Another theory says that Aijiro SASAKI was originally a spy of Choshu clan, but he, who was strongly impressed by the Shinsengumi's ideal, betrayed the Choshu side.
もう一説は、佐々木愛次郎は長州の間者（スパイ）であったが新選組の理想に感銘しそのまま長州を裏切る事になる。