According to "Taiheiki" (The Record of the Great Peace), in the Battle of Hakone and Takenoshita, he forged an imperial order to make reluctant Takauji to enter into the battle.
『太平記』には箱根・竹ノ下の戦いにおいて、偽の綸旨を作り、渋る尊氏を出陣させたとある。