JP015
Kiritappu marsh, Biwase bay


Country/territory: Japan

IBA Criteria met: A1, A3 (2004)
For more information about IBA criteria please click here

Area: 9,300 ha

Protection status:

Wild Bird Society of Japan
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 medium not assessed low
For more information about IBA monitoring please click here


Site description
Kiritappu marsh is the second largest peat bog (3,168 ha), after Kushiro Shitugen, on the coastline of eastern Hokkaido. The central area is high moor and has been designated as a Natural Monument. A 4km belt of woods around the marsh captures the mist from the marsh, so a selection of flowers, such as Eriophorum varinatum and Hemerocallis middendorffii can be seen. Also, this site is known as an important breeding ground of A Special Natural Monument, the Japanese Crane. Together with neighboring Hichirippunuma and Mochirippunuma, this area is a Ramsar site. Kiritappu marsh faces Hamanaka bay and Biwase bay on the Pacific Ocean. There are Touhutsushima islet and Kenbokkishima islet and Kojima islet in Biwase Bay. Kenbokkishima and Kojima islets are important nesting sites for sea birds as these islets are not inhabited by people. Kojima islet has one of few colonies of Tufted Puffin in Japan, and Kenbokki islet is a large scale nesting site for Leach's Storm-petrel.


Recommended citation
BirdLife International (2018) Important Bird Areas factsheet: Kiritappu marsh, Biwase bay. Downloaded from http://www.birdlife.org on 16/12/2018.