In the official address Prince Shirakabe made when he became the Crown Prince (on September 18, 770), there were following words: 'Dokyo was looking for the opportunity to ascend the Imperial Throne'; however, there was absolutely no mention of concrete action in terms of the Dokyo's side.
なお、この時（宝亀元年8月21日）の白壁王の令旨に「道鏡が皇位をうかがった」とする文言があるものの、具体的に道鏡のどのような行動を指すのかには全く触れられていない。