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 »
Home of the powerful Maeda family who governed the region for 280 years from the late 16th century up until the end of the Edo period. Since its early days, the castle has been pivotal to Kanazawa and the city has developed around it.