Emperor Uda highly valued the skill of Yasunori and assigned him to be the Sadaiben (Major Controller of the Left) in 891, Sangi (Royal Advisor), Omi no kuni Gon no kami (Provisional Governor of Omi Province), and Minbukyo (Minister of Popular Affairs).
宇多天皇は保則の力量を高く評価し、寛平3年（891年）左大弁、次いで参議、近江国権守、民部卿に任じられる。