The Japanese surnames etymology dictionary.
Saitama-ken , Yamanashi-ken . Saitama-ken Kumagaya-shi I tell him that in Nakano you changed from Sakata surname in the Edo period. 坂田 reference. Yamanashi-ken Yamanashi-shi Kami Kanaikawa (Kamikanogawa) was a place name that was called "Kamikawa-gawa" in the Warring States Period. It is a descendant of Mr. Takeda's vassal that returned home in the same year in 1582 (Tensho 10 years).