Then, after the success of 'the Coup of August 18' (September 26 in New calendar [solar calendar]) which was carried out mainly by the Satsuma and Aizu clans in order to expel the Choshu clan from Kyoto with gaining a support of the Emperor, Hisamitsu made the third visit to Kyoto (he left Kagoshima on October 24 and arrived at Kyoto on November 11).
そして、長州藩の勢力を京都から追放するべく、薩摩藩と会津藩が中心となって画策し、天皇の支持を得た上で決行された八月十八日の政変の成功後、久光は3回目の上京を果たす（9月12日鹿児島発、10月3日京都着）。