As the memory keeper, there may possibly have been some entertainment groups which traveled around the Kinai region (the five capital provinces surrounding the ancient capitals Nara and Kyoto) with dancing and singing being their profession, suggesting a possibility that the material of the story may be product of the entertainment world which is far from the historical fact.
伝承者として、歌舞を業として畿内を巡遊する芸能集団の存在が窺われ、物語素材も史実とはかけ離れた芸能的世界の所産であろうという。