When his uncle KO no Moronao temporarily resigned as a steward of the Ashikaga clan due to a conflict with Tadayoshi ASHIKAGA, Moroyo was appointed Moronao's replacement by Takauji ASHIKAGA.
足利直義と対立した叔父の高師直が一時執事を辞職した際、足利尊氏に後任の執事に任命された。