The author, TAIRA no Tomonobu, was Jushiijo (Junior Fourth Rank, Upper Grade) governor of Dewa Province, and his family was Kanmu Heishi (Taira clan) TAIRA no Takamune-ryu (TAIRA no Takamune line).
筆者は従四位上出羽国守平知信（桓武平氏平高棟流）。