The uniforms must also be worn with a belt. Female judokas wear a white t-shirt ... (Grabbing the opponent's judogi is a legal move in judo.) During a match, one competitor wears white, while their ...
He also devised judo’s “obi” belt-ranking system. In Japan at the time, there were only two colors, black and white, used for practitioners. But Kawaishi introduced seven belt colors ...
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