The Japan Sumo Association is also headquartered in Tokyo at the Ryōgoku Kokugikan sumo arena where three official sumo tournaments are held annually (in January, May, and September).
Asosiasi Sumo Jepang juga bermarkas di Tokyo, yaitu di arena sumo Ryōgoku Kokugikan, tempat tiga kejuaraan sumo resmi diadakan tiga kali setahun (pada bulan Januari, Mei, dan September).