Joining the Choshu administration, he devoted himself to the military and political reform of the domain government in order to implement the policy of nominal submission to the shogunate with secret armament as expected by Takasugi and other comrades.
長州政務座に入ってからは、高杉たちが所望する武備恭順の方針を実現すべく軍制改革と藩政改革に邁進する。