Ōnobori Mitsuhiro (born Isamu Ishida, August 1, 1925 – March 1, 2009) was a sumo wrestler and coach from Karuizawa, Nagano, Japan.

He made his professional debut in January 1941, reaching a highest rank of maegashira 1.

In January 1955 he defeated yokozuna Tochinishiki to earn his only kinboshi, or gold star.

In January 1971 he became head coach of Kasugayama stable following the death of ex-Nayoroiwa.

[1] 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