● Tadahara Marsh is located on the north side of the Kuju mountain range (altitude of about 1000 m), and it is a wetland made in an alluvial fan of volcanic topography.
● In the marshland formed in the mountainous area, it was recognized as an important wetland internationally because it has the largest area in the country, and it was registered in the Ramsar Convention in November 2005.
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http://kyushu.env.go.jp/nature/tyojyabaru/tadewara/
