Okutadami, Okunikko and Okutone mountains

Country/territory: Japan

IBA Criteria met: A3 (2004)
For more information about IBA criteria please click here

Area: 313,000 ha

Wild Bird Society of Japan
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 medium favourable low
For more information about IBA monitoring please click here

Site description
Okutadami: Located on the border between Fukushima and Niigata Prefectures, is covered with snow of more than 5 meters in midwinter. Golden Eagles and Hodgson's Hawk-Eagles are found in the precipitous mountains. Freshwater fish such as char, brook trout and a rare freshwater species are found in Lake Okutadamiko. Surrounding mountains are covered with broadleaf forests of Fagus crenata. Okunikko: An area in the northwest of Tochigi Prefecture, centering on Lake Chuzenjiko (1,269 m), Senjogahara area (1,400 m) and Yumoto district (1,500 m), also includes such neighboring mountainous areas as Mt Shiranesan (2,578 m) and Mt Nantaisan (2,486 m). The site has a variety of trees in the broadleaf deciduous forests and in conifer forests. It also includes such diversified environment as lakes (Lake Chuzenjiko and Yunoko), mountain streams (Yukawa), wetlands (Senjogahara), grasslands formed from dried marshlands (Odashirogahara). Okutone: This area has the headwaters of Tonegawa river. The climate of the Japan Sea side has a significant impact on this area, and mountainous areas are covered with snow for more than half a year. Floras show elements of the Japan Sea side, while faunas in the primary natural environment include larger mammals (Asiatic black bear, Japanese serow), northern avian species, Grey Bunting, Grey-spotted Flycatcher, and butterflies, as well as aquatic insects, and fish in low temperature streams.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Okutadami, Okunikko and Okutone mountains. Downloaded from on 06/07/2022.