- Born: ?
- Died: 1892
- Rank: Shinsengumi corporal (Gochô)
- Japanese: 尾関雅次郎
Masajirô was Ozeki Yashirô's younger brother. He joined the Shinsengumi in 1863 and fought against the imperial troops until the last battle in Hakodate in 1869.
References
- Shinsengumi Zentaishi Tettei Guide (新選組全隊士徹底ガイド) Maeda Masaki