Ozumo Log is a database of professional sumo — every bout, every ranking sheet and every wrestler we can source — published as a set of pages anyone can read. It is run by one person as a hobby.
⚠️Not an official site
This site has no connection to the Japan Sumo Association or to any sumo stable. Please direct enquiries about wrestlers or stables to the official channels.
Where the data comes from
Bouts, banzuke and wrestler profiles — sumo-api.com
The list and definitions of winning techniques — Japan Sumo Association official site
Japanese spellings, real names and name changes — sumodb
Photographs — Wikimedia Commons and Wikipedia; the licence for each photograph is printed beneath it
Limits of the numbers
⚠️Coverage before the late 1950s is thin in the source data. Where this site says “the first” or “the most”, it means the first or the most in the records we hold, which is not the same as the first in the history of the sport.