Judo was originally created in 1882 by Jigoro Kano as a physical, mental, and moral pedagogy in Japan. It is generally categorized as a modern martial art, which later evolved into a combat and Olympic sport.
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.
Techniques are generally intended to turn an opponent’s force to one’s own advantage rather than to oppose it directly. A ritual of courtesy in practice is intended to promote an attitude of calm readiness and confidence. The usual costume, known as jūdōgi, is a loose jacket and trousers of strong white cloth. White belts are worn by novices and black by masters, with intermediate grades denoted by other colours. Jūdōka (students of judo) perform the sport with bare feet.