Yamaguchi


Akiyoshidai

photography
River passage in Akiyoshido, 1975. Public Domain.

The karst plateau of Akiyoshidai is the largest karst area of Japan. The plateau is a Quasi National Park (Shuho-cho), the caves are Natural Monuments. It is also a National Geopark, a Ramsar Site and wetland of international importance.

The Paleozoic limestone of this area is a petrified coral reef.