Under these circumstances, in Choshu domain, which had been the center of the Sonno Joi Movement but started to wane after the Coup of August 18 in the previous year, debate began over a proposed move to Kyoto.
このような状況下、前年の八月十八日の政変以降影響力を減退していた尊王攘夷派の中心・長州藩では、京都への進発論が沸騰。