Masahiko Kimura (木村 政彦, Kimura Masahiko, September 10, 1917 – April 18, 1993) was a Japanese judoka and professional wrestler who is widely considered one of the greatest judoka of all time. He won the All-Japan Judo Championships three times in a row for the first time in history and had never lost a judo match from 1936 to 1950. An author said," In the history of judo, no one is the strongest before Kimura and no one is the strongest after Kimura." He has often been described as the strongest judoist in history. In submission grappling, the reverse ude-garami arm lock is often called the "Kimura", due to his famous victory over Brazilian jiu-jitsu founder Hélio Gracie. In the Japanese professional wrestling world, he is known for the controversial match he had with Rikidōzan.