He was supposedly involved in political policies centering around those related to Buddhism, and the fact is that with his backing, his younger brother Kiyohito was raised to the position of Dainagon (chief councilor of state) in the manner of accelerated promotion, thus actively promoting his relatives and disciples.
道鏡が関与した政策は仏教関係の政策が中心であったとされているが、彼の後ろ盾を受けて弟の浄人が大納言に抜擢された他、多くの一族・門人が登用された。