In "Masukagami" ("The Clear Mirror"), which is a book of historical stories, only an article on a waka (=tanka; a traditional Japanese poem of thirty-one syllables), 'By virtue of the kamikaze that was the result of our pray by an imperial order, surging waves were broken,' which was reportedly composed by Tameuji NIJO, who accompanied Tsunetada, on the occasion he heard about the defeat of the Yuan Dynasty, was recorded with respect to an Imperial envoy in 1281; however, there is a view that, although Tsunetada composed this waka but the author of "Masukagami" who was not satisfied with the fact that such a waka, which was filled with loyalty and patriotism, was composed by an apostate like Tsunetada, changed the composer of the waka to Tameuji.
また歴史物語である『増鏡』では、弘安4年の勅使の記事について、経任に随従した二条為氏が帰途の際に元王朝敗退の報を聞いて詠んだとされている「勅として祈るしるしの神風によせくる浪はかつくだけつつ」という和歌の記事しか記載されていないが、一説にはこの歌は経任が詠んだにも関わらず、忠義と愛国の情に満ちたこの歌を変節漢の経任が詠んだという事実そのものに不満を持つ『増鏡』著者の手によって著者を為氏にと書き改められたのではという説が唱えられている程である。