Bandai-Asahi National Park is a national park in the Tohoku region, Honshū, Japan. The park site straddles over Fukushima Prefecture, Yamagata Prefecture, and Niigata Prefecture. The park was designated as a national park on September 5, 1950. The park encompasses 186,404 ha of land (the third largest national park in Japan), consisting of three independent units: the Dewasanzan-asahi Region, Iide Region, and Bandaiazuma-Inawashiro Region.
The Dewasanzan-Asahi Region is the most northern unit of the park. The northern portion of the Region consists of mountains called the Three Mountains of Dewa. The southern section of the region resides on the Asahi Range. National Route 112 separates these two mountain areas.