He fought in the war against the shogunate as a close adviser of Takauji ASHIKAGA and was assigned as an officer along with his brother Moroyasu at Kubodokoro (a court of justice) and Zasso-Ketsudansho (an agency of the Kenmu government to file lawsuits) during the Kenmu Restoration.
足利尊氏の側近として討幕戦争に参加し、建武の新政においては、師泰と共に窪所・雑訴決断所の役人に任じられている。