SUMO DAY: See What the Arena Is Telling You

Field notes

The companion divides its material into 30 “Understand It” cards, 20 “Watch Like a Local” lenses, and 10 “Jackpot Moments.” The free sample includes explanations of salt throwing, shikiri, kensho banners, the ring-entering ceremony, a mono-ii, and the broom used after a bout. The page also describes eight arena shortcuts and says the paid home reaches an answer in two taps or fewer. Its guides use first-hand Ryogoku photographs and cite Japan Sumo Association materials for fact review.