In order for Saccho and Iwakura group to obtain real power, it was necessary for them, through military uprising, to abolish regent, chancellor and other conventional posts mainly taken up by pro-Tokugawa people, to establish a new system to realize direct rule by the emperor, and to inhibit Yoshinobu from being the core of the new government by asking him to surrender the post and domains (former terriroty of the bakufu) to the Imperial Court, and this situation led to the movement of the Restoration of Imperial Rule.
薩長や岩倉らが実権を掌握するためには、武力蜂起により親徳川派中心の摂政・関白その他従来の役職を廃止して天皇親政の新体制を樹立し、慶喜には辞官・納地（旧幕府領の返上）を求めて新政権の中心となることを阻止することが必要となり、王政復古(日本)へ向かっていくことになった。