According to the historical materials such as "Nihonkoki," it seems that the policies of the government which Sonohito led were Hyakushobumin and the oppression of influential families which had been proposed since he was Sangi.
『日本後紀』などによれば、園人が主導する政府の施政方針は、参議時代から提唱していた百姓撫民および権門抑制だったと考えられている。