Japan Sumo Association (Nihon Sumou Kyoukai) links: current rankings Japanese/English; yobidashi (ushers & attendants) Japanese/English; gyoji (referees) Japanese/English; oyakata (coaches) Japanese/English; heya (training stables) Japanese/English. NSK homepage in English; retirees - Japanese only but only requires hiragana knowledge; changes of name - Japanese only but only requires hiragana knowledge.
SumoDB has results, rankings and other records going back over a century. (Ever wanted to know which yokozuna scored 7-8, for instance?) Essential site for stats-lovers who want to know head to head records, how far people have been promoted demoted based on rank and record, and who holds what elder stock.
Wikipedia has a list of winning techniques like oshidashi, yorikiri, etc, a sumo glossary, a list of yokozuna and ozeki, the heaviest grand sumo competitors ever, and an English-language biography and tournament record for just about every sekitori there is or was.
Fred Pinkerton’s promotion/demotion charts show who’s moving where in top division.
Finally, a list of amateur sumo events around Japan for 2025 (in Japanese).
In English: Tachi-Ai sumo blog; Japan Times sumo coverage; Mainichi
In Japanese: Nikkan Sports; Sponichi Annex; Chunichi sumo articles; Hochi.news sumo articles; Sanspo; BBM Sports; Abema. Want to find out why your guy went 休場 (kyuujo, absent)? This is how.
Japanese language resources: DeepL for translating entire articles; Jisho for looking up specific words and kanji; 10ten browser extension also lets you mouse over particular Japanese text of interest on websites.
A comprehensive gallery featuring head shots and bios of rikishi, oyakata, gyoji, yobidashi and more (correct to the beginning of 2023). Pre-bout rituals explained; What do the gyoji say?; the infamous report Expert Panel Recommendations on the Preservation and Development of Ozumo from April 2021; that time half a stable went AWOL because the stablemaster’s wife was being too harsh on them; interview with a yobidashi; countdown until Onokuni reaches mandatory retirement age
Mono-ii reports are very formulaic! They’re usually a couple of long run-on sentences that go something like this:
Matters for discussion and findings may include a touchout (te ga dete ori/orazu..), a simultaneous landing for both rikishi (doutai or ryousha), or even a disqualification (hansoku).
Helpful words to listen out for to get the gist of the report:
The outcome can go three ways:
Click the name of the shimpan to see what they look like. Thanks to the maintainer of this page for providing these images!
Stablemasters have * after their name; everyone else is a coach.
Members of this senior group join up with other shimpan groups to act as head shimpan after the juryo ring entrance ceremony & intermission. This month’s senior shimps are Takadagawa* (sekiwake Akinoshima), “Coconuts” Kokonoe* (ozeki Chiyotaikai) and Kumegawa (komusubi Kotoinazuma).
The official program only lists juryo-ranked yobidashi and above from Soichi onwards. Even after their match-calling shifts, these guys work throughout the day as attendants, minding the salt during salaried matches, etc.
There’s a slightly outdated gallery of yobidashi headshots with bios at Heyaaz - it’s missing Kumajiro because he debuted during 2023.
To help spot them, here’s links to screencaps of the lower ranked yobidashi in their order of appearance, including onscreen bios in Japanese: