Although the pair of picture scrolls itself is thought to have been made in the Medieval period, some people argue that it was later revised, altered or edited, considering some differences between depictions of Mongolian soldiers and Japanese mounted samurai warriors.
なお、絵巻物自体は中世のものと考えられているが、蒙古兵と日本騎馬武者の描写の違いなどから、後世の加筆、改竄、または編纂があったとする説も提唱されている。