A sumo wrestler tosses salt to purify the ring at the Ryogoku stadium in Tokyo, Japan
Grand Champion Sumo Wrestler, Taiho Performing Ring Ceremony Before Match Premium Photographic Print by Bill Ray at Art.com
It is believed that a ring came into being in 16th century as a result of a tournament organized by principal warlord, Oda Nobunaga. At this point wrestlers would wear loose loincloths, rather than much stiffer mawashi of today. During Edo period, wrestlers would wear a fringed kesho-mawashi during bout, today these are worn only during pre-tournament rituals. Most of the current forms within the sport developed in the early Edo period.