Even after his father's term as Kazusa no kuni no suke expired, he did not return to Kyoto but succeeded to Kazusa no kuni no suke after his father, thereby extending power in Kazusa and Shimosa Provinces.
父高望の上総介の任期が過ぎても帰京せず父に次いで上総介を勤めるなどし、上総下総国に勢力を拡大。