飛騨山脈
is a national park in the Chūbu region of Japan. It was established around the Hida Mountains and encompasses parts of Nagano, Gifu, Toyama and Niigata prefectures. It was designated a national park on December 4, 1934, along with Daisetsuzan National Park, Akan National Park, Nikkō National Park, and Aso Kujū National Park.