Beast the Barbarian 1/7/90 Tokyo Korakuen Hall
*Recognized as first WWA Brass Knuckles Heavyweight Champion.

Atsushi Onita 1/7/90 Tokyo Korakuen Hall

Gregory Veritchev 2/27/91 Tokyo Korakuen Hall
*WWA Brass Knuckles Heavyweight Title becomes WWA Martial Arts Heavyweight Title.

Atsushi Onita 5/29/91 Tokyo Ota Ward Gym

Big Titan 1/15/92 Kobe World Hall

Tarzan Goto 1/30/92 Osaka Prefectural Gym # 2

Leon Spinks 3/25/92 Tokyo Korakuen Hall

Atsushi Onita 5/24/92 Tokyo Ariake Coliseum 

The Sheik 6/25/92 Sapporo Nakajima Sports Center
*Vacated due to injury

Tiger Jeet Singh 8/92 
*Rewarded by The Sheik

Atsushi Onita 9/19/92 Yokohama Stadium
*Replaced by FMW Brass Knuckles Heavyweight Title.

Atsushi Onita 8/22/93 Osaka Nishnomiya Stadium
*Defeated Mr. Pogo to become first FMW Brass Knuckles Heavyweight Champion.

Mr. Pogo 1/6/94 Tokyo Korakuen Hall

Atsushi Onita 9/7/94 Sapporo Nakajima Sports Center

Mr. Pogo 1/21/95 Sendai Miyagi Sports Center

Atsushi Onita 5/4/95 Nagoya Aichi Budokan
*Vacated title on 5/5/95 after Retirement.

Hayabusa 6/27/95 Tokyo Korakuen Hall
*Defeated Hisakatsu Oya, and then vacated on 6/27/95 due to injury.

The Gladiator 9/26/95 Tokyo Korakuen Hall
*Defeated Hayabusa in the finals of a 8 Man Round Robin Tournament and later vacated due to injury.

Super Leather 2/23/96 Tokyo Korakuen Hall
*Defeated Hisakatsu Oya for vacant title.

The Gladiator 5/27/96 Fukuoka Hakata Star Lanes
* Title is unified with FMW Independent Heavyweight Title after defeating W*ING Kanemura on 12/11/96.

Masato Tanaka 9/28/97 Kawasaki Stadium

Mr. Gannosuke 1/6/98 Tokyo Korakuen Hall

Hayabusa 4/30/98 Yokohama Bunka Gym

Kodo Fuyuki 11/20/98 Yokohama Bunka Gym
*Vacated on 5/18/99 due to injury

Yukihiro Kanemura 5/18/99 Tokyo
*Rewarded by FMW Commissioner Kodo Fuyuki

Hayabusa 8/23/99 Tokyo Korakuen Hall
*FMW Brass Knuckles Heavyweight Championship is retired on 8/25/99.