Claim: Wakamiyama Kōhei is a former sumo wrestler which is a form of competitive full-contact wrestling.
Evidence: Wakamiyama Kōhei (born 16 April 1943 as Toshihiko Kumano) is a former sumo wrestler from Toyama City, Japan. "striking one another") is a form of competitive full-contact wrestling where a rikishi (wrestler) attempts to force his opponent out of a circular ring (dohyō) or into touching the ground with any body part other than the soles of his feet (usually by throwing, shoving or pushing him down).