Sakuma 【左久間】2 The Japanese surnames etymology dictionary.
Yamaguchi-ken Houfu-shi . Terrain . Heterogeneity of the 下元 class. Oosaka-fu Ibaraki-shi In Isuzu-cho, Kouchi-ken Kouchi-shi Marunouchi got permission in the same year after Mr. Shimoda of the Tosa clan of the Clan office became prohibited in 1850 (Yoshinaga 3 years) In 1854 (Yoshinaga 7 years) tell her that she was renamed under "Yuan".