The exhibits were mainly sumo artifacts from the collection of the Museum's founding curator, Tadamasa Sakai. Its mission is to underline the role of Sumo as the Japanese national sport through collecting and maintain artifacts as well as to support historical studies. In January 1985, it opened in larger quarters in the Ryogoku Kokugikan. Facilities include more than 150 square meters to exhibition space, a library, a study, and over 160 additional square meters of storage space for items not on display. Friday Closed on weekends, national holidays, before and after New Year's Day, and other occasional holidays.
Admission is free.