General Rules of Sayokan Fighting
Sayokan is a full-contact martial art system that determines the aim of knocking down with rules. 3 referees (reviewers) serve for each match. One of the referees manages the match, one is the timekeeper and the other is the fixture referee.
Matches are played on 14m x14m tatami. There is a circle with a diameter of 2.5 cm in the middle of the tatami where the match takes place. The seniors' match is 4 minutes long. Two minutes of the match continues inside the circle and two minutes continues on the entire tatami.
For details of the rules;