Meanwhile, it appears Masamichi was involved also in the management of Hiranosho (present Hirano Ward, Osaka City) in Sumiyoshi-gun of Settsu Province which had been an important domain for the Sakanoue clan since the time of his father or of his uncle Hirono.
一方、当道は、父あるいは伯父の広野以来の坂上氏の重要な拠点でもある摂津国住吉郡平野庄（大阪市平野区）の経営にも従事していたようである。