The Nariyasu clan is one of the shichimeike (seven renowned families) of the Hirano clan which descended from SAKANOUE no Hirono, the feudal lord who developed Hirano who was the second son of dainagon (chief councilor of state) and shogun SAKANOUE no Tamuramaro.
成安氏は、征夷大将軍の大納言坂上田村麻呂の次男で平野の開発領主となった坂上広野の子孫といわれる平野氏の七名家の一つである。