Sumo in the browser: two heavy bodies gripping and pushing each other inside a ring 4.55 m across, where balance and the tawara are the whole game. When a bout ends the winning technique is named from the Japan Sumo Association's published list of 82 kimarite and 5 non-technique results, transcribed from the Association's own page and cross-checked against two Wikipedia editions. The ring, the winning conditions, shini-tai and kabai-te, the four-minute limit and the eight kinjite are sourced; the body dynamics are reconstructed and labelled as such throughout. An independent reimplementation, not affiliated with the Japan Sumo Association; all opponents are invented. Runs entirely client-side - no model, no credits, no network calls.

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