Also in "the genealogy of Kanmu-Heishi (Taira clan" compiled in "Zoku-Gunsho-Ruiju," he appears as the son of Shigemori, and he is also mentioned as 'the same shogun called Yogo' and 'Shogun Dewa no suke (Assistant Governor of Dewa Province).'
『続群書類従』収録の「桓武平氏系図」でも繁盛の子となっており「同将軍号余五」「将軍出羽介」と注記がある。