- Kiritappu Wetland is a mire with an area of 3168ha, located in Hamanakacho, a town in eastern Hokkaido.
- It is the third largest wetland in Japan. The Kiritappu Wetlands were designated as a site of international importance by the Ramsar convention in 1993.
- From northwest to south of the mire along the coastline of Hamanaka Bay, Shinkawa River, Dorokawa River, and Biwasegawa River run through it in parallel, accompanying a series of small narrow ponds including Junsai-numa, Onuma, Naganuma, Konuma, and Korikirinuma.
- The topography has been developed through the process after a coastline retreat at the end of the glacial age:a row of sand dunes was built along the new coastline, ponds were created in their hinterland, and the mire was formed.
- In 1993, Kiritappu-Shitsugen total area of 2504ha with the core area 2030ha plus Lake Hichirippu and Lake Mochirippu 474ha, was designated as a site of international importance by the Ramsar Convention.
- Of the core area, 803ha was designated as a National Natural Monument in 1922, recognized its value for having peat-forming plant communities.
- Kiritappu Wetland National Trust
Nakanohama, Hamanaka-cho, Akkeshi-gun, Hokkaido, Japan