Judo, which means “gentle way” in Japanese, is a martial art created in Japan by Jigoro Kano in 1882. … Judo, Japanese jūdō, system of unarmed combat, now primarily a sport. The rules of the sport of judo are complex. The objective is to cleanly throw, to pin, or to master the opponent, the latter being done by applying pressure to arm joints or to the neck to cause the opponent to yield. Judo. A judo match takes place on a mat with three referees officiating. The objective is to score an ippon, one full point, which can be achieved in four ways and immediately ends the match.