According to the Story of Mikizo OISHI, who was an elder brother of his fellow Shinsengumi member, Kuwajiro OISHI, Yujiro IMAI was involved in the death of Mikizo OISHI (But as Mikizo was actually a younger brother of Kuwajiro, this story is most likely fiction).
新選組隊士大石鍬次郎の兄・大石造酒蔵物語上の最期したとも伝わる。（但し、造酒蔵は実際は鍬次郎の実弟であるため、虚構の疑いも強い）。