甲斐国
The place name "Narusawa" is mentioned in the Kamakura period chronicle "Azuma Kagami" as a hamlet on the road connecting Kai Province with Suruga Province. During the Edo period, all of Kai Province was "tenryō" territory under direct control of the Tokugawa shogunate. With the establishment of the modern municipalities system in the early Meiji period on July 1, 1889, the village of Narusawa was created within Minamitsuru District, Yamanashi Prefecture.