The pro-shogunists laid an ultimatum that demanded the withdrawal of the Choshu troops by a specified date, keeping in line with the shogunate's (the Aizu and Satsuma conservatives', including Yoshinobu HITOTSUBASHI) intention to break off the negotiation through the imperial court and pro-Choshu nobles with Choshu, to provoke and defeat the Choshu army once and for all.
朝廷と長州派公卿を介した長州との交渉を打ち切らせ長州軍を挑発して一気に蹴散らしたい幕府側（一橋慶喜・会津・薩摩守旧派）の意向をそのまま受けて、長州軍の退去を期限付きで最後通告して来た。