He appears in 'Sonpi Bunmyaku' (Bloodlines of Noble and Base) as the son of TAIRA no Shigemori, who was the younger brother of TAIRA no Sadamori and governor of Mutsu Province, and he has the official rank of Jugoinojo (Junior Fifth Rank, Upper Grade) and is Kazusa no suke (Assistant Governor of Kazusa Province) and governor of Dewa Province.
「尊卑分脈」では平貞盛の弟陸奥守平繁盛の子で官位官職は従五位上上総介・出羽守。