Okada Izō, Japanese samurai (b. 1838)

Okada Izō (岡田 以蔵, February 14, 1838 – May 11, 1865) was a Japanese samurai of the late Edo period, feared as one of the four most notable assassins of the Bakumatsu period. He was a member of Tosa Kinnoto (土佐勤王党, Tosa Imperialism party, a loyalist clique of Tosa) in his hometown, Tosa Domain. Izō and Tanaka Shinbei were active in Kyoto as assassins under the leadership of Takechi Hanpeita.

His personal name (imina (諱)) was Yoshifuru.