Ryogoku Kokugikan (両国国技館, Ryōgoku Kokugikan) is an indoor sporting arena that hosts the three sumo tournaments that take place in Tokyo each year (in January, May, and September).
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Location
Ryōgoku Kokugikan, 1 Chome-3-28 Yokoami, Sumida, Tokyo 130-0015 « Google Maps »
Three restored Showa period houses re-opened as a small commercial initiative with a beer hall and restaurant, olive oil store, and bakery. Very charming little place.