During a sumo tournament, the wrestler Musashikuni Mamu (1 m 85 and 145 kg) managed to knock his opponent Tomisakae Ryutaro (1 m 68 and 110 kg) in a second. Early in the fight, Musashikuni has produced a "kachi-age" (blow to the jaw allowed to sumo) with his right forearm. His opponent fell KO on the ground. He tried to get up several times, but without success.