When the Sonno Joi party (the anti-foreigner Royalists) centered around the Choshu-han Clan lost their case upon the political change on August 18, Yoshinobu went to Kyoto again in order to participate in a meeting jointly held by the party trying to unite the nobles and samurai (Kobu Gattai) and the party assisting the Shogunate (Sabaku).
八月十八日の政変で長州藩を中心とする尊皇攘夷派が排斥されると、公武合体・佐幕両派による参与会議に参加すべく再び上洛。