When Kiyouji who was once the steward of the bakufu fell from power in 1361 and joined the Southern Court, Sadayo was ordered by his father and came from Totomi Province to call for pacification.
幕府執事となった清氏が61年に失脚して南朝に下ると、父の命で講和呼びかけのために遠江から召還される。