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

Atsushi Onita 1/17/90 Tokyo

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

Atsushi Onita 5/29/91 Tokyo

Big Titan 1/15/92 Kobe

Tarzan Goto 1/30/92 Osaka

Leon Spinks 3/25/92 Tokyo

Atsushi Onita 5/24/92 Tokyo

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

Tiger Jeet Singh 8/92 
*Rewarded by The Sheik

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

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

Mr. Pogo 1/6/94 Tokyo

Atsushi Onita 9/7/94 Sapporo

Mr. Pogo 1/21/95 Sendai

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

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

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

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

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

Masato Tanaka 9/28/97 Kawasaki 

Mr. Gannosuke 1/6/98 Tokyo 

Hayabusa 4/30/98 Yokohama 

Kodo Fuyuki 11/20/98 Yokohama 
*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
*FMW Brass Knuckles Heavyweight Championship is retired on 8/25/99.