- Born: 1835
- Died: 1891
- Rank: Shinsengumi Investigator (Kansatsukata)
Arai Tadao joined the Shinsengumi in 1864, and left for Goryo Eji in 1867.
He fought against the Tokugawa Bakufu in the Boshin War.
After the Meiji Restoration, he served the new government.
- Shinsengumi Taishi Den (新選組隊士伝) Gakken
- J-Wikipedia Arai Tadao