Ryogoku (両国) is the home of sumo in Tokyo. The Ryogoku Kokugikan stands close to the Sumida River and in the backstreets between Ryogoku and Kiyosumi-Shirakawa Station you can find many of the sumo stables where the wrestlers train.
Things to Do
Museum containing a collection of over 150 items including swords designated as national treasures. There is an explanation of the manufacturing process and an archives room that holds 1,500 historical documents on swords.