In the historical chronicle "Azuma Kagami" (literally, "Mirror of the East"), written by his opponents (who later became the Kamakura bakufu, Japanese feudal government headed by a shogun), he is described as follows.
敵対した側（後の鎌倉幕府）の歴史書である『吾妻鏡』は、忠綱を形容して以下のように記している。