Rules

Contest Judo rules can be quite complex and the way referees are told to enforce the rules is constantly changing. Below is a super simple introduction to way the sport of Judo works.

To win a Judo contest a player needs to obtain an ippon score, be ahead in score when contest time runs out, or his opponent must be disqualified (Hansoku make).

Ippon (and so the match) is awarded to a competitor for the following:

• throwing opponent onto their back with speed and force;

• pinning opponent on his back for 20 seconds;

• scoring two waza-aris (see below);

• gaining submission from opponent (see below).

• Throwing opponent onto his side, or onto back lacking one of speed or control.

• Holding opponent on his back for 10-19 seconds.

There are several reasons someone may tap to indicate their submission (and therefore loss of contest). When a player is forced to tap his opponent is awarded an ippon win.

• Arm locks: attacking the elbow only. No other joint locks are permitted.

• Strangles or chokes.

• Accepting (s)he is unable to escape a pin/hold.

• A minor penalty (Shido) may be given to a player for a number of minor infringements including gripping, stepping out of area, not attacking.

• Disqualification (Hansoku make) is given to player who is given a third shido or who commits a grave infringement of the rules or an action against the spirit of Judo.