According to "Azuma Kagami" (The Mirror of the East), Hideyasu, along with Taneyoshi, were mentioned as treacherous retainers giving a slanderous account to the Retired Emperor in a speech delivered by Masako HOJO to persuade gokenin, suggesting that Hideyasu was viewed as the key figure in Kyoto by the Kamakura Shogunate.
『吾妻鏡』によれば、北条政子が御家人を説得するために鎌倉で行った演説で秀康は胤義とともに太上天皇に讒言した逆臣として名を挙げられており、鎌倉幕府からは京方の中心人物と目されていたことがうかがえる。