After being assigned as Kanrei, he led the shogunate government implementing Hanzeirei (order allowing military governors, or Shugo, to collect half of the taxes from manors and demesnes as military fund) and making peace with the Southern Court while assisting the youthful Yoshimitsu ASHIKAGA.
管領への就任で幕政を指導し、また幼少の足利義満を補佐して、半済令の施行や南朝との和睦などを行う。