On January 9, 1871, he was attacked and assassinated by an assassin (or assassins) in the middle of the night, after having a banquet with visitors at his private residence in Fujimi-cho, Kojimachi, Tokyo Prefecture.
1871年（明治4年）1月9日、東京府麹町富士見町の私邸にを招いた宴会後の深夜、刺客の襲撃によって暗殺された。