Saigō Tanomo (西郷 頼母; May 16, 1830 – April 28, 1903) was a Japanese samurai of the late Edo period. Chief senior councilor (hittōgarō 筆頭家老) of the Aizu clan, he achieved fame due to his distinguished action in the Boshin War. He adopted the name Hoshina Chikanori (保科 近野里). Surviving the war, he became a Shinto priest, and achieved renown as a martial artist. He is considered one of the teachers of the famed Takeda Sōkaku.
Source: “Saigō Tanomo”, English Wikipedia (CC BY-SA 4.0), excerpt