In his "History of Japan Vol. 8, Mongol invasion attempts against Japan" published in 1965, Toshio KURODA introduced an outline of Kagen War written in "Horyakukanki," and wrote that "However, this strategy is not good, and when everything comes to a dead end, even the power struggle becomes absurd as well."
黒田俊雄は1965年の『日本の歴史8　蒙古襲来』で、『保暦間記』に書かれている嘉元の乱のあらすじを紹介して、「しかしこの作戦はまったくまずい...すべて行きづまってくると、権力欲の争いもくだらないやりかたになってくる」と書かれている。