What are the rules of sumo?
B · Beginner · The bout · 1 of 3Sumo is Japanese wrestling in a raised clay ring. Two rikishi charge, and the first forced out of the circle, or touching the ground with anything but the soles of the feet, loses. A bout often lasts seconds. Professional sumo is run by the Japan Sumo Association; amateur sumo by the IFS.
How it works
- Ring: clay dohyo, 4.55 m circle.
- Wrestlers: rikishi.
- Belt: mawashi only.
- Lose: step out or touch down.
- Soles: may touch.
- No weight classes: professional sumo.
- Amateur: weight classes, women too.
- Bodies: JSA and IFS.
The glossary has the dohyo, the rikishi, the mawashi, the bout, the win condition and the amateur sumo.
Tricky cases
A fingertip touches the clay. Result?
The bout is lost.
Is there a time limit?
In IFS sumo, three minutes, then a rematch.
Do men and women fight each other?
No.
Are there weight classes in professional sumo?
No.
Why the rule exists
A single simple win condition makes every bout decisive and quick.
Where it differs
| Where | What changes | Source |
|---|---|---|
| Professional | No weights | J p3 |
| Amateur | Weight classes | W |
| IFS | Three-minute limit | I 22 |
From the rule book
Japan Sumo Association, Sumo (introduction booklet), pages 3 to 7, with International Sumo Federation, Regulations on Refereeing (in force 6 September 2024), Articles 9 and 22. Checked 15 October 2026. Official documents: JSA Sumo booklet and IFS Regulations on Refereeing 2024.