In the Coup of August 18 that happened in the same year, he guarded Sakaimachigomon as a samurai of the Choshu clan, charging a cannon, but cleared off by Kobu Gattai ha (supporters of the doctrine of unity between the Bakufu and the imperial court), he went along with Sanetomi SANJO and other seven Kugyo (high court noble) of Sonno Joi ha (supporters of the doctorine of restoring the emperor and expelling the barbarians) in their Choshu exile (the exile of the Seven nobles from Kyoto).
同年の八月十八日の政変では長州藩兵として堺町御門の警備を担当し大砲掛となるも、公武合体派に排除され、三条実美以下7人の尊皇攘夷派公卿の長州亡命（七卿落ち）に同行した。