He became the Sadaijin (minister of the left) by gaining the support from Yoshimitsu ASHIKAGA, who had the title of Seii Taishogun (literally, "great general who subdues the barbarians"), and Yoshimasa (Yoshiyuki) SHIBA, who had the title of Kanrei (Shogunal Deputy), and he eventually became the priest.
さらに征夷大将軍足利義満・管領斯波義将の後援があり、1395年（応永2年）に左大臣となり、まもなく出家した。