Yamanashi Prefecture is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Kōfu. People have been living in the Yamanashi area for about 30,000 years. As in most other Japanese regions, prehistoric society in Yamanashi progressed though the hunting, fishing and gathering stage of the Jōmon period, then the rice-producing stage of the Yayoi period and subsequent village and regional formation. The Maruyama and Choshizuka Kofun (earthen burial mounds) located on Sone Hill of Nakamichi Town　(currently in southern Kōfu) are believed to have been built from the end of the 4th century. From these remains it can be assumed that the people of Sone Hill had great influence. Among the many Kaigenji generations, those of the Takeda, Ogasawara, and Nanbu families were particularly prosperous. During the Sengoku period of the 16th century, Takeda Shingen attained the status of daimyō and built Tsuzuji Mansion and the Yōgai Castle in Kōfu. From this base, he attempted to unify and control Japan. After Takeda’s death in 1582, Kai-no-Kuni came under the control of the Oda and Toyotomi Clans before being subsumed into the Tokugawa shogunate during the Edo period. Beneath the Edo shogunate, the Kofu Clan (based in Kuninaka, or Central and Western Yamanashi) and the Yamura Clan (based in Gunnai, or Eastern Yamanashi) were formed, but in 1724 the area came under the direct control of the Shogunate. With the development of the Koshu Kaidō (highway) and Fuji River transport, goods, materials and culture flowed into the region.