During the months from October to December (according to the old lunar calendar) the powerful lords agreeing to the political cooperation between the Shogunate and the Imperial Court, such as Hisamitsu SHIMAZU (the father of the head of the Shimazu clan), Shungaku MATSUDAIRA (the former head of the Fukui clan), Munenari DATE (the former head of the Uwajima clan), Yodo YAMAUCHI (the former head of the Tosa clan), and Yoshinobu HITOTSUBASHI came to Kyoto one after another, and they were appointed as members of the Sanyo-kaigi with Katamori MATSUDAIRA, then the political cooperation between the Shogunate and the Imperial Court began in the form in which the delegates of the Shogunate speak in the Imperial Court.
また、10月から12月にかけて公武合体派の島津久光（薩摩藩主の父）、松平春嶽（前福井藩主）、伊達宗城（前宇和島藩主）、一橋慶喜、山内容堂（前土佐藩主）が上洛、松平容保とともに朝廷参与会議に任命され、朝廷の下での雄藩の国政参画が実現した。