Jōshin'etsu-kōgen National Park (上信越高原国立公園, Jōshin'etsu-kōgen Kokuritsu Kōen) is a national park in the Chūbu region of the main island of Honshū, Japan formed around several active and dormant volcanoes. The park spans the mountainous areas of Gunma, Nagano, and Niigata prefectures. The name of the park refers to the two mountain ranges that makes up the park. It is divided into two separate areas: the Southern Niigata/North Nagano Area and the East Nagano Area.