History
Chankonabe was developed by sumo stables in Tokyo's Ryogoku district through the late 19th century as the standard diet to bulk up wrestlers: protein-rich, vegetable-heavy, served in vast pots that fed a stable of 15+ men at one sitting. The base broth is shio (salt) or shoyu (soy); the contents rotate seasonally but always feature tsukune (chicken meatballs), tofu, vegetables and noodles or rice for the finale. The sumo tradition is chicken-only on competition days (the wrestler stands on two legs, not four), making beef and pork tournament-day taboo. Several Ryogoku restaurants are run by retired wrestlers and serve the authentic stable-recipe chankonabe.