinoseki City Gym U Dome Sub Arena, Mammoth would team up with fellow big man Shuji Ishikawa to take on the team Daisuke Sekimoto and Kankuro Hoshino. Mammoth and Sekimoto would square up against each other for the first time since Mammoth's return back in June and they would start where they left off by chopping the hell out of each other and then charging at one another with both falling down on the mat at the same time. Mammoth and Sekimoto would go at it again with Mammoth would come charging hard at Sekimoto with a lariat right away but Mammoth would get flipped over attempting a powerbomb. They would again meet each other with hard clotheslines knocking each other down and both tagging out. Shuji Ishikawa would eventually finish off Hoshino with Mammoth and Sekimoto outside the ring as Ishikawa would nail Hoshino with the Splash Mountain for the win.

September 15, 2010 at the Shin-Kiba 1st Ring, Mammoth Sasaki would team up with fellow FREEDOMS members GENTARO and Kamui to take on the team of Shuji Ishikawa, Kankuro Hoshino, and Daisuke Masaoka in a Hardcore Match in Big Japan. Mammoth and Shuji Ishikawa would go at it right away against each by swinging chairs at one another until all six men would be brawling all over the building. Kamui would end up bringing out a ladder and with the help of Mammoth holding both Hoshino and Masaoka he would deliver a moonsault off the ladder placed on top of the two bleachers on the ramp. Mammoth would place the ladder on his head but before he could use it as a weapon he would be met by Ishikawa's foot to the face. The brawl between all the wrestlers would lead outside Shin-Kiba where Ishikawa and Hoshino would hold on to Mammoth, Kamui, and GENTARO while Masaoka would climb on top of the Big Japan moving truck and flip off the truck on to all five wrestlers. They would end all back in the ring with Kamui delivering a hurricanrana to Hoshino. Mammoth would feel the end near as he would nail Hoshino with a Mammoth Home Run, a lariat, and then finish him off with a 29 Years Old on a stack of chairs for the FREEDOMS win.

September 21, 2010 at the Shin-Kiba 1st Ring, Mammoth would take on GENTARO in his first main event singles match for FREEDOMS. Mammoth would no longer be protected the way he was while having the WEW World Title or with how the Apache Army had booked him the last year before his injury. Takashi Sasaki was now fully in charge and that would mean Sasaki would be booked below Takashi Sasaki and his friends Jun Kasai and GENTARO. This match would be the prime example that Mammoth was not going to be booked as a top guy in this promotion nor did it seem like Mammoth really cared the same about pro-wrestling since coming back. Mammoth would end up losing to GENTARO after GENTARO would get the win with a Rolling Clutch Hold. 

October 11, 2010 at the Sapporo Teisen Hall, Mammoth would have another big challenge as he would take on Tatsuhito Takaiwa. Mammoth and Takaiwa would start off by chopping each others chest hard causing another red mark across Mammoth's chest although nothing like Yuji Hino had done months prior. Takaiwa would take control after that and take the match outside where he throw Mammoth outside towards a stack of chairs. Takaiwa would control a majority of the match after while bringing Mammoth back in the ring. Mammoth would manage to escape a Michinoku Driver followed by his Death Valley Bomb. Mammoth and Takaiwa would begin exchanging clotheslines with Mammoth ducking Takaiwa's and then clotheslining the back of his head. Mammoth would then nail Takaiwa with the 29 Years Old to pick up his first big singles win since his return as it would be Takaiwa's first singles loss in FREEDOMS over the past year.

October 17, 2010 at Korakuen Hall, Mammoth would return to Big Japan to team up with rookie Kazuki Hashimoto against Yuji Okabayashi and rookie Takumi Tsukamoto. Mammoth would completely over power the much smaller and younger Tsukamoto when pit up against Mammoth but Okabayashi would be able to hold his own as he would match power move for power move with Mammoth including both not being able to knock each other down with hard clotheslines. Mammoth would finally get the best of Okabayashi by delivering a powerslam to Okabayashi but would tag out to Hashimoto and Okabayashi would then be too much for the smaller Hashimoto as he would deliver a splash off the top rope finishing off Hashimoto for the win. This would turn out to be Mammoth's last Big Japan match after working for the promotion off and on for five years. 

October 28, 2010 at Shin-Kiba 1st Ring, Mammoth would team with The Winger and Kamui to take on the Kojika Army team of Kazuhiko Ogasawara, Brahman Shu, and Kei. Mammoth would be overpowering both Shu and Kei when Ogasawara would be kicking hard at Mammoth's knee. Shu and Kei would take advantage of Mammoth's injured knee and begin twisting it and turning it. Mammoth would overcome the attack with his power and just as he was about to powerbomb Kei he would be met with Indian black ink spit in his face by Shu. Shu and Kei would then grab a chair and begin smashing Mammoth's already injured knee with it knocking him out the rest of the match as Kamui would get tagged in. Kamui would take on Kei but would end up being hit by Kojika with an umbrella as Kei would then follow that up with the School Shooter for the win. Shu, Kei, Ogasawara, Kojika, and Antonio Honda would all begin attacking the injured Mammoth and Kamui when Ricky Fuji would rush to the ring to make the save but Ogasawara would go after him. Ken45 would then rush to the ring and make the save officially turning on the Brahmans and the Kojika Army to help clear the ring for Kamui, Ricky, and covered in black ink Mammoth. 

November 25, 2010 at Shin-Kiba 1st Ring, Mammoth and Kamui would team up to take on the team of Masashi Takeda and Madoka. This match would be setup because of the recent Kamui vs. Takeda vs. Madoka feud that had been going on the past few months in the promotion. Mammoth would square off against Takeda right at the start and although they would exchange chops to one another it would be later when Takeda would try to take out Mammoth's knee during the match by attacking it and placing him in knee locks trying to get him to submit. Mammoth would manage to tag out to Kamui but would be unable to help him while Takeda and Madoka would double team him. Kamui would manage to make it without getting pinned when Mammoth would finally be able to help him out. Mammoth would come in and chokeslam Madoka as Kamui would deliver a 450 Fire Bird Splash with Madoka kicking out. Mammoth would take it from there by finishing off Madoka with the 29 Years Old for the win. Mammoth and Takeda would get in each others faces right afterwards as Mammoth would grab the mic and challenge Takeda to a singles match next month for the Christmas Death Match show.

December 15, 2010 at the Tokyo Shinjuku FACE, Mammoth would team up with Jun Kasai and The Winger as the FREEDOMS team would take on the freelancer team of Takao Omori, Dick Togo, and Tatsuhito Takaiwa. Mammoth would wear tassels around his boots most likely to separate from the fact that was he was black trunks just like his three opponents were as well. Although Mammoth would not be involved in the match he would still have small little skirmish with Takao Omori where Mammoth would actually get the better end of Omori and deliver a Powerbomb to him. Mammoth would end up brawling outside the ring as The Winger would be left alone with Takaiwa as Takaiwa would manage to finish Winger with a Death Valley Bomb with Mammoth and Kasai still outside the ring unable to make the save.

December 25, 2010 at the Shin-Kiba 1st Ring, Mammoth would take on Masashi Takeda in a Barbed wire Board Death Match. Mammoth and Takeda would brawl around ringside at first ending up on the entrance ramp. Mammoth would kick Takeda low and deliver a Running Powerbomb from the ramp to the ring. Mammoth would then take a piece of the barbed wire out of the board and begin slicing Takeda's forehead with it. Mammoth would then try to whip Takeda into the barbed wire but Takeda would reverse it and send Mammoth through the barbed wire board instead. Takeda would then take a piece of the barbed and begin slicing Mammoth's forehead with it. Mammoth would try to make a come back but Takeda would end up spearing him through the other barbed wire board instead. Takeda would place the barbed wire board over Mammoth's body and deliver a flying drop kick on it. Takeda would then deliver a German Suplex to Mammoth with Mammoth managing to kick out. Takeda would try the suplex again but Mammoth would manage to over power it and break out of it and begin just swinging at Takeda's head. Mammoth would then deliver the Awesome Bomb and then finish Takeda off with the 29 Years Old on the barbed wire board for the win. 

December 31, 2010 at Korakuen Hall, Mammoth would team with Kengo Mashimo, Yuko Miyamoto, Munenori Sawa, and Kazuhiro Tamura against the team of Shuji Ishikawa, HARASHIMA, Yoshihito Sasaki, Fujita Jr. Hayato, and Emi Sakura in a Elimination Match for the annual New Years Eve show in the main event. Mammoth would start off the match with one another as they would exchange clotheslines at one another with both falling to the ground at the same time. They would both tag out and while on the apron the screen would start counting down as it would become 2011 during the match. Yoshihito Sasaki would end up eliminating Munenori Sawa leaving the match to be Mammoth and Miyamoto against Shuji Ishikawa and Yoshihito Sasaki. Mammoth would come right at Sasaki as the two would begin exchanging hard lariats towards one another just like they did back in 2001 in FMW. Sasaki would end up managing to knock Mammoth off his feet but as Sasaki would try to deliver a powerbomb to Mammoth he would end up getting picked up and dropped by Mammoth with a Fire Thunder Powerbomb. Mammoth would then tag in Miyamoto as Mammoth would nail a chokeslam on Sasaki followed by Miyamoto delivering the Moonsault. Miyamoto would fail to pin Sasaki with that but would come back with the Thunder Fire on Yoshihito Sasaki to eliminate him. This would leave Shuji Ishikawa against Mammoth and Miyamoto. Ishikawa would fight the two on one attack and end up hitting the Splash Mountain on Miyamoto to get the pinfall elimination resulting in Mammoth against Ishikawa. Mammoth and Ishikawa would end up exchanging hard lariats at one another but Mammoth would end up nailing Ishikawa with two 29 Years Old to eliminate Ishikawa and get the win for his team. This would be the biggest win for Mammoth since his come back and since he won the WEW World Title three years earlier as he was the sole survivor for his team in the main event of a big show at Korakuen Hall. His team would help him up and raise their hands in victory. Emi Sakura would then lead the New Years Celebration with everyone in the show in the ring to celebrate the start of 2011.

January 6, 2011 at the Shin-Kiba 1st Ring, Mammoth would team up with former WMF friends Ricky Fuji and Kamui to take on the team of Takashi Sasaki, The Winger, and Ken45. Sasaki and Winger would shake Mammoth's out of respect but Ken45 would decline the offer to start the match. Mammoth and Takashi Sasaki would end up going at it with one another as they would trade clotheslines trying to knock each other down. Kamui would end up grabbing Sasaki as Mammoth would wind up and deliver a charging lariat although Sasaki would manage to get out of the way and Mammoth would end up knocking Kamui out. Ken45 would come off the top rope at Mammoth and get him out of the ring leading up to Sasaki finishing off Kamui with a Right Leg Kick to get the win over the former WMF wrestlers. Mammoth would then go up against Takashi Sasaki later in the show for a 2 minute time limit match as part of series of 11 two minute matches for Sasaki. Mammoth would be the 10th man that Takashi Sasaki would be facing in the match. Mammoth would come to the ring as the TKG48 and the Kojika Army had began brawling while Sasaki sat there and let them beat each other up as time ran off. Mammoth would clear the ring and go up against Sasaki where they would begin exchanging chops. Mammoth would hit a hard lariat but Sasaki would come back with a hard lariat as well. Sasaki would setup for the right leg kick to Mammoth's head but Mammoth would catch it and pick up Sasaki and deliver an Awesome Bomb. Mammoth would then pick up Sasaki by his shoulder and drop him for a Thunder Fire Powerbomb. Mammoth would then nail Sasaki with the 29 Years Old but just before the referee could count to three the bell would ring and the two minutes for the match had expired for the time limit draw.

February 14, 2011 at Shin-Kiba 1st Ring, Mammoth would team up with fellow black trunk wrestlers Takao Omori and Tatsuhito Takaiwa against the FREEDOMS team of Takashi Sasaki, Jun Kasai, and Kamui. It would start right off as a brawl that would end up with all six wrestlers brawling all over the building. Mammoth and Takashi Sasaki would pair up as they would begin exchanging chops towards one another in the stands. By the time things had settled down and everyone had gotten back to ringside it would be Kamui that Mammoth would go up against. Kamui would be one step ahead of Mammoth the entire sequence as Mammoth would go for an Awesome Bomb and Kamui would turn it into a hurricanrana, Mammoth would go for a choke slam and Kamui would manage to reverse out of it. Kamui would even manage to deliver a Pele Kick to Mammoth with Mammoth getting no real offense against Kamui before tagging out. Mammoth would make his presence known as Takashi Sasaki would begin setting up for his Charging Lariat when Mammoth would come rushing at him with a lariat setting up Takaiwa to pick him up and hit the Death Valley Bomb and then finished off by Omori's lariat for the win. 

March 6, 2011 at the Osaka World Hall Pavilion, Mammoth would team up with Kamui to take on the team of Magnitude Kishiwada and Masashi Takeda in a Hardcore Match. Mammoth and Takeda would start brawling all over the building right away but by the time Mammoth would make it back into the ring Kishiwada would have a chair waiting for him. Mammoth would grab a chair and they would begin dueling chairs before fighting to the outside. Kamui would end up coming in and getting destroyed by Takeda with a table and a ladder before Mammoth would make the tag and put the ladder over his head and nail both Kishiwada and Takeda with it. Mammoth would place the ladder over the crotch of Kishiwada and begin smashing it with a chair. Takeda would end up throwing Mammoth in the corner and placing a chair over his crotch for some revenge but as Takeda would rush into the corner with his knee Mammoth would put the chair up in front with Takeda smashing his knee across it. Mammoth would end up putting a chair over Takeda and smashing him with the Mammoth Home Run. Mammoth and Kishiwada would then begin to clothesline one another but Takeda would take Mammoth the outside leaving Kamui to go up against Kishiwada and Kishiwada would end up nailing Kamui with a lariat for the win. 

March 11, 2011 a devastating 9.0 Earthquake would hit the Tohoku region but would be of such a high magnitude that it would be felt 232 miles away while in Tokyo. FREEDOMS would move their show scheduled for March 13, 2011 to March 22, 2011 at the Shin-Kiba but Mammoth would not only cancel appearing on the show but the March 26th show in Fukuoka as well. Mammoth who lives in the even more southern region of Japan of Osaka which was less effected than most other cities would not explain why he had canceled appearing and would just apologize.

April 21, 2011 at the Shin-Kiba 1st Ring, Mammoth would return and face off against small indy wrestler Akito who works for the Nagoya based DEP promotion. Akito would try taking down Mammoth and working on his legs. Akito would get Mammoth in the Ankle Lock but Mammoth would kick Akito out of the ring into the ramp. Mammoth would pick him and up and deliver a running powerbomb from the ramp over the top rope to the outside. Mammoth would then hit a running lariat with Akito managing to kick out. Mammoth would then finish him off with the 29 Years Old for the win. 

May 8, 2011 at the Zepp Nagoya, Mammoth would take on Takao Omori in a singles match as the two would begin exchanging chops. Omori would step outside to take a break and Mammoth would come after him and throw his shoulder into the ring post. Mammoth would go after the shoulder the rest of the match including delivering head butts to Omori's shoulder. Mammoth and Omori would begin exchanging lariats with one another trying to knock the other down when Omori would shove Mammoth into the ropes and then reverse cradle Mammoth for the win.

May 31, 2011 at the Shin-Kiba 1st Ring, Mammoth would team with Kamui as he would get another chance at Takao Omori who was teaming with Madoka. Mammoth and Omori would go right at it again with both exchanging chops towards one another. They would tag out and tag back in and Omori would go for a lariat with Mammoth ducking it and grabbing him and delivering a German Suplex. Omori would manage to get up and nail Mammoth with his lariat. Kamui would end up going against both Omori and Madoka and would end up making the hot tag to Mammoth. Mammoth would throw Kamui to the ropes so that he can hit a baseball slide on Omori to keep him out of the ring as Mammoth would go for the finish. Mammoth would hit the Awesome Bomb but Madoka would manage to escape the pinfall. Kamui would deliver an Asai Moonsault to the outside on Omori to give Mammoth more time to defeat Madoka. Mammoth would go for the 29 Years Old but Madoka would end up rolling Mammoth up for a near fall. Mammoth would then deliver a lariat that would spin Madoka around. Mammoth would then finally manage to hit the 29 Years Old on Madoka for the win.

June 22, 2011 at the Shin-Kiba 1st Ring, Mammoth would ditch the black trunks for good starting with this match and begin wearing long blue jean shorts as he would team up with Ricky Fuji to take on the team of Jun Kasai and HIROKI in a Hardcore Match. The match would start off with Mammoth and Kasai brawling all over the building. Kasai would end up swinging Mammoth into the turnbuckle outside the ring busting him up. They would continue to brawl all into the stands with Mammoth grabbing a bottle and tossing it at Kasai's head. Mammoth and Kasai would make it back into the ring eventually with both of them bloody as a result of their brawl around the building. Kasai would end up delivering a Pearl Harbor Splash and connecting on Mammoth but as the referee was counting two Mammoth would not only manage to make it up but he would bring Kasai with him as he would pick up Kasai and deliver the 29 Years Old for the two count. Mammoth and Kasai would trade clotheslines to one another but Mammoth would end up hitting a powerful lariat to Kasai and would then finish him off with the 29 Years Old for the win. Mammoth would grab the mic and announce that he would participating in Jun Kasai's Death Match Tournament in August for the first time. This would be the official beginning of Mammoth and Jun Kasai feuding with one another. 

July 26, 2011 at the Tokyo Shin-Kiba 1st Ring, Mammoth Sasaki would team up with Takashi Sasaki and Masashi Takeda against the team of Jun Kasai, The Winger, and Kamui in a Two out of Three Falls Hardcore Match to get ready for the Death Match Tournament the following month. Mammoth and Kasai would start off brawling all over the building to start the match with Mammoth busting open Kasai and trying to choke him out with a chair across his throat before tagging out. Mammoth would end up going against Kamui would who would come off the top rope but Mammoth would be ready for him and would throw a chair at his head as he was coming off the top ropes. Mammoth would then bring Kamui outside to the entrance ramp where he would deliver a running powerbomb off the ramp into the ring. Mammoth would then end up scoring the first fall for his team after nailing Kamui with the 29 Years Old to get the pinfall. In the second fall with Takashi Sasaki holding on to The Winger by his arms a charging Mammoth would come at Winger who would be able to get away causing Mammoth to run into Takashi Sasaki allowing The Winger to roll up Mammoth with a inside cradle for the pin and to tie it up one fall a piece. Kamui would end up scoring the third fall in a big time upset as he would roll up Takashi Sasaki with the Kamui Clutch to get the win for his team.

August 24, 2011 at the Shin-Kiba 1st Ring, Mammoth would enter the Death Match Tournament for the first time with his first round opponent being Kenji Fukimoto in a Scramble Bunkhouse Death Match. Mammoth would grab the barbed wire bat but Fukimoto would go low and begin using the barbed wire bat to slice open Mammoth's forehead. Every time Mammoth would end up grabbing the bat he would end up getting a lowblow from Fukimoto who would control a majority of the match. Mammoth would finally successfully grab a hold of the bat and smash it across Fukimoto's chest. Mammoth would then place a chair over Fukimoto's head and just as he was about to hit the Mammoth Home Run he would get green mist in his face. Mammoth with green mist covering his face and blood dripping down would finally have enough and come charging with a hard lariat and then hit the Mammoth Home Run successfully. Mammoth would then finish off Fukimoto by picking him up and the barbed wire bat and dropping him with the 29 Years Old for the win and to advance to the semi-finals of the Death Match Tournament.

August 25, 2011 at the Shin-Kiba 1st Ring, Mammoth's semi-finals opponent in the Death Match Tournament would be MASADA in a Barbed wire Board Death Match. Mammoth and MASADA would start pounding at each other early with Mammoth using some of the barbed wire from the board to cut open MASADA right away. They would end up brawling in the crowd with a barbed wire bat with MASADA using the barbed wire bat to cut open Mammoth. They would make it back into the ring where Mammoth would setup the barbed wire board and then deliver a running powerbomb from the entrance ramp through the barbed wire board. Mammoth would then try to whip MASADA into the second barbed wire board but MASADA would manage to counter it and send Mammoth into the board instead. MASADA would then place the board across Mammoth's body and deliver an impressive moonsault onto the barbed wire board on Mammoth. Mammoth again would fight back and deliver an Awesome Bomb and then with some barbed wire stuck to the chair place it over MASADA's head and nail the Mammoth Home Run for a two count. The barbed wire would end up getting stuck in MASADA's hair as a result but MASADA would make his come back as Mammoth would try to nail the 29 Years Old along with the barbed wire bat to MASADA but MASADA would manage to escape it and deliver a clothesline. MASADA would then pull out his BBQ sticks and begin plating them in Mammoth's skull while placing him in the STF. Mammoth would refuse to submit so MASADA would then place a chair across Mammoth's neck while placing him again in the STF forcing the referee to end the match and award MASADA the win and eliminating Mammoth. MASADA would end up losing in the finals to The Winger in the finals of the tournament.

August 27, 2011 at the Osaka Prefectural Gym # 2, Mammoth would be booked by Nanjyo Hayato for an FMW reunion show for his debut show of his FFF promotion. The show would include Atsushi Onita, Megumi Kudo, Kintaro Kanemura, Ricky Fuji, and Flying Kid Ichihara among other former FMW wrestlers on the show. But Mammoth would be booked in a undercard match with no former FMW wrestlers on the show. Instead he would team with semi-regular WMF wrestler Kengo Takai to take on the smaller team of local talent Yutaka and Michio Kageyama. Yutaka would end up fairing well against Mammoth using his quickness and delivering a hurricanrana to Mammoth. Kageyama would not fair as well after tagging in. Kageyama would charge at Mammoth with Mammoth picking him up although botching delivering a powerslam to him in the same sequence. Mammoth and Takai would then place a chair over Kageyama's head and deliver a double Mammoth Home Run with Yutaka making the save. Mammoth would then deliver a lariat and then finish off Kageyama with the 29 Years Old for the win. After the match all four wrestlers would shake hands with one another out of a sign of respect for Mammoth's first and only FFF show as Nanjyo would no longer build the promotion around former FMW wrestlers.

September 11, 2011 at the Iwate Ichinoseki City Gym U Dome Sub Arena, Mammoth would reform his team with Daisuke Sekimoto for the first time in over a year as they would take on the team of Takashi Sasaki and Shuji Ishikawa. Mammoth would go into the match taped up across his shoulder and back as he would catch a kick from Takashi Sasaki and would go to pick him up and deliver a powerbomb he wouldn't get Sasaki all the way up before dropping him awkwardly on his head. Takashi Sasaki would end up being okay as Mammoth would hold on to his taped up shoulder after the messed up move. Mammoth would pick up Takashi Sasaki and deliver a choke slam to him as Sekimoto would come off the top rope and deliver a frog splash. Mammoth would then hit a hard clothesline and then a Awesome Bomb but Sasaki would manage to kick out and fight back. Sasaki and Ishikawa would deliver clotheslines to Mammoth followed by Takashi Sasaki delivering Kodo Fuyuki's old Charging Lariat before finishing off Mammoth with a Michinoku Driver II for the win. It would turn out to be the last time that Mammoth and Daisuke Sekimoto would team up.

September 22, 2011 at the Tokyo Shinjuku FACE, Mammoth would team up with FREEDOMS regulars Tatsuhito Takaiwa and Masashi Takeda to take on the Big Japan team of Yoshihito Sasaki, Ryuichi Kawakami, and Atsushi Ohashi with Mammoth picking up the win after hitting 29 Years Old on Ohashi. Mammoth afterwards got on the mic and call out Ryuichi Sekine to the ring. Mammoth would state that he was apart of the first ever WEW Hardcore Tag Team Champions and that he wanted to hold the belts again with Kamui as his partner and wanted a shot at Ryuichi Sekine and his partner Kengo Mashimo's belts. Sekine replied back stating that it doesn't matter if he was apart of the first championship team that he would have to earn a title shot first before getting one. Sekine would then attack Mammoth and hit him across the head with the WEW Hardcore Tag Title belt but as Sekine would charge at Mammoth for a clothesline Mammoth would grab Sekine by the throat and deliver a chokeslam before placing the belt across Sekine's body and challenging Mashimo to a singles match for a chance at the WEW Hardcore Tag Team Titles.

October 9, 2011 at the Sapporo Teisen Hall, Mammoth would face off against Kengo Mashimo and if Mammoth were to win than he would be given a shot at the WEW Hardcore Tag Team Titles with Kamui. Mammoth would go after Mashimo before the match with a chair and begin brawling with him outside the ring as well as hitting him across the head with the WEW Hardcore Tag Team Title belt. Ryuichi Sekine would get too close to him and Mammoth would end up throwing Sekine into a bunch of chairs where the fans had been sitting. Sekine would come back and begin attacking Mammoth with Kamui going after Sekine while Mammoth and Mashimo continued to brawl all over the building before making it back into the ring. Mammoth would grab a chair and place it over Mashimo's head with the referee trying to grab the chair away from Mammoth resulting Mammoth kicking the referee away and hitting Mashimo with the Mammoth Home Run. Kamui would then hand Mammoth a barbed wire bat and just as Mammoth were to use it on Mashimo the referee would again try to grab it from Mammoth and again Mammoth would kick the referee down. Mammoth would then swing the barbed wire bat with Mashimo moving out of the way and Mammoth striking the referee with the barbed wire bat and the referee calling for a DQ win for Mashimo as a result. Mammoth would grab the mic and demand that Mashimo give he and Kamui a shot at the WEW Hardcore Tag Team Titles with Mashimo accepting and Mammoth and Kamui brawling with Mashimo and Sekine before things would finally get cleared up.

October 27, 2011 at the Tokyo Shin-Kiba 1st Ring, Mammoth and Kamui would challenge Kengo Mashimo and Ryuichi Sekine for the WEW Hardcore Tag Team Titles. Mammoth and Mashimo would begin brawling with one another right away with Mammoth grabbing the kendo stick that Mashimo had brought to the ring and using it on him as they would begin brawling into the stands. Kamui would brawl with Sekine and would setup a stack of chairs and place a table across but before he would ever get to send Sekine through the table it would be Mammoth and Mashimo brawling to the apron of the ring where Mashimo would end up slamming Mammoth into the table without the table having any give to Mammoth. Mashimo would then place the table over Mammoth's body outside the ring and deliver a double knee jump onto the table placed over Mammoth. Mammoth would be unable to help out Kamui for a long time as it would be a two on one until Mammoth would end up getting up and picking up a ladder and throwing it at the back of both Mashimo and Sekine. Mammoth would grab a barbed wire bat and swing it across Mashimo's chest. Mammoth and Kamui would then end up placing a chair over Mashimo's head and deliver a Double Mammoth Home Run to Mashimo. Mashimo would be thrown outside the ring as Kamui would dive outside the ring onto him leaving Mammoth alone with Sekine. Mammoth would deliver the Mammoth Home Run followed by an attempted powerbomb that Sekine would turn into a roll up with Mammoth barely kicking out. Mammoth would grab Sekine and deliver a powerbomb and then finish him off with the 29 Years Old while holding onto the barbed wire bat to get the pinfall and finish off Sekine to win the WEW Hardcore Tag Team Titles. It would be the first time that Mammoth would be holding the blue WEW Hardcore Tag Team Titles since January 7, 2001 over 10 years and 10 years since he and Hideki Hosaka lost the titles to GOEMON and Onryo. It would be Mammoth's fourth reign as WEW Hardcore Tag Team Champion.

November 13, 2011 at the Hiroshima Industrial Hall East Pavilion, Mammoth would face off against Yuko Miyamoto in a battle of the former WMF wrestlers. Mammoth who had actually help train Miyamoto along with Mr. Gannosuke would face to be facing him for the first time in a singles match against each other. Mammoth and Miyamoto would start off by brawling on the outside of the ring when Miyamoto would bring in a barbed wire bat and begin slicing open Mammoth with it. Mammoth would end up getting a hold of the bat and would do the same as he would slice open Miyamoto with both of them bleeding. Mammoth would end up putting a chair over Miyamoto's head and hitting the Mammoth Home Run with it with Miyamoto managing to kick out. Mammoth and Miyamoto would begin exchanging headbutts to one another with blood pouring down both their faces when Mammoth would grab Miyamoto and hit a Thunder Fire Powerbomb on him. Miyamoto would come back by escaping Mammoth's attempt at the 29 Year Old on the barbed wire and instead pick up Mammoth and deliver Gannosuke's old Fire Thunder on the barbed wire bat. Miyamoto would pick up the baseball bat and hit a moonsault with the bat on Mammoth. Miyamoto would then try again but this time leave the barbed wire bat on Mammoth instead. This would turn out to be a mistake as Mammoth would get up with the bat in hand and smash it across Miyamoto's back. Mammoth would pick up Miyamoto off the top turnbuckle and deliver the 29 Years Old except Miyamoto would manage to kick out at a 1 count. Mammoth would hit the 29 Years Old again but Miyamoto would manage to kick out at two this time. Mammoth would then pick up the barbed wire bat and Miyamoto and again hit the 29 Years Old and finally manage to put away Miyamoto for the win. 

November 23, 2011 at the Tokyo Shin-Kiba 1st Ring, Mammoth would team with Takashi Sasaki and Kamui against the team of Jun Kasai, Masashi Takeda, and HIROKI in a Hardcore Match. Mammoth would debut his new wooly mammoth furry jeans instead of the blue jeans he has been wearing since dropping the traditional black trunks. Mammoth and Kasai would continue their feud from the Summer by starting the match brawling with one another. By the time Mammoth would make it in the ring he would be facing off against Masashi Takeda who would attempt to spear him but instead would end up getting picked up and dropped by a powerbomb. Takeda would tag in HIROKI who Mammoth would deliver a chokebomb to before tagging out. Mammoth would end up coming back in the ring and delivering a chokeslam to Kasai to setup Kamui climbing the top rope when Kenji Fukimoto would return and come to the ring and throw a chair at Kamui. This would allow Takeda to suplex Kamui off the top rope and HIROKI to hit a running knee to Kamui's face for the win. 

December 25, 2011 at Korakuen Hall, Mammoth would team up with Takashi Sasaki to take on the team of Masato Tanaka and Daisuke Sekimoto. Mammoth and Tanaka would start off going at it as they would brawl outside the ring and begin exchanging chops towards the chest. Mammoth would make it back in the ring where he would be met by Sekimoto charging at him with a clothesline. Mammoth wand Sekimoto would keep clotheslining one another until Mammoth would actually knock Sekimoto down. Mammoth and Tanaka would begin battling when Tanaka would lay some chairs down on Mammoth and attempt to deliver the Frog Splash. Mammoth would get up in time and climb the top turnbuckle and suplex Tanaka off the top turnbuckle into the chairs. Sekimoto would come at Mammoth but as Mammoth would attempt to suplex him Sekimoto would break free and deliver a kick to the back of Mammoth's head. Tanaka would then grab a hold of Mammoth and attempt to suplex him. Sekimoto would then grab Tanaka and suplex him while Tanaka would suplex Mammoth causing Mammoth to land on his shoulder hard. Mammoth and Sekimoto would both hit Frog Splashes on Mammoth and Tanaka would deliver his Sliding D with Mammoth kicking out. Tanaka would go for it again but Mammoth would make it up to his feet and deliver a clothesline to Tanaka instead. Mammoth and Takashi Sasaki would grab chairs and place one over Tanaka and deliver a Double Mammoth Home Run to Tanaka. Mammoth would then hit the 29 Years Old on Tanaka with Sekimoto making the save. Mammoth would get back up to his feet but would be met by elbows to the face by Tanaka followed a running elbow to the face knocking Mammoth down. Tanaka would then deliver his Sliding D once again and that would be too much for Mammoth as Tanaka would end up getting the win over Mammoth. 

January 9, 2012 at the Tokyo Shin-Kiba 1st Ring, Mammoth and Kamui would defend their WEW Hardcore Tag Team Titles for the first time against Brahman Shu and Kei. Mammoth and one of the Brahman's would start brawling in the crowd with Mammoth getting hit by a fans Adidas bag and then choked out by it as well. Mammoth would make it back in the ring to help out Kamui setup delivering a Michinoku Driver through a table off the apron to one of the Brahman Brothers while Mammoth took the other onto the entrance ramp and delivered a running powerbomb on the ramp over the top rope to the outside. Mammoth and Kamui would then deliver a double Mammoth Home Run and then as Mammoth was about to deliver a chokeslam into the chairs to setup Kamui coming off the top turnbuckle with a Fire Bird Splash it would all get messed up when the Brahman who had been sent through the table by Kamui would come back in the ring and spit black Indian ink in Mammoth's face blinding him. Shu would end up grabbing a chain and begin wrapping it around Mammoth while Kei would grab two barbed wire bats and deliver a Fireman's Carry on Kamui on both bats to get the win and win the WEW Hardcore Tag Team Titles from Mammoth and Kamui.

February 5, 2012 at the Yokohama Radiant Hall, Mammoth would take on Kamui in a Hardcore Match in what was turning into a biyearly tradition singles match between Mammoth and Kamui who he helped train in the WMF Dojo. Kamui would get a jump start by hitting Mammoth that he had brought into the ring before the match had even started. Kamui would grab a barbed wire bat and begin cutting open Mammoth with it. Mammoth would end up getting the barbed wire bat and smashing it across Kamui's chest. Mammoth would then grab the ladder and place it against Kamui's crotch and smash the ladder with a chair. Kamui would fight back and drop kick a chair that Mammoth was holding into his face. Kamui would then place several chairs across Mammoth's body and then hit the Swanton Bomb onto Mammoth. Kamui would then grab a chain and place it across Mammoth's neck. Kamui would try to throw Mammoth over the top rope with the chain but Mammoth would grab Kamui by the neck and choke slam him. Mammoth would place a chair on Kamui's head and just as he would swing another chair for the Mammoth Home Run he would end up missing as Kamui would manage to duck and miss the chair swing. Mammoth would take the ladder and place it over his head and begin swinging at Kamui with it as Kamui would duck and drop kick Mammoth's knee. Kamui would grab a chair and swing at the ladder still draped across Mammoth's neck. Kamui would setup the ladder and tie the chain around his hand and begin to climb it but Mammoth would manage to get up and climb it as well as they would begin punching each other on top of the ladder. Kamui would end up knocking Mammoth while still standing up as Kamui would place the chain around his neck while on top of the ladder and begin choking Mammoth with it. Mammoth would use his power to pick up the ladder causing Kamui to fall off it. Mammoth would deliver a powerbomb to Kamui but as he was about to setup to finish off Kamui he would end up getting slapped in the face by Kamui followed by a Kamui Clutch as Mammoth would barely kick out. Mammoth would have enough as he would get up and deliver a clothesline to Kamui. Mammoth would hit the 29 Years old Kamui with Kamui kicking out. Mammoth would then place the barbed wire bat against Kamui's back as he would once again hit the 29 Years Old for the win. Mammoth would grab the mic afterwards to tell Kamui to team up with him and win back the WEW Hardcore Tag Team Titles from the Brahman Brothers as they would shake hands afterwards. 

February 11, 2012 at the Osaka World Hall Pavilion, Mammoth and Kamui would team up to try and win back the WEW Hardcore Tag Team Titles from Brahman Shu and Kei. Shu and Kei would attack Mammoth and Kamui before the bell and eventually all four would end up brawling in the crowd. Mammoth would even take a fans drink and smash it over the Brahman Brothers head. When getting back in the ring the Brahman's would double team Kamui for a long period of time until finally Kamui would make the tag to Mammoth. Mammoth would grab a ladder in the ring and place it over his neck and nail both Shu and Kei with it before just throwing it at the both of them. The Brahman's would go low on Mammoth to gain control back as they would attempt to piledrive Mammoth onto a metal box but Mammoth would use his power to send the Brahman into the box instead. The other Brahman Brother would try the same piledriver with a street sign except this time Mammoth would just pick up the sign and smash it over their head instead. Mammoth would tag in Kamui but would end up having to make the save after the Brahman's would hit their No One's Perfect on Kamui for the near victory. Mammoth would clothesline one Brahman and power slam the other. Mammoth would Kei by the throat and just as he was about to go for the choke slam, Shu would come in attempting to spit Indian Black Ink in Mammoth's face. Kamui would make the save with a Pele Kick to Shu in the back of the head and as a result he would spit it in Kei's face. Mammoth would end up nailing the 29 Years Old on Kei and Kamui would follow it with the 450 Fire Bird Splash to get the pin on Kei and win back the WEW Hardcore Tag Team Titles which would be Mammoth's fifth reign with the title.

March 13, 2012 at the Tokyo Shin-Kiba 1st Ring, Mammoth would team up with Takashi Sasaki and Kamui to take on Keizo Matsuda's new group of Matsuda, Kuga, and Bear Fukuda. Mammoth would square up against Fukuda but Kuga would attack Mammoth from behind as they would double team him. Mammoth would come back by clotheslining both of them. Mammoth would tag in Kamui who would take a beating from the group for quite awhile until Kamui would make the hot tag to Mammoth. Mammoth would come in and start attacking Kuga and nail him with a clothesline before tagging in Takashi Sasaki. Takashi Sasaki would go for his Charging Lariat but as he was going up against the ropes he would get hit by two chairs by Kuga and Fukuda and Matsuda would roll him up with a Japanese Leg Roll Clutch for the win. 

March 30, 2013 at the Tokyo Shin-Kiba 1st Ring, Mammoth would take on 21 year old Toru Sugiura as Sugiura was having to earn his way to become a full time member of the FREEDOMS promotion. Mammoth would give Sugiura very hard chops to start the match and just when Sugiura would start to take advantage with hard strikes at Mammoth he would end up being hit with a Mammoth headbutt followed by a powerbomb. Sugiura would end up busting open his mouth but would fight back and deliver a cross body off the top rope and get the near upset over Mammoth. Mammoth would come with a hard clothesline but Sugiura would catch him and crucifix Mammoth into another near pinfall. Mammoth would have enough and deliver a hard clothesline to Sugiura that would connect and follow that up with the 29 Years Old for the win. After the main event, Jun Kasai would end up turning on Takashi Sasaki after nailing him with a clothesline while Sasaki was giving his closing promo. Kasai would proclaim that he was leaving the FREEDOMS Army and joining up with Masashi Takeda and Kenji Fukimoto to form the group Unchain. Kasai would also announce that Tomoaki Honma who had recently been let go by New Japan would be joining their group as well. This would cause Mammoth to charge to the ring with Kasai, Takeda, and Fukimoto celebrating together. 

April 25, 2012 at the Tokyo Shin-Kiba 1st Ring, the FREEDOMS Army of Mammoth, Takashi Sasaki, and Kamui would take on three members of Unchain in Masashi Takeda, Kenji Fukimoto, and Tomoaki Honma who would be coming into replace Jun Kasai. The three members of FREEDOMS and Unchain would pull ropes to see who they all would face in singles matches on the show. Mammoth and Kenji Fukimoto would end up pulling onto the same rope. Mammoth would face off against Fukimoto in a Hardcore Match with Fukimoto attacking Mammoth before the start of the match. Fukimoto would attempt to suplex Mammoth off the apron to the outside but instead Mammoth would use his power to suplex Fukimoto off instead. Mammoth would begin throwing chairs at Fukimoto's body. Mammoth would bring in the barbed wire bat as he would begin pressing it up against Fukimoto's face before shredding open his forehead with cutting him up. Fukimoto would try getting up to his feet and fighting back but Mammoth would just deliver a hard smack to the face in return. Mammoth would grab a chair and rush at Fukimoto who would put his foot up. Fukimoto would try to climb the top turnbuckle but would stumble and Mammoth would just smash him over the head with a chair instead. Mammoth would body slam Fukimoto onto the barbed wire bat and finish him off with a 29 Years Old on a stack of chairs for the win. The FREEDOMS Army would end up winning against Unchain 2-1 after Tomoaki Honma would defeat Kamui and Takashi Sasaki would defeat Masashi Takeda to break the tie for the FREEDOMS win.  

May 2, 2012 at Korakuen Hall, Mammoth would originally be scheduled to tag with Takashi Sasaki in the main event of the show against Jun Kasai and Tomoaki Honma. But due to Kasai's serious knee injury, the card would be switched around and Takashi Sasaki would face off against Tomoaki Honma in a singles match while Mammoth and Kamui would defend their WEW Hardcore Tag Team Titles against Masashi Takeda and Kenji Fukimoto. Mammoth would go after Fukimoto before the bell like he had done the week prior as Mammoth would swing his barbed wire bat at Fukimoto but Fukimoto would duck and drop kick Mammoth's knee causing him to drop the bat. Fukimoto would hit Mammoth across the stomach with the bat. Fukimoto would take Mammoth outside where he would begin choking Mammoth with the barbed wire bat. Mammoth would end up fighting back and getting the bat in possession as he would begin carving up Fukimoto's forehead. Mammoth would bring Fukimoto into the stands and would again begin slicing up Fukimoto's forehead. Mammoth would bring Fukimoto back in the ring where he would press a chair against Fukimoto's crotch and smash the chair into his crotch with another chair. Mammoth would grab the chair and place it around Fukimoto's neck and begin choking him with it. Mammoth would tag in Kamui who would go up against Takeda. Kamui would grab Takeda as Mammoth would try to smash Takeda over the head with it but Takeda would manage to move out of the way as Mammoth would end up slamming the chair over Kamui's head instead. Takeda would grab a chair and place it around Mammoth's neck and drop kick the chair. Mammoth would come back with a choke bomb on Takeda on the chair. Mammoth would tag in Kamui but Takeda and Fukimoto would double team Kamui and as Takeda would make the cover on Kamui, Mammoth would run in and not only make the save but pick up Takeda and deliver a suplex to him. Mammoth would grab a ladder that had been brought in the ring and place it around his neck and use it to swing and hit Fukimoto. Mammoth would place a chair over Fukimoto's neck and both Mammoth and Kamui would grab chairs and hit Fukimoto with a Double Mammoth Home Run. Mammoth would then hit Fukimoto with a Powerbomb in the corner as Kamui would come flying off the top rope with a 450 Fire Bird Splash to get the pinfall over Fukimoto and successfully defend their WEW Hardcore Tag Team Titles for the first time. 

May 20, 2012 at the Okinawa Delfin Arena, FREEDOMS would travel far down south to the island of Okinawa where they would visit the home of Super Delfin's Okinawa Pro. The show would be a mix of FREEDOMS and Okinawa Pro talent teaming and facing off against against each other. Mammoth's opponent would be Okinawa Pro's Mil Mongoose. Mammoth would be considerably bigger than Mongoose and would use it to his advantage right away by throwing around Mongoose all over the ring. Mammoth would take Mongoose outside the ring and begin choking him with a chair before throwing him back in the ring. Mongoose would make a come back as he would deliver a Superkick to Mammoth and follow that with a handspring elbow. Mongoose would end up trying to deliver a hurricanrana but would just get thrown down by Mammoth for his efforts. Mammoth would end up charging at Mongoose with a lariat and then finishing off Mongoose with the 29 Years Old for the win.

May 30, 2012 at the Tokyo Shin-Kiba 1st Ring, Mammoth and Tatsuhito Takaiwa would team up to take on the team of Brahman Shu and Brahman Kei. Takaiwa would start off the match and Mammoth would end up getting tagged in to place a chair across one of the Brahman's crotch and then smash that chair with another chair before tagging back out to Takaiwa. Takaiwa would have issues with them as he would end up getting powder thrown in his face and would get double teamed by the Brahman Brothers for a good while before finally managing to fight out and tag back in to Mammoth. Mammoth would come in for the hot tag with clotheslines although the Brahman Brothers would fight back and begin delivering kicks to the chest with Mammoth just taking them before grabbing them both by the throats and delivering a double choke slam. Mammoth would then pick up Kei to attempt to Awesome Bomb him when Shu would come back and spit black Indian ink in Mammoth's face nearly getting the win over Mammoth as a result. Kei would end up holding on to Mammoth's shoulders while Shu would bring in a street sign. Shu would go to smash Mammoth over the head with the sign but Mammoth would manage to move out of the way with Shu smashing Kei over the head with it instead. Mammoth would deliver a clothesline to Shu and quickly grab Kei and finish him off with the 29 Years Old for the win.

June 28, 2012 at the Tokyo Shin-Kiba 1st Ring, Mammoth would team up with Takashi Sasaki to take on the Unchain team of Tomoaki Honma and Masashi Takeda in a Hardcore Match in a somewhat make up match that did not happen at Korakuen Hall a month earlier with Takeda in place of the injured Kasai. Mammoth would start off brawling with Takeda outside the ring at first. Mammoth would get thrown back in the ring as Takeda would begin attacking Mammoth with a chair and smashing him over the back with it. Takeda would place the chair around Mammoth's neck and begin choking him with it. Takeda would tag in Honma who would deliver a diving headbutt right into Mammoth's shoulder. Mammoth would kick Honma low but as he would go to make the tag to Takashi Sasaki he would see that Takashi was still laying on the outside of the ring due to the attack from Honma earlier while they brawled outside. Honma would come by going low on Mammoth. Honma would tag back in Takeda who would place a chair on Mammoth's back and would then drop kick the chair right into Mammoth's back. Honma and Takeda would continue to work on Mammoth until he would finally come back with a clothesline to both of them and finally would get to tag in to Takashi Sasaki. Mammoth would get tagged back in and place Takeda in the corner where he would setup a chair against his crotch and then smash that chair with another chair. Mammoth would then place that chair over Takeda's neck and nail him with the Mammoth Home Run. Mammoth and Takashi Sasaki would then hit a Mammoth Home Run on Takeda at the same time. Mammoth would then grab a stack of chairs and place them in the ring where he would nail the 29 Years Old on Takeda on them to get the win. Mammoth afterwards would grab the mic and announce to Jun Kasai that he was entering the Death Match Tournament and call out Kasai for not being ready to compete in his own tournament. Kasai would follow that up by running the runs as fast as he could and flipping in the air to show that he would be ready for his Death Match Tournament. 

Mammoth would not speak of the injury again although it would end up being a serious neck injury. Mammoth would be force to cancel his Death Match Tournament ironically after calling Kasai previously about not being ready for the tournament physically. Toru Sugiura would end up taking his spot in the tournament against his former partner Hideki Hosaka in the first round with Hosaka getting the win.

Mammoth would remain out for several months forcing the team of Mammoth Sasaki and Kamui to officially vacate their WEW Hardcore Tag Team Titles on August 22, 2012. Takashi Sasaki and Kamui would end up challenging for the vacant titles on September 19, 2012 at the Shinjuku FACE for the Kaientai Dojo promotion against Kengo Mashimo and YOSHIYA although Mashimo and YOSHIYA would end up winning the match and winning the titles. YOSHIYA would end up retiring the following month with the WEW Hardcore Tag Team Titles disappearing following his retirement. 

December 4, 2012 at Shin-Kiba 1st Ring, Mammoth would end up making his return to the public since June following a match between Jun Kasai, Kenji Fukimoto, and Captain Abnormal against Takashi Sasaki, HIROKI and SUSUMU. Abnormal who was Masato Inabe also known as Golden Pine had debut as the Captain Abnormal and joined Kasai's Unchain group. Abnormal would continue attacking the SUSUMU following his match when Mammoth would make the save and going face to face with Abnormal. Abnormal would punch Mammoth while Mammoth would chop Abnormal's chest. Abnormal would grab Mammoth by the throat but Mammoth would kick low and grab Abnormal by the throat and deliver a choke slam. Mammoth would challenge Abnormal to a tag team match on December 25, 2012 at Korakuen Hall with Mammoth teaming up with The Winger, HIROKI, Ryuichi Sekine against Hido, Kenji Fukimoto, Captain Abnormal, and One Man Kru. Mammoth would still not look ready as he would still be in a neck brace following his injury back in June and he would be much skinnier much like the last time he had suffered a neck injury due to his car accident.

December 25, 2012 at Korakuen Hall, Mammoth would return to the ring for the first time in almost six months since his injury as he would team up with HIROKI, The Winger and Ryuichi Sekine against the team of Kenji Fukimoto, Captain Abnormal, One Man Kru, and Hido in a Scramble Bunkhouse Death Match. Both teams would start off waiting in the crowd waiting for the count down to rush and grab the barbed wire bat when Fukimoto would make an early dash for the barbed wire bat. Mammoth instead of running to the ring would rush after Hido in the crowd and begin brawling with his former FMW and WMF foe through the crowd as Hido would eventually smash Mammoth's head against the wall of the building. Mammoth would make it back to ringside and begin brawling with One Man Kru before making it in the ring to make the save for HIROKI who was about to be choke slammed by Captain Abnormal. Mammoth and Abnormal would both grab each other by the throats and try to choke slam one another with both unable to get each other off their feet. Both Mammoth and Abnormal would end up going down to one knee while still holding each other by the throat when Sekine would come in and kick Abnormal in the back. Abnormal would then exit the ring as Mammoth would set his sights on Fukimoto. Mammoth would grab Fukimoto and deliver a choke slam to setup HIROKI to deliver his Super Trance Volume 2 off the top turnbuckle but instead HIROKI would deliver a plancha off the top turnbuckle to the outside and take out Captain Abnormal. Mammoth would attempt an Awesome Bomb on Fukimoto when Hido would come in and make the save. Sekine would end up clearing Hido of the ring leaving Mammoth once again alone with Fukimoto as Mammoth would deliver a Powerbomb on the barbed wire bat and then deliver a running lariat and then finishing off Fukimoto by delivering the 29 Years Old on Fukimoto with the barbed wire bat as well for the win. Hido would rush in the ring and attempt to go after Mammoth but Mammoth would get out of the ring before Hido could do anything. Hido would then grab the barbed wire bat and begin attacking Sekine with it instead and then begin saying something to Mammoth before Mammoth would leave with a victory for his come back.

January 20, 2013 at the Shin-Kiba 1st Ring, Mammoth would team up with the FREEDOMS Army of Takashi Sasaki, HIROKI, Kamui, and SUSUMU in a Single Elimination Match against the Unchain team of Jun Kasai, Minoru Fujita, Masashi Takeda, Kenji Fukimoto, and Captain Abnormal. Eliminations would be by pinfalls, submission, and the over the top rope rule and the match would start with one member of each team going at it and then after every minute a member of one team coming in much like the War Games rules. Mammoth would end up being the last wrestler to come to the ring and he would immediately go after Captain Abnormal with Abnormal getting the better at first and attempting to pick up Mammoth for a Tombstone Piledriver but would be unsuccessful and picking Mammoth up. Mammoth would then try to setup Abnormal with a Powerbomb but would be unable to. Mammoth would then take Abnormal to the turnbuckle where he would pick him and attempt to powerbomb him over the top rope. Mammoth would only manage to throw Abnormal over the ropes with Abnormal still standing on the ring apron. Mammoth would then come rushing with a clothesline knocking Abnormal out of the ring for the first elimination. Fukimoto would go right after Mammoth and attempt to suplex him over the top rope to the outside but Mammoth would manage to turn it into a 29 Years Old but as he would go to make the pinfall several of the Unchain members would be able to make the save with Kasai coming with a double ax handle to the back of Mammoth's neck This would irritate Mammoth's already injured neck as Mammoth would begin holding the back of neck before attempting to pick up Fukimoto for an Awesome Bomb. The spot would turn ugly as Mammoth would be unable to pick up Fukimoto and his legs would give out and Mammoth and Fukimoto would both fall awkwardly as Mammoth would grab his arm in pain although would still be able to go forward with an injured shoulder. HIROKI would come in to help give Mammoth a second to recover by Superkicking Fukimoto as Mammoth would come back and pick up Fukimoto and deliver the 29 Years Old to get the pinfall elimination over Fukimoto. Mammoth would finally tag out and hold the back of his neck and shoulder in obvious pain while on the apron. Mammoth would eventually come back in as it would just be Mammoth and Kamui against Masashi Takeda as Mammoth would hand Kamui a chair as they would both go for the Mammoth Home Run on Takeda with Takeda moving out of the way and going over the top rope with Mammoth. Kamui would come after Takeda to try and knock him off the apron but would end up nailing Mammoth instead. Takeda would then run back in the ring and come after Mammoth with a spear knocking him off the apron to eliminate Mammoth. This would leave Kamui and Takeda with Takeda eventually nailing Kamui with the U-Crash for the Unchain victory. 

After the match, it would be announced that FREEDOMS would be holding a 16 man single elimination tournament to crown the first ever King of Freedoms World Champion. Each wrestler would pick 8 random numbers and the two wrestlers getting the matching number would face each other in the first round with Mammoth pulling the same card as Minoru Fujita with their first round match scheduled for February 27th with Mammoth gleeful at getting at chance at facing Fujita for the first time. 

February 27, 2013 at Shin-Kiba 1st Ring, Mammoth's first round opponent for the King of Freedoms Championship would be against Minoru Fujita. Fujita would jump Mammoth from behind right while Mammoth was coming out for his entrance. Fujita would try to get the pinfall right away as at first he would try to sunset flip Mammoth which would not work but Mammoth would try to come down on Fujita instead with Fujita moving out of the way and trying a roll up with Mammoth kicking out. Fujita would try another quick pinfall with a hurricanrana but Mammoth would manage to kick out again. Mammoth would already begin holding the back of his neck again as Fujita would elbow the back of Mammoth's neck. This would spark a fire in Mammoth who would begin chopping away at Fujita's chest several time until Fujita would get behind Mammoth and bring him down to the mat with a head lock. Mammoth would manage to get off his feet and bring Fujita off the mat with him as he would slam Fujita off the mat. Mammoth would end up end up hitting a choke bomb off the top turnbuckle on Fujita but as Mammoth would go for a choke slam, Fujita would push the referee away allowing the referee to not see Fujita kick Mammoth low. Fujita would hit a Implanter but would fail to put away Mammoth. Mammoth would charge at Fujita but Fujita would move out of the way with Mammoth hitting the turnbuckle as Fujita would roll up Mammoth with his feet on the ropes but Mammoth would manage to kick out. Fujita would begin to crawl away outside the ring on the ramp when Mammoth would catch him and bring him back in by delivering a running powerbomb from the ramp into the ring. Mammoth would then setup for the 29 Years Old but Fujita would manage to escape while in the air and although Mammoth would grab him by the throat afterwards looking for the choke slam, Fujita would be able to roll up Mammoth horizontally pinfall eliminating Mammoth in the first round of the tournament.

March 14, 2013 at the Shin-Kiba 1st Ring, Mammoth would team up with Eisa 8 and Ryuichi Sekine to face off against the team of HIROKI, SUSUMU, and Toru Sugiura. Mammoth would go up against SUSUMU in a test of strength with SUSUMU going down to the mat and bridging himself back up. Mammoth would end up just sweeping SUSUMU's leg to get him back down on the mat where he would then kick him in the stomach. Mammoth would then pick up SUSUMU and slam him before tagging in Sekine. Mammoth would be tagged back in and begin chopping Sugiura. Mammoth would put Sugiura in a Boston Crab with Sugiura having to reach the ropes to break the move. Mammoth throw Sugiura at the turnbuckle and charge with Sugiura climbing to the top and diving off onto Mammoth. Sugiura would tag in HIROKI would who would attempt a Superkick at Mammoth with Mammoth catching his leg. Mammoth would go for the choke slam but HIROKI would manage to escape the choke slam and nail Mammoth with a Superkick on the second attempt. HIROKI would with struggle would body slam Mammoth and then come off the top turnbuckle before tagging SUSUMU back in. SUSUMU would begin attacking the back of Mammoth's neck which would get him headbutted as a result. Mammoth would try to send SUSUMU into the turnbuckle with SUSUMU reversing it and delivering a drop kick to Mammoth in the chest. SUSUMU would try to cradle Mammoth up but Mammoth would manage to kick out. SUSUMU would then try to backslide Mammoth into a cover but Mammoth would just be too powerful and instead Mammoth would deliver a chokeslam to SUSUMU before tagging in Eisa 8. Mammoth would later clear the ring of HIROKI from stopping HIROKI from breaking up anymore pinfalls as Sekine would end up kicking Sugiura in the head and picking up for the win for his team.

April 3, 2013 at the Shin-Kiba 1st Ring, Mammoth would team up with HIROKI and SUSUMU to take on the Unchain team of Jun Kasai, Masashi Takeda, and Kenji Fukimoto. Unchain would attack the FREEDOMS team before the start of the match with Kasai and Mammoth brawling around ringside. Mammoth would come in against Fukimoto where he would place Fukimoto in the corner and place a chair on his crotch and smash it against another chair and tag out. Mammoth would be tagged back in as he would double clothes line Takeda and Fukimoto and begin chopping away at Takeda. Takeda would go low after Mammoth's knee and then Takeda would give Mammoth a knee to the face. Takeda would attempt to deliver a German Suplex. Takeda would give up on the attempt and charge after Mammoth instead with Mammoth grabbing a hold of him and power slamming Takeda and tagging out to HIROKI. Mammoth would not be a factor the rest of the match as Takeda would end up holding him to make sure that he would not be able to make the save as Kasai would deliver a Pearl Harbor Splash on SUSUMU to pick up the win for Unchain. 

April 21, 2013 at the Osaka Higashinari Ward Citizen Center, Mammoth and Kamui would team up for the first time since May 2, 2012 when they were WEW Hardcore Tag Team Champions before Mammoth's injury force them to vacate the titles. Mammoth and Kamui would face off against Jun Kasai and Minoru Fujita when Kasai picking up the win over Kamui after hitting a Reverse Tiger Driver on a Barbed wire Board placed on a ladder to pick up the win for the Unchain team.

May 2, 2013 at Korakuen Hall, Mammoth and Kamui would team up once again to take on the team of Keizo Matsuda and The Winger in a former WMF vs. former IWA Japan match. Mammoth and Matsuda would start by charging into each other right away with Mammoth knocking Matsuda on to the mat. They would then charge at one another again with Matsuda knocking Mammoth on the ground. Matsuda would tag in The Winger who would begin raking Mammoth's face with Mammoth responding by picking up and slamming Winger and tagging in Kamui. Mammoth would come back in with a hot tag and deliver a boot to Matsuda's face and would then go after The Winger and deliver a choke bomb and then begin to setup for the 29 Years Old with The Winger rolling Mammoth up for a cradle instead with Mammoth managing to kick out. The Winger would tag in Matsuda who would charge after Mammoth with a clothesline but Mammoth would deliver a clothesline at the same time as well. Matsuda would charge at Mammoth again but Mammoth would meet him with a clothesline knocking him down. Mammoth would then tag in Kamui and would have to make a save for Kamui by grabbing Matsuda by the throat and choke slamming him. Mammoth would then go for a choke slam on The Winger but Winger would kick Mammoth low causing Mammoth to exit the ring. Matsuda would go after Kamui with a charging a lariat but instead he would be hit in the back with a chair by Mammoth from outside the ring. This would distract Matsuda who would then be hit with a hurricanrana by Kamui to pick up for the former WEW Hardcore Tag Team Champions.

May 30, 2013 at the Shin-Kiba 1st Ring, Mammoth would team up with HIROKI and Eisa 8 against Brahman Shu, Kei, and Captain Abnormal. Shu would end up spitting in Mammoth's face right away to blind him. Mammoth would end up being tagged in against Kei and begin chopping him across the chest until Shu would come in to help with the double team which would lead to Mammoth clotheslining both of them and tagging out to Eisa 8. Mammoth and HIROKI would both be tagged in by Eisa 8 and they would both throw both Brahman Brothers at each other and then Captain Abnormal would go after them leading to HIROKI nailing Abnormal with a Superkick followed by a Mammoth choke slam on Abnormal. HIROKI would then pick up Shu for a Fireman's Carry but Kei would end up throwing powder in HIROKI's face as the Brahman Brothers would then deliver their No One's Perfect roll up on HIROKI with Kei picking up the pinfall over the FREEDOMS team.

June 27, 2013 at the Shin-Kiba 1st Ring, Mammoth would be put in the opening match with Keizo Matsuda and The Winger against the young team of Toru Sugiura, Daisuke Masaoka, and Yusaku Ito in the opening match. Mammoth would mostly destroy the younger and smaller Ito to start the match. Masaoka and Sugiura would help Ito on Mammoth with Masaoka hitting a dive on Mammoth and getting Ito to make a cover but that would not nearly enough to put Mammoth away. Mammoth would come back at Ito with a hard charging lariat for a two count. Mammoth would try to set up for the 29 Years Old but Ito would roll him up for a cradle with Mammoth having to kick out. Mammoth would come back with another lariat and then finally finish off Ito with an Awesome Bomb it what would look to be an uneventful day for Mammoth. 

But then the main event would take place between Jun Kasai, Minoru Fujita, Masashi Takeda, and Kenji Fukimoto against Atsushi Onita, Ichiro Yaguchi, Hideki Hosaka and their mystery partner which Yaguchi would reveal to be Mammoth. Mammoth would come out and officially join Onita's Jado Army and associate himself with Onita for the first time in 15 years when he was apart of Onita's Team Zero along with Hosaka in FMW. Kasai would go straight at Mammoth and they would begin to brawl outside the ring. They would make it back in the ring where Mammoth would grab a barbed wire bat and begin cutting open Kasai before Kasai would get the bat and begin slicing open Mammoth with is. They would end up brawling all in the crowd before Mammoth would make it back in the ring as the Jado Army would have Takeda swarmed with Mammoth placing a chair over Takeda and hitting the Mammoth Home Run on him. Mammoth would then pick up Minoru Fujita and body slam him off against the ropes of the ring. Kasai would end up in the ring with Onita and would grab some fluorescent light tubes when Onita would end up spitting red mist in Kasai's face. Mammoth would come in and nail Kasai with an Awesome Bomb and then hit Kasai with the 29 Years Old on the fluorescent light tubes to pick up the win. Kamui would charge the ring and hit a flying drop kick on Mammoth as Takashi Sasaki and The Winger would hit the ring as the Jado Army would retreat. Kamui would grab the mic and begin screaming about his friend Mammoth turning his back on the FREEDOMS Army and joining up with the Jado Army. Takashi Sasaki and Jun Kasai would agree to unite FREEDOMS and Unchain to go to war together against the Jado Army.

July 25, 2013 at the Shin-Kiba 1st Ring, Mammoth and Hideki Hosaka would reunite as alone a team for the first time since January 7, 2001 when they broke up in FMW after losing their WEW Hardcore Tag Team Titles back on January 7, 2001. They would face off against Tatsuhito Takaiwa and Minoru Fujita. Takaiwa's shoulder would be bandaged and both Mammoth and Hosaka would attack it during the match. Hosaka would end up taping Takaiwa's arm to the rope causing him unable to help out Minoru Fujita as Mammoth and Hosaka would hit a double Mammoth Home Run on Fujita and then Mammoth would manage to finish off Fujita with the 29 Years Old for the win.

August 21, 2013 at the Shin-Kiba 1st Ring, Mammoth would enter into the Death Match Tournament after missing out on the previous years due to injury. Mammoth's first round opponent would be Jun Kasai in a TLC Death Match as they would face off against each other in a singles match for the first time since Mammoth defended his WEW World Title by defeating Kasai on October 22, 2007 at Korakuen Hall. Mammoth would get an early start by attacking Kasai as he was entering the ring with a chair. Mammoth would take Kasai outside the ring but Kasai would end up sending Mammoth into the turnbuckle and begin brawling with him around ringside including smashing a soft drink over Mammoth's head as Mammoth would begin to bleed. Mammoth would fight back in the ring and begin using razors placed in the ring to cut open Kasai as well. Mammoth would attempt to whip Kasai into the razors placed on a table but Kasai would reverse it and send Mammoth into it instead. Kasai would then send Mammoth into the other corner where a ladder and a fluorescent light tube would be place causing Mammoth to break the light tube across his back. Kasai would end up climbing the top rope but Mammoth would manage to get to his feet and throw Kasai off the top rope. Mammoth would then bring Kasai to the entrance ramp and deliver a running powerbomb over the top ropes sending Kasai into the razors placed on a table in the ring. Mammoth would then deliver an Awesome Bomb on Kasai for two. Mammoth would then try to pick up Kasai for the 29 Years Old on the broken table with razors on it when Kasai would counter and manage to suplex Mammoth on the razors instead. Kasai would deliver his Pearl Harbor Splash on Mammoth but Mammoth would get up right away and pick up Kasai and attempt to deliver the 29 Years Old on Kasai but Mammoth would end up falling to the ground holding his shoulder his pain unable to deliver his finisher to Kasai. Mammoth would place Kasai on top turnbuckle and place a chair over his neck and nail Kasai with the Mammoth Home Run on the top turnbuckle. Mammoth would climb up the turnbuckle and try to suplex Kasai on a stack of chairs but Kasai would manage to drop down and deliver a Powerbomb on Mammoth on the stack of chairs instead. Kasai would place a chair around Mammoth's neck and hit him with his own Mammoth Home Run with Mammoth managing to kick out. Kasai would then place a stack of fluorescent light tubes across Mammoth's chest as Kasai would deliver the Pearl Harbor Splash causing them to break across Mammoth's body with Mammoth still kicking out. Mammoth would give it one last fight as both Kasai and Mammoth would exchange clotheslines with Mammoth falling down and Kasai placing his Scorpion using Mammoth's arm to cause Mammoth to finally submit to give Kasai the win. 

August 24, 2013 at the Osaka Joto-ku Citizen Hall, Mammoth would team up with One Man Kru to take on the teams of MIYAWAKI and Toru Sugiura and Brahman Kei and Dyna Mido in a Scramble Bunkhouse Three Way Tag Team Death Match. MIYAWAKI would be the first one to grab the barbed wire in the ring but Mammoth would get it from him by kicking him right in the face. Mammoth would swing the barbed wire bat but Kei would end up squirting water in Mammoth's face causing him to drop it. All the teams would brawl around ringside until Mammoth would hit the ring and nail MIYAWAKI with a lariat. MIYAWAKI would come back at Mammoth and deliver a flying drop kick but when he would attempt a suplex on Mammoth, One Man Kru would help Mammoth double suplex MIYAWAKI instead. One Man Kru would grab a hold of Dyna Mido as Mammoth would pick up the barbed wire bat. Mammoth would swing the bat with Dyna Mido getting out of the way and Mammoth hitting Kru instead. Kru would attack Mammoth with Mammoth coming back by headbutting Kru out of the ring as the team mates would brawl as Sugiura would place the barbed wire bat across Mido's throat and make him submit to Dragon Sleeper for the Toru Sugiura and MIYWAKI victory. 

August 29, 2013 at Korakuen Hall, Mammoth would team up with Hideki Hosaka and One Man Kru against the FREEDOMS Army of Minoru Fujita, The Winger, and Kamui in a Scramble Bunkhouse Death Match. The Jado Army would end up getting jumped by the FREEDOMS Army to start the match. Kamui would get his first shot at Mammoth since Mammoth had left the FREEDOMS Army. Mammoth would promptly destroy Kamui as he would smash the barbed wire bat against his chest. Mammoth and One Man Kru would work on Kamui with clotheslines followed by picking him up and bringing him to Hosaka waiting at the top of the turnbuckle to deliver a Super Powerbomb. Mammoth would then charge at Kamui with a lariat with Kamui ducking a delivering a Pele Kick and then placing the Kamui Clutch on Mammoth with Mammoth kicking out. Mammoth would then grab Kamui by the throat and nail a chokeslam and then follow that up with an Awesome Bomb on Kamui with Kamui kicking out. Mammoth would then grab the barbed wire bat and nail the 29 Years Old on the barbed wire bat to get the pinfall victory over Kamui.

September 16, 2013 at the Iwate Ichinoseki City Gym U Dome Main Arena, Mammoth would team with Atsushi Onita, Ichiro Yaguchi, and Hideki Hosaka would to face off against Jun Kasai, Kamui, Toru Sugiura and Kenji Fukimoto in a Barbed wire Board Street Fight Death Match. Mammoth would go at it with Kamui and smash him across the chest with a barbed wire baseball bat. Mammoth would then help Onita, Yaguchi, and Hosaka set up to powerbomb Sugiura into the barbed wire board. Kasai would rush to the ring to make the save but Onita would end up spitting red mist in Kasai's face before he could do anything. Mammoth, Yaguchi, and Hosaka would help Onita powerbomb Sugiura into the barbed wire board with Sugiura kicking out. Onita would then send Sugiura into Mammoth who would grab Sugiura by the throat and choke slam him into the barbed wire board with Sugiura kicking out again. Mammoth would then finish off Sugiura for good with the 29 Years Old onto the barbed wire board to give the win for the Jado Army.

September 27, 2013 at Shin-Kiba 1st Ring, Mammoth would team up with Atsushi Onita to take on the team of Takashi Sasaki and Jun Kasai in a Street Fight Death Match. Mammoth would begin brawling Kasai to start the match but Kasai would end up knocking Mammoth out while in the stands and would make it back in the ring to go at Onita with Takashi Sasaki. Sasaki would hold Onita by his arms as Kasai would grab a fluorescent light tube. Mammoth would make it back in the ring and grab the light tube from behind Kasai and take it away from him and then smash it over Kasai's head. Mammoth would then go at it with Sasaki but Sasaki would manage to end up sending Mammoth into a barbed wire board. Sasaki would then throw the barbed wire board at Mammoth. Kasai would then climb the top turnbuckle as Sasaki would setup Mammoth up when Onita would climb the apron and hit Kasai over the back with a chair. Onita would then spit green mist in Sasaki's face. Onita and Mammoth would then deliver a powerbomb to Sasaki on the barbed wire board and go for the pin with Kasai having to make the save. Onita would grab a barbed wire board as Mammoth would hold Sasaki but as Onita would swing the bat he would end up hitting Mammoth after Sasaki would manage to get away. Kasai would throw Onita out of the ring as Sasaki would take the bat and swing it across Mammoth's chest. Kasai would then climb the top turnbuckle and deliver the Pearl Harbor Splash on Mammoth with Onita grabbing the referee out of the ring to stop the count. Sasaki would then setup a fluorescent light tube across Mammoth's head and then deliver a right kick the light tube against Mammoth's head causing it to shatter as Sasaki would put away Mammoth for the FREEDOMS win.

October 6, 2013 at the Osaka Joto Kumin Hall, Mammoth would participate for the B-168 group which is a sub promotion of Secret Base promoted by Dyna Mido. The show would be held to celebrate Tetsuhiro Kuroda's 20th Anniversary of debuting in FMW back in October 1993. Mammoth would team up with partner Hideki Hosaka against the former FMW Brass Knuckles Tag Team Champion team of Masato Tanaka and Tetsuhiro Kuroda. The match would be a similar match from FMW as Tanaka and Kuroda would deliver their double frog splashes together on Mammoth and Hosaka before Tanaka would finish off Hosaka with a Sliding D for the win. 

October 18, 2013 at the Tokyo Shinjuku FACE, Mammoth would team up with fellow Jado Army members Hideki Hosaka and Kenichi Fujii against the FREEDOMS Army of Takashi Sasaki, Kamui, and Toru Sugiura in a Street Fight for an Atsushi Onita promoted show. Sasaki would end up placing the Sharpshooter on Fujii to make him tap out for the FREEDOMS win. Mammoth would end up meeting with former FMW wrestlers Masato Tanaka and Megumi Kudo and taking a picture with the two backstage following the show.

October 30, 2013 at the Shin-Kiba 1st Ring, Mammoth would team up with Hideki Hosaka against Takashi Sasaki and Kamui in a Hardcore Match. Mammoth and Sasaki would go at it exchanging lariats to one another at the same time with Mammoth being the one to knock Sasaki off his feet first. Mammoth would then grab Sasaki by the throat and deliver a chokeslam. Mammoth would then place a chair across Sasaki's neck but as Mammoth was attempting to deliver the Mammoth Home Run out of nowhere Kamui would come off the top turnbuckle and deliver a kick to the chair in Mammoth's face. Sasaki would then take the chair around his neck and place it over Mammoth's neck as both Sasaki and Kamui would deliver a double Mammoth Home Run to Mammoth for the cover. Hosaka would be late and only manage to grab the referees leg to stop the three count. Kamui would come at Mammoth with a running chair shot and then climb the top rope and deliver a Swanton Bomb on Mammoth with Mammoth having to kick out. Kamui would climb the top rope again but Hosaka would come at Kamui and hit him from behind with a barbed wire bat. Hosaka would deliver a hurricanrana on Kamui and then Mammoth would pick up Kamui and bring him to Hosaka to deliver a Super Powerbomb to Kamui. Sasaki would end up making the save for Kamui but would then get thrown out of the ring again leaving Kamui alone with Mammoth. Mammoth would nail Kamui with an Awesome Bomb but would manage to kick out. Mammoth would then setup for the 29 Years Old and Kamui would manage to escape from it and deliver the Pele Kick to the back of Mammoth's head. Mammoth would come back with a hard lariat at Kamui and then finally manage to finish him off with the 29 Years Old for the win. Sasaki and Kamui afterwards would begin talking to Mammoth about leaving the Jado Army with Mammoth looking back at them. Hosaka would have to come back and grab Mammoth by the neck and pull him away as they would leave together. It would turn out to be the last FREEDOMS vs. Jado Army match as FREEDOMS would end their working relationship with Onita. 

November 4, 2013 at the Yokohama Radiant Hall, Mammoth would take on Daisuke Masaoka in a singles match with Masaoka jumping Mammoth before the start of the match and delivering an Asai Moonsault outside the ring into the crowd. Masaoka would begin chopping Mammoth outside the ring which would turn into a mistake as Mammoth would easily overpower him. Mammoth would attempt to whip Masaoka into the crowd of chairs but Masaoka would reverse it and send Mammoth instead. Masaoka would again make the mistake of trying to strike Mammoth down which would only result in him getting chopped down to the mat. Mammoth would then bring Masaoka to the outside where he would smash him over the head with an umbrella before bringing him back in the ring. Mammoth would continue to play with Masaoka until going for an Awesome Bomb. Masaoka would manage to turn it into a reverse cradle but Mammoth would kick out. Masaoka would then try a La Magistral but Mammoth would be too big and stand up with Masaoka across his back and nail Masaoka with a Death Valley Bomb. Mammoth would deliver the choke slam and then finish off Masaoka with the 29 Years Old for the win. 

November 28, 2013 at the Shin-Kiba 1st Ring, Mammoth would come out sporting a new look. He would shave his head, grow a goatee, and instead of his Atsushi Onita t-shirt that he had been wearing since joining the Jado Army he would instead wear a King James 23 jersey shirt. Mammoth would face off against Kamui after actively trying to get him to rejoin the FREEDOMS Army the previous month with the FREEDOMS vs. Jado Army feud now over with Atsushi Onita no longer being booked by the promotion. Mammoth would start off brawling with Kamui in the crowd before bringing him back in the ring. Mammoth would go for a choke slam but Kamui would flip Mammoth down to the mat with him retreating to the outside. Kamui would then deliver an Asai Moonsault to the outside. Mammoth would end up sending Kamui to the corner post but would miss a charging clothesline and his arm would hit the turnbuckle instead. Kamui would begin focusing on Mammoth's injured arm and begin smashing it with a chair before throwing Mammoth back in the ring. Kamui would come off the top turnbuckle with a flying dropkick right at Mammoth's arm and then follow that up by placing him in the Fujiwara Armbar. Mammoth would get his foot on the rope causing a break. Kamui would charge at Mammoth but Mammoth grab Kamui by the throat. Before Mammoth could even try a chokeslam Kamui would continue striking Mammoth's injured arm resulting in Mammoth headbutting Kamui and knocking him to the mat. Mammoth would charge at him with a running clothesline with Kamui delivering a Pele Kick to Mammoth's arm and then placing him a armlock. Mammoth would attempt to pick up Kamui off the ground but before he could Kamui would smack Mammoth across the face hard and then deliver a Pele Kick to the head before rolling him with an inside cradle for two. Kamui would climb the top turnbuckle but Mammoth would get him and deliver a superplex. Mammoth would then eventually nail Kamui with an Awesome Bomb and then finish him off with the 29 Years Old for the win. Mammoth would begin to leave when Toru Sugiura would come out and not allow Mammoth to leave until he rejoined FREEDOMS. Toru Sugiura would push Mammoth back in the ring and get chokeslammed by Mammoth as a result. Sugiura would still manage to grab his leg before he could leave and then Kamui would grab the other leg. Mammoth would grab the mic and announce to them that he would rejoin the FREEDOMS Army to Toru Sugiura and Kamui's excitement. 

December 25, 2013 at Korakuen Hall, Mammoth would once again face off against Kamui this time in a Street Fight Death Match. As Mammoth was entering the ring he would be met by a chair to the head thrown at him by Kamui. Mammoth would roll to the outside where Kamui would attempt a baseball slide when Mammoth would catch him by his legs and throw him into a stack of chairs in the corner of the ring. Mammoth would take Kamui into the crowd where he would attempt a 29 Years Old with Kamui managing to get out of it and deliver a DDT. Kamui would then deliver a Moonsault onto Mammoth. Kamui would bring Mammoth back in the ring and throw a chair right at Mammoth's injured arm from the previous month. Kamui would grab a barbed wire baseball bat and begin smashing it across Mammoth's chest. Kamui would then climb the turnbuckle while holding Mammoth's arm and put on a Fujiwara Armbar while draped against the ropes off the top turnbuckle. Kamui would let go and climb to the top with Mammoth getting up and delivering a superplex to Kamui that would fling him across the ring. Mammoth would hit a chokeslam on Kamui but when he would go at him with a clothesline Kamui would manage to roll him up for a two. Kamui would then nail Mammoth's arm with a drop kick and then pick up a chair and smash it over his arm. Kamui would then place the chair over Mammoth's arm and place him in a Fujiwara Armbar with the chair over Mammoth's arm and as Mammoth was about to get out of the move he would be met with a hard slap to the face by Kamui. Kamui would then go for a hurricanrana but during the pin count Mammoth would manage to pick up Kamui with and drive him down with a Powerbomb. Mammoth would then grab a stack of chairs and hit Kamui with the 29 Years Old on the chairs with Kamui managing to kick out. Mammoth would then hit Kamui with a Mammoth Home Run and then grab the bat and place it across Kamui's throat in a W*ING Style Camel Clutch to force Referee Stoppage to give Mammoth another win over Kamui.

January 8, 2014 at the Shin-Kiba 1st Ring, Mammoth would enter the King of Freedom Scramble Tag Team Tournament to crown the first King of Freedom Tag Team Champions with Toru Sugiura. Their tag team would be called the Mammoth Busters and they would be entered into the B Block. Mammoth and Sugiura's first opponents would be Great Kojika and The Winger. Mammoth would start off with Kojika as they would tie up with Mammoth going easy on Kojika at first until Kojika would manage to get Mammoth in the ropes where he would start laying it on Mammoth. Mammoth would fight back with punches and then as soon as he would pick up Kojika for a body slam, The Winger would come in to make the save for Kojika and then tag in. Mammoth would tag out to Sugiura who would be in the match a majority of the time and when Sugiura would finally make the tag the referee would not see it and not allow Mammoth in the ring. Sugiura would finally end up making the tag to Mammoth in the referees sight and Mammoth would come in and try an Awesome Bomb on Kojika that The Winger would make the save on. Mammoth would then attempt a choke slam on Kojika who would end up hitting Mammoth down low. Kojika would tag in Winger who would charge at Mammoth but receive a choke bomb by Mammoth before tagging back in Sugiura. Mammoth would begin brawling outside with Kojika as Winger and Sugiura would go at it in the ring but Kojika outside would end up grabbing Sugiura's leg making him trip and Winger would use a leg roll up to get the win over Sugiura. 

January 19, 2014 at the Yokohama Radiant Hall, Mammoth would team up with FREEDOMS members Takashi Sasaki and Jun Kasai for the first time since feuding with them as a part of the Jado Army months earlier as they would take on the team of Kenichiro Arai, Brahman Shu, and Brahman Kei with the start of the match seeing the Brahman Brothers throw powder in the FREEDOMS team face at the start of the match and Kei rolling up Kasai in just 6 seconds for the pinfall. Kasai would pull out a phone that had taken a picture of the Brahman Brothers cheating and the referee would restart the match which would end with Kasai nailing his Pearl Harbor Splash on Kei for the win.

February 2, 2014 at the Osaka Dotonbori Arena, Mammoth and Sugiura would team up for their second tag team tournament match as they would take on the team of Kenichiro Arai and Minoru Fujita. Mammoth would end up getting a small bit of revenge as Fujita had eliminated Mammoth last year in the tournament for the King of Freedoms World Title in the first round. This time Mammoth would end up putting away Fujita with the 29 Years Old for the win and giving the Mammoth Busters their first two points in the tournament.

February 13, 2014 at the Shin-Kiba 1st Ring, Mammoth and Sugiura would team up against the Guts World team of Daisuke and Tatsuhiko Yoshino. Yoshino would try chopping Mammoth but would end up getting a hard chop by Mammoth causing him to fall to the mat. Yoshino would keep trying to chop away at Mammoth but would get a headbutt as a result. Yoshino would come back with a drop kick at Mammoth and tag in Daisuke who would come off the top rope with a flying dropkick. Daisuke would try striking Mammoth across the chest and he would get a headbutt for his troubles as well. Daisuke would come back and manage to body slam and then deliver a Frog Splash on Mammoth for two. Yoshino would tag in Daisuke who would deliver a high kick to Mammoth's head for a two. Daisuke would charge but get caught in Mammoth's arm and deliver a slam and make the tag to Sugiura. Mammoth would come back in to help Sugiura as Sugiura would throw Daisuke and Yoshino into the turnbuckle. Mammoth would also throw Sugiura into the turnbuckle with them and splash into all three of them. Mammoth would then pick up Sugiura in the air and drop him on Yoshino with Daisuke making the save. Mammoth would charge at Yoshino for a clothesline but Yoshino would roll him up for a two count. Mammoth would then grab Yoshino from behind and deliver a German Suplex and then nail him with a lariat and then finish Yoshino off with the 29 Years Old for the win and 4 points in the tournament.

March 9, 2014 at the Nagoya Sports Center, Mammoth and Sugiura would team up for their final scheduled tag team tournament match against the Brahman Brothers. The result would determine on who would advance in the B Block to face off against the A Block team of Takashi Sasaki and Tatsuhito Takaiwa. The Mammoth Busters would end up pulling out the win after Mammoth would hit the 29 Years Old on Kei for the win and 6 points enough to advance to the semi-finals of the tournament. 

March 13, 2014 at Korakuen Hall, Mammoth and Sugiura would face off against Takashi Sasaki and Tatsuhito Takaiwa in the semi-finals of the King of Freedom Tag Team Tournament with the winner facing off against Great Kojika and The Winger in the finals. Takaiwa would end up finishing off Sugiura with the Death Valley Bomb to put him away and officially eliminate the Mammoth Busters from the tournament. Great Kojika and The Winger would end up defeating Takashi Sasaki and Tatsuhito Takaiwa in the finals of the tournament to be crown the first King of Freedoms Tag Team Champions.

April 3, 2014 at Shin-Kiba 1st Ring, Mammoth and Sugiura would team up again following the tag team tournament and they would end up defeating the team of SUSUMU and Daisuke Masaoka after Mammoth would put away SUSUMU with the 29 Years Old to give the Mammoth Busters one last victory. 

May 2, 2014 at Korakuen Hall, Mammoth would team up with the heavyweight team of Tatsuhito Takaiwa and Kikujiro Umezawa against the junior heavyweight team of HIROKI, SUSUMU, and Daisuke Masaoka. The juniors use their speed right away as would all drop kick Umezawa at the same time. Masaoka would then come off the top rope with a flying drop kick on Mammoth where as SUSUMU would deliver a hurricanrana on Takaiwa. HIROKI, Masaoka, and SUSUMU would all come off the top rope at the same time hitting Takaiwa with splashes. SUSUMU would then try to finish off Takaiwa but instead would be met with a Death Valley Bomb by Takaiwa for the win.

May 6, 2014 at the Yokohama Radiant Hall, Mammoth would team up with Jun Kasai to take on the team of Takashi Sasaki and GENTARO in a two out of three falls match. It would be just GENTARO's second match back from his stroke that had kept him out of action for 21 months. The first fall would come just a little after five minutes GENTARO would manage to hook Mammoth in the GENTARO Clutch for the pinfall and 1-0 lead over Mammoth and Kasai. Kasai would tie it up with a Reverse Tiger Driver on Sasaki for the second fall that to make it 1-1. The third and final fall would have Mammoth Sasaki choke slam GENTARO and then finish him off with the 29 Years Old for the pin and 2-1 fall win over the Akrangers team. 

May 28, 2014 at the Shin-Kiba 1st Ring, Mammoth would team up with fellow FREEDOMS member Kenji Fukimoto to take on the BJW Tag Team Champions of Isami Kodaka and Yuko Miyamoto in a Hardcore Match. Although Mammoth had helped train Miyamoto and back in WMF use to destroy Kodaka when he was a young boy they had become much more established over the years and would defeat Mammoth and Fukimoto after Kodaka would get a European Clutch to pin Fukimoto for the win.

June 25, 2014 at Shin-Kiba 1st Ring, Mammoth would team up with Tatsuhito Takaiwa against the smaller team of Kamui and Kenji Fukimoto with Mammoth putting away his last months tag team partner in Fukimoto with the 29 Years Old for the win.

Mammoth's next scheduled Shin-Kiba 1st Ring show will be on July 24, 2014 where he will team with Takashi Sasaki, GENTARO, and The Winger as they will take on the team of HIROKI, Toru Sugiura, Kenji Fukimoto, and Daisuke Masaoka in a older vs. younger Single Elimination Match one day
after he turns 40 years old.

I have gotten the chance to see Mammoth compete live four times. I got the chance to see him return to the ring after his car accident that caused him to be out of the ring for 15 months on June 21, 2010. I also got the opportunity to see him live on June 28, 2012 and get his autograph right before he would take 6 months off due to a neck injury, and finally I got to see him turn against the FREEDOMS Army and join the Jado Army live on June 27, 2013 which was one of the highlights of going to Japan that year. I have always really enjoyed Mammoth Sasaki throughout the years as I have got to see him grow from when he started out in FMW seventeen years ago. 

Mammoth's pro-wrestling future looks to just be what it has been with FREEDOMS for awhile. Because of his long tenure in pro-wrestling and size he will always be pushed as a top guy in the small company but he does not have the close friendship with President Takashi Sasaki like some of the other wrestlers do so he will never really be a top guy for the promotion. That and with him about to be 40 and having a full time job and not taking any other bookings besides for FREEDOMS seems to show Mammoth is complacent with where he is with his life and with his pro-wrestling career.

Mammoth Sasaki's Title History

WEW Hardcore Tag Team Championship w/ Hideki Hosaka

Defeated: Kintaro Kanemura & Willie Takayama 4/25/00
Lost to: The Samoans 6/21/00

WEW Hardcore Tag Team Championship w/ Hideki Hosaka

Defeated: The Samoans 7/28/00
Lost to: Jado & Gedo 9/21/00

WEW Hardcore Tag Team Championship w/ Hideki Hosaka

Defeated: Supreme & Homeless Jimmy 11/12/00
Lost to: GOEMON & Onryo 1/7/01

WEW Hardcore Championship

Defeated: Kintaro Kanemura 4/1/01
Lost to: Kintaro Kanemura 5/5/01

WEW Tag Team Championship w/ Mr. Gannosuke

Defeated: GOEMON & Onryo 9/5/01
Lost to: Hayabusa & Tetsuhiro Kuroda 10/9/01

WEW Tag Team Championship w/ Mr. Gannosuke

Defeated: Biomonster DNA & Dr. Luther 11/23/01
Vacated on 11/23/01

BJW Tag Team Championship w/ Shadow WX

Defeated: Abdullah Kobayashi & Daisuke Sekimoto 1/27/06
Lost to: Daisuke Sekimoto & Yoshihito Sasaki 12/3/06

WEW World Heavyweight Championship

Defeated: Toru Yano 9/23/07
Lost to: Tomohiro Ishii 7/12/08

BJW Tag Team Championship w/ Daisuke Sekimoto

Defeated: Kengo Mashimo & Madoka 7/13/08
Vacated on 3/12/09

WEW Hardcore Tag Team Championship w/ Kamui

Defeated: Kengo Mashimo & Ryuichi Sekine 10/27/11
Lost to: Brahman Shu & Brahman Kei 1/9/12

WEW Hardcore Tag Team Championship w/ Kamui

Defeated: Brahman Shu & Brahman Kei 2/11/12
Vacated on 8/22/12

King of Freedom Tag Team Championship w/ Kamui 

Defeated Buffalo & Susumu Yuya 5/1/15 Tokyo
Lost to: Takashi Sasaki & GENTARO 7/26/15

Last updated: 7/10/14