Founded in 1627, this shrine is famous as the birthplace of the sumo tournament. Around the back of the main building is the yokozuna stone, carved with the names of each of these champion wrestlers. Near the entrance are the two gilded, jewel-studded mikoshi, used in the Fukagawa Hachiman festival in mid-August; the larger one weighs 4.5 tonnes.
A flea market takes place here on the 15th and 28th of most months, from around 8am to sunset.