When Tadamori died in 1153, FUJIWARA no Yorinaga said of him 'he governed several provinces, gained riches, obtained followers and was full of military prowess' ("Ukaikisho"), and this indicates the greatness of the Taira clan.
仁平3年（1153年）忠盛が没したとき、藤原頼長は「数国の吏を経、富巨万を累ね、奴僕国に満ち、武威人にすぐ」（『宇槐記抄』）と評したが、これは平氏の実力の大きさを物語っている。