There is, however, a possibility that this child mentioned in the diary could not officially be recognized in the genealogy records, such as the "Sonpi Bunmyaku" (a book compiled in the fourteenth century that records the lineages of the aristocracy), and as such, Moroyasu date of birth remains unknown.
しかし、この記事が『尊卑分脈』等の系譜に記載されない忠平の子である可能性もあるので、生年は未詳とした。