Arimura Yûsuke was a Kagoshima domain retainer (and later ronin) who played a part in plotting the 1860 assassination of Ii Naosuke (Incident at Sakuradamon) and other violent political actions.
Yûsuke committed suicide in Kagoshima on 1860/3/24. He was later posthumously granted the Junior Fourth court rank.
References
- Ishin Shiryô Kôyô 維新史料綱要, vol 3 (1937), 290.