On August 18 of the same year, wishing to prevent the Choshu soldiers from entering the capital Kyoto, he discussed with a feudal retainer of the Satsuma domain Kosuke YOSHII and a feudal retainer of the Kurume domain Keisuke Otsuka, and then they petitioned Imperial Court with a written opinion which they signed jointly to require the determination (the Kinmon Incident).
同年7月17日長州兵の入京を阻止せんと欲し、薩摩藩士吉井幸輔、久留米藩士大塚敬介らと議して連署の意見書を朝廷に建白し、その決意を求めた(禁門の変)。