Sadaie was promoted to Oshu Kanrei (shogunate deputy of the northern regions [the former position of the Oshu Tandai who supervised for the civil government and military affairs in Mutsu Province]) from hisashi ban (a person who keeps the night watch staying under the eaves of building) of Imperial Prince Nariyoshi, and settled in Taga-jo Castle in Mutsu Province then became the key person for the Oshu rule of the Ashikaga Administration.
貞家が成良親王の廂番から奥州管領（奥州探題の前身）にまで出世し、陸奥国多賀城に拠って足利政権の奥州統治の要となる。