But Emperor Komei recognizing Edo Shogunate thought poorly of the Sonno Joi radical party so Masakaze TAKASAKI, a feudal retainer of Satsuma Domain, and Imperial Prince Asahiko KUNINOMIYA received his will and schemed to raise the Coup of August 18 supported by the Satsuma and Choshu clan forces, which swept away from Kyoto Choshu clan and court nobles in Sonno Joi party including Sanjo.
しかし、江戸幕府を信認する孝明天皇はこうした尊攘過激派の行動を快く思わず、その意を受けた薩摩藩士高崎正風・久邇宮朝彦親王らの画策により、薩摩藩・会津藩の兵力を背景に八月十八日の政変が起こされ、長州藩および三条ら尊攘派公卿は京都から一掃される。