They participated in the management of Tohoku region and the Seii project by Shuntettu being Commander-in-Chief of the Defense as well as Seii Fukushi and Mukyo being the governor of Dewa Province in the late Nara Period, and they held their positions as middle ranked nobles until the mid Heian Period.
奈良時代末期には俊哲が陸奥鎮守将軍征夷副使などに任じ、武鏡は出羽国守となるなど、敬福以来東北地方の経営と征夷事業に関わり、平安時代中期まで中級貴族として存続した。