富士五湖
Yamanashi Prefecture is bordered by Tokyo, Kanagawa Prefecture, Saitama Prefecture, Shizuoka Prefecture, and Nagano Prefecture. The prefecture is landlocked, with high mountains surrounding the central Kōfu Basin. Mount Fuji and the Fuji Five Lakes region is located on the southern border with Shizuoka. Mount Fuji provides rain shadow effects, and as a result, the prefecture receives only about 818 mm of rainfall a year.As of April 1, 2012, 27% of the total land area of the prefecture was designated as Natural Parks, namely the Chichibu Tama Kai, Fuji-Hakone-Izu, and Minami Alps National Parks; Yatsugatake-Chūshin Kōgen Quasi-National Park; and Minami Alps Koma and Shibireko Prefectural Natural Parks.