Even after entering into priesthood in 1478 by shaving his head and calling himself Dokan, Sukenaga OTA ruled over the southern Kanto region from his base of power in the southern Kanto region until his assasination in 1486.
太田資長は文明(日本)10年（1478年）に剃髪し道灌と号し、文明18年（1486年）に謀殺されるまで江戸城を中心に南関東一円で活躍した。