The Edo bakufu tightened security at the stance of the imperialist Nishi Hongan-ji Temple, it ordered the Aizu clan to move the Shinsengumi (a group who guarded Kyoto during the end of Tokugawa Shogunate) headquarters from Mibu to the inside of the Hongan-ji Temple as they had given shelter to the feudal retainers of the Choshu clan.
幕府は西本願寺の勤皇姿勢に警戒を強め、長州藩士を匿ったことを理由に、会津藩に命じて新撰組屯所を壬生から本願寺門内に移させた。