At that time, Momokawa cleverly acted in a changing political world such as continuing sending money secretly to WAKE no Kiyomaro who was exiled for the plot of the oracle ("Momokawa den [the biography of Momokawa]") while he was officially at the center of the administration of Emperor Shotoku and Dokyo as Naiju no Taifu (Senior Assistant Minister of Royal Pages).
そのころの百川は、表向きは内豎大輔として称徳天皇・道鏡政権の中枢に参加する一方で、神託事件によって配流された和気清麻呂のために秘かに仕送りを続ける（『百川伝』）など、激動する政界において巧みに振舞ってきた。