Mitsuneyama Keiji, real name Tōichi Shimamura (7 February 1922 – 15 August 1989) was a sumo wrestler from Arakawa, Tokyo, Japan who won the top division yūshō or tournament championship in 1954.

He earned nine kinboshi or gold stars for defeating yokozuna whilst ranked as a maegashira, and seven sanshō or special prizes.

At 32 years and one month he is the sixth oldest first time yūshō winner since World War II, behind Kyokutenhō, Tamawashi, Tamanoumi, Yoshibayama and Takatōriki.

He produced the top division wrestlers Daiju and Kōbōyama, but resigned due to ill health in 1982, the heya being absorbed into another incarnation of Kumagatani stable founded by the former Yoshinomine.

Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi