Ryōgoku Kokugikan (両国国技館 Ryōgoku Kokugi-kan), also known as Ryougoku 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 name kokugikan. The current building was opened in 1985 and has a capacity of 13,000 people. It is mainly used for sumo wrestling tournaments (honbasho) and hosts the Hatsu (new year) honbasho in January, the Natsu (summer) honbasho in May, and the Aki (autumn) honbasho in September. It also houses a museum about sumo. The venue is also used for other indoor events, such as boxing, pro wrestling, and music concerts. In past years, it has hosted the finals of the G1 Climax, an annual tournament held by New Japan Pro Wrestling. On July 4th, 2015, World Wrestling Entertainment hosted its event The Beast in the East in the hall. This event aired live on the WWE Network.
Reference : Ryōgoku Kokugikan – Wikipedia, the free encyclopedia
The center of the wrestlers is Hakuhō of yokozuna.