Sumo wrestling is a traditional Japanese sport in which two opponents compete to push each other out of a circular ring. The sport is steeped in centuries of tradition and is considered one of the most popular spectator sports in Japan. Competitors, known as rikishi, wear traditional m
From Wikipedia
Sumo is a form of competitive full-contact wrestling where a rikishi (wrestler) attempts to force his opponent out of a circular ring or into touching the ground with any body part other than the soles of his feet.