With Mt. Kita-okusenjo as the highest peak (2,601 m), Chichibu-Tama-Kai National Park is a unique park blessed with mountains and clear streams. The park comprises the lofty Okuchichibu Mountains at 2,000 m, extending from Mt. Kimpu and Mt. Kobushigatake to Mt. Kumotori, and the surrounding Mt. Daibosatsu, Mt. Ryokami, Mitake-Shosenkyo Gorge and Okutama. The mountain range stretches about 40 km from north to south and about 70 km from east to west.
Chichibu-Tama-Kai 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.
Although Chichibu-Tama-Kai National Park is situated in a region lined with lofty mountains as high as 2,000 m above sea level, there is no volcanic mountain, which is unusual in Japan. River channel erosion has created V-shaped valleys with varied landscapes.
Chichibu-Tama-Kai National Park exhibits various types of plants unique to mountains and highlands. Owing to a number of mountains consisting of limestone, the vegetation of a limestone region is another regional characteristic, making it a habitat for valuable plants. Many visitors come here to view the seasonal flowers.
Situated on the prefectural border between Yamanashi and Nagano, Mt. Kimpu is the tallest peak of the Okuchichibu Mountains. Covered by an expansive colony of dwarf stone pines near the mountain top, the mountain evokes a distinctive mood that contrasts sharply with other conifer-enveloped peaks in Okuchichibu.
Mt. Kita-Okusenjo is the highest peak of the Okuchichibu Mountains and offers magnificent views from the top. Yumeno-Teien Garden adjacent to Oodarumi Pass presents lovely views as the gigantic stones, bushes, and alpine plants create a scene reminiscent of a garden.
The Nishizawa Gorge is a dynamic ravine created by the actions of a clear stream flowing through a primeval forest. The surrounding scenery is reflected in the surface of the water and there is a diverse range of seasonal appearances.
There is a unique landscape of terraced fields and stone steps within the park. The mountain passes connecting mountain communities were used as a lifeline, and a number of historical mountain passes remain in the area, including Karisaka Pass. These passes are used as hiking courses where visitors can learn the workings of those who live deep in the mountains.