Oze National Park has a long history. In 1934, it was designated part of Nikko National Park, and then in 2007 the two were separated. It was combined with surrounding areas, such as Mt. Aizu-Komagatake, Mt. Tashiro, and Mt. Taishaku, to create Japan’s 29th designated national park.
Oze National Park, like all of Japan's national parks, has no entrance fees, no opening and closing hours, and a permit is not required to enter or stay in the park. The national parks of Japan differ from national parks worldwide in that the land within the national parks is not exclusively designated for national park use and is made up of private property as well as public and protected areas. Visitors are free to enter and leave at any time.
The Oze area is a mountainous region which was formed through the eruptions of the Oze volcanoes. Lake Ozenuma and Ozegahara Plateau are volcanic high moors formed by the damming of a depression by ejecta from volcanic eruptions. Ozegahara Plateau is central to this landform which comprises Honshu’s largest (around 760 ha) mountain marsh.
To the north of Lake Ozenuma and Ozegahara Plateau lie Mt. Hiuchigatake—the highest peak in northern Japan at 2,356 m—and Mt. Keizuru; to the west lie Mt. Shibutsu, Mt. Koshibutsu, and Mt. Kasagatake; to the south lies Mt. Nikura; and to the east lie Mt. Monomi and Mt. Kinunuma. This series of precipitous ridges reflect the mountains’ golden years.
To reach the summit, follow the mountain trail from Hatomachi Pass to Mt. Shibutsu and take the trail that branches off along the way at Oyamazawatashiro. Fields of flowers spread out around the trails, and from the summit you can enjoy a 360º panoramic view including not only Mt. Shibutsu and Mt. Hiuchigatake, but also Mt. Joshu-Hotaka in the distance.
Ayamedaira Marsh covers a broad, gradual ridge on the south side of Ozegahara Plateau. Because of the high altitude, snow melts slowly and flowers bloom intensely for short periods of time. The colonies of Narthecium asiaticum that bloom in July and August are especially spectacular, creating a heavenly paradise.
The park is located at a point where north-south and Pacific Ocean-Japan Sea zones connect. As with its flora, the national park has a diversity of fauna. In particular, many large mammals can be observed here, including the Japanese serow and Asian black bear, which prefer rich forest environments.