Under the political situation in the last days of Tokugawa shogunate, he interacted with samurai from Satsuma and Choshu Domains and worked hard for the establishement of the Satsuma-Choshu Alliance.
幕末の政治状況の中で、薩摩藩や長州藩の武士と交流し、薩長連合にも尽力したという。