The Japanese surnames etymology dictionary.
Birth of Yamanashi-ken Kitatsuru-gun Kosuge-mura . A place name with a record since the Edo period. Iwate-ken Morioka-shi Uchimaru was in the Edo period in the clan san Morioka of the clan government. There is a tradition to the same clan.
③ Convention . Sugawara's abbreviation. Iwate-ken In Towa-cho of Hanamaki-shi , say that Sugawara surname was hijacked and Meiji New surname was left, leaving "Kan" remodeled . The family crest is plum bowl in the same place. Iwate-ken Kitakami-shi It is handed down in Kuroiwa. Gunma-ken Shibukawa-shi In Ureshiri tells Mr. Sugawara's descendant. 菅原 reference.