Japan's national sport is SUMO, a form of wrestling that has been practiced in Japan for centuries. It is a highly ritualized sport, with strict rules and traditions that have been passed down through generations. SUMO wrestlers compete in a circular ring, wearing only a mawashi, a belt made of thick cloth. The goal of the sport is to force the opponent out of the ring or to make them touch the ground with any part of their body other than the soles of their feet. SUMO is a popular spectator sport in Japan, and it is also an important part of Japanese culture.