Japanese Chanko Nabe Sumo Wrestler Hotpot and Ryōgoku Stable Food Culture

Chanko nabe (ちゃんこ鍋 — stable hotpot) is the high-calorie, protein-dense hot pot that forms the dietary cornerstone of professional sumo wrestler training culture. The dish originated in sumo stables (heya) in the Edo period and has become a distinct culinary tradition centred around Tokyo's Ryōgoku district — the sumo heartland — where retired wrestlers frequently open chanko restaurants. The dish's philosophy directly reflects sumo's dietary requirements: maximum calorie density in a format that encourages large-volume consumption (a single practice session requires 3,000–5,000 calories). Chanko nabe is technically flexible — there is no single recipe, only the principle of protein-rich stew with vegetables in dashi-based broth. Chicken is the canonical protein (sumo wrestlers traditionally avoid beef, as standing on four legs represents the losing position in a bout — chickens stand on two legs). The standard version: whole chicken, chicken meatballs (tsukune), firm tofu, udon noodles added at the end, cabbage, carrot, gobo, and mushrooms in a soy-sake-dashi broth. The shime (締め — finishing course) of chanko is either udon or rice porridge (zōsui) cooked in the remaining broth — the most flavour-concentrated component of the meal.