The Oze National park, which is located not too far from Tokyo, stretches across four prefectures: Gunma, Fukushima, Niigata and Tochigi. The park is famous for its large marshland surrounded by mountains. To protect its fragile vegetation from human traffic, the park features an extensive network of boardwalks which makes for a easy hike and allows one to access areas of the wetland when you would otherwise be knee-deep in the water. Many mountain huts are scatered arounf the park for a pleasant overnight stay. Sleeping quarters consist of private tatami rooms with futons. All huts serve a warm dinner and most of them have public warm baths.