Documents written at the same time period such as "The Tale of the Heike" and "Gukansho" (Miscellany of Ignorant Views) are often written after the decline of the Taira clan and from the viewpoint of the aristocracy and temple classes that were suppressed under the Taira clan administration.
『平家物語』や『愚管抄』など同時代の文献は、平氏滅亡後に平氏政権に抑圧されてきた貴族社会や寺社層の視点で描かれてきたものが多い。