Ryōgoku Kokugikan, also known as Ryōgoku Sumo Hall, is an indoor sporting arena located in the Yokoami neighborhood (bordering to the Ryōgoku neighborhood) of Sumida, one of the 23 wards of Tokyo in Japan, next to the Edo-Tokyo Museum. It is the third building built in Tokyo associated with the namekokugikan. The current building was opened in 1985 and has a capacity of 11,098...