Yamaguchi Hisashi (born Hisashi Yamaguchi; April 16, 1952 – October 19, 2010) was a sumo wrestler from Nakatsu Ōita, Japan. He made his professional debut in January 1971, won the championship in his only sixth-division tournament, and another in March 1977 winning undefeated in third division. He reached the top division in May 1978, but struggled initially. After winning the second division in November, securing a second re-promotion, he reached his highest rank of maegashira 4 in March 1979. Upon initial promotion he had changed his shikona from his real name to Taniarashi Hisashi. He would drop back to the unsalaried ranks in 1980 Winning out in a rare nine-way playoff, he secured the third-division championship in March 1982, but retired soon after in November 1982. His son is Shun Yamaguchi, a former baseball player.
Source: “Yamaguchi Hisashi”, English Wikipedia (CC BY-SA 4.0), excerpt