Born: October 28, 1860
Died: May 4, 1938
Biography: Kanō Jigorō was the founder of judo. Judo was the first Japanese martial art to gain widespread international recognition, and the first to become an official Olympic sport. Pedagogical innovations attributed to Kanō include the use of black and white belts, and the introduction of dan ranking to show the relative ranking between members of a martial art style.