On the other hand, the first time Dosan's name appears in historical materials is as "Norihide FUJIWARA" in a document dated June, 1533; this name also appears in a document signed jointly by Kagehiro NAGAI and Norihide NAGAI, dated November 26 of the same year.
一方、道三の史料上の初出は天文2年（1533年）6月付け文書に見える「藤原規秀」であり、同年11月26日付の長井景弘・長井規秀連署状にもその名が見える。