On December 13, 1867, Kondo welcomed Ito to house of his mistress where he got him drunk before he was assassinated (Abura-no-koji Incident) on the way home in front of the gate of Honko-ji Temple on Abura-no-koji Street by several Shinsengumi members including Kuwajiro OISHI, and it is said that he died while crying 'you villains.'
慶応3年11月18日、近藤は妾宅にて伊東を歓待して酔わせ、帰途にあった油小路の本光寺門前にて同隊士の大石鍬次郎ら数名により暗殺され（油小路事件）、「奸賊ばら」と叫んで絶命したと伝わる。