This policy was based on Confucianism, a key idea of the Ritsuryo system, but FUJIWARA no Fuyutsugu, who took over Sonohito, changed the policy drastically, making it policy to facilitate the development of reclaimed land.
これは、律令の背景思想だった儒教に基づく政策であったが、園人の後に政権を握った藤原冬嗣は一変して墾田開発の促進を政策方針とした。