According to the account given by Kanefumi NISHIMURA in "Mibu Roshi Shimatsuki," Genosuke Ito had wanted to join the shinsengumi, but was rejected, and withdrew.
西村兼文『壬生浪士始末記』では、伊藤源助は新選組入隊を志すも許されず、退去したと認められている。