Shishihō Yoshimasa (born Osamu Tanaka; August 14, 1955 – October 7, 2006) was a sumo wrestler from Moriyama, Nagasaki, Japan. He made his professional debut in January 1971, and became the first sekitori from Taiho stable when he reached the juryo division in July 1977. He reached the top division in September 1979. His highest rank was maegashira 2. His favourite techniques were migi-yotsu and uwatenage. Upon retirement in May 1987 he was hired by the Sumo Association as a wakaimonogashira. He left the sumo world in July 1991. He died of cancer in 2006.