Goshirakawa explained to Yoritomo that it was 'the act of evil spirits' (the item of November 15 of "Azuma kagami" [The Mirror of the East], the item of November 26 of "Gyokuyo" [Diary of Kanezane]), but Yoritomo thrusted a demand for the mouseleum hall reform to check dictatorship of the retired emperor.
後白河は頼朝に「天魔の所為」と弁明するが（『吾妻鏡』11月15日条、『玉葉』11月26日条）、頼朝は院の独裁を掣肘するために廟堂改革要求を突きつける。