Masahiko Kimura
Photo: published by 学習研究社 · Public domain · Wikimedia Commons
JudoGrappling & BJJ

Masahiko Kimura

The judoka whose armlock carries his name

Tale of the tape
Born
September 10, 1917, Kumamoto, Japan
Died
April 18, 1993 (aged 75)
Nationality
Japan
Height
170 cm (5′7″)
Style
Throw-and-submit grappler
Weight
Open
Active
1935–1959

The record

13 years unbeatenUndefeated in competition for 13 years after his first All-Japan title in 1937 (judoinfo biography); Wikipedia records no losses from 1936 to 1950.

Olympic Games
World Championships

Pre-Olympic era: All-Japan champion 1937, 1938, 1939 and co-champion 1949

The story

Masahiko Kimura took up judo at nine in Kumamoto and at 18 became the youngest fifth dan in Kodokan history. After four defeats in 1935 he nearly quit, then drilled osoto gari against a tree until training partners asked him not to use it. He won the open-weight All-Japan Championships in 1937, 1938 and 1939, the first to win three in a row, shared the 1949 title with Takahiko Ishikawa, and by most accounts did not lose a competitive match for 13 years. In 1951 he fought Hélio Gracie under submission rules in Rio and broke his arm with gyaku ude-garami until Gracie's corner stopped it; grapplers now call the lock the kimura. He later wrestled professionally and taught at Takushoku University, where his pupils included Canada's 1964 Olympic silver medallist Doug Rogers.

Signature weapons

Tap a technique with an arrow to learn how it works.

Titles
  • All-Japan champion (1937, 1938, 1939; shared 1949)
  • Tenran-shiai champion (1940)
  • All-Japan Collegiate champion (1935)
Honours
  • The kimura armlock (gyaku ude-garami) is named after him

Defining matches

  1. 1937WIN
    vs Masayuki Nakajima (All-Japan final, kuzure-kami-shiho-gatame)
  2. 1949DRAW
    vs Takahiko Ishikawa (All-Japan final; declared joint champions)
  3. 1951WIN
    vs Hélio Gracie (Rio; gyaku ude-garami broke Gracie's arm and his corner threw in the towel)
  4. 1954LOSS
    vs Rikidōzan (pro-wrestling title match that turned into a real fight; knocked out)
  5. 1959WIN
    vs Waldemar Santana (grappling match in Rio, gyaku ude-garami)
Steal this

The kimura is judo's ude-garami: when an opponent pushes or posts an arm to escape a pin, catch the wrist, figure-four the arm and turn it behind their back. Kimura's throw, pin, then submit-on-the-escape pattern is the core of judo for MMA and submission grappling.

More Judo legends

Facts checked September 2026 against en.wikipedia.org, judoinside.com, judoinfo.com and ja.wikipedia.org. Photo: published by 学習研究社, Public domain, via Wikimedia Commons, shown in black and white with a halftone effect. The Hall of Fame is editorial; it doesn't imply Masahiko Kimura endorses Satori Fight Club.