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About Yoshioyama Osamu
- Yoshioyama Osamu (born 20 May 1949 as Osamu Yoshimura) is a former sumo wrestler from Yatsushiro, Kumamoto, Japan.
- He made his professional debut in March 1965 and reached the top division in November 1969.
- His highest rank was maegashira 2.
- Upon retirement from active competition he became an elder in the Japan Sumo Association under the name Onogawa.
- He left the Sumo Association in January 1977.
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