As mentioned above, even if it includes some episodes or modifications of the later times, there is an original text of "Gosannen Kassen Ekotoba" in the Jowa edition in the period of the Northern and Southern Courts which was written in the end of the Heian period.
上記の通り、後世の逸話、文飾が紛れ込んでいるにしても、南北朝時代時代の貞和版『後三年合戦絵詞』には、更に平安時代末期の底本がある。