Onigatani Saiji (鬼ヶ谷才治, April 19, 1855 – February 2, 1931) was a Japanese sumo wrestler who is known for being active in the top makuuchi division at the age of 51, which is a record after the beginning of the Meiji era.

At first, he joined Tokitsukaze stable in Osaka sumo but was recruited by former yokozuna Umegatani I and moved to Ikazuchi stable in Tokyo sumo.

He was the oldest active wrestler in makuuchi from January 1897 when he was 41 years old.

He was specially awarded a silver cup by the Sumo Association.

[1] Key:d=Draw(s) (引分);   h=Hold(s) (預り) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi