There was a Kan-senshi (an edict from Dajokan (Grand Council of State) which had the status of a binding official document) issued in 1053 in Iga Province, which ordered discontinuing issuing the certificates to shoen (manors in medieval Japan), and admitted shoen's exemption from paying the tax backed by the authority of Honke (the owner of the highest-grade patches of land under the stratified land ruling structure of Shoen), and Sukehira's shoen was subject to this edict, as were those of the Michinaga's descendents (Mido Line), such as FUJIWARA no Norimichi, FUJIWARA no Yoshinobu, and FUJIWARA no Nobunaga.
天喜元年（1053年）の伊賀国で本家の威光を背景に、税を納めない荘園の立券を停止することを命じている官宣旨では、藤原教通、藤原能信、藤原信長らの、道長の子孫（御堂流）と並んで、資平の荘園も挙げられている。