Host: The Association of Japanese Geographers
Name : Annual Meeting of the Association of Japanese Geographers, Spring 2025
Date : March 19, 2025 - March 21, 2025
The limestone that occurs at Hiranesaki on Sado Island in Niigata Prefecture is not an accretionary complex, but rather a locally formed cold-water carbonate deposit. There have been no reports of coastal karst occurring on the Sea of Japan side , and there have also been no reports of karst topography in Japan formed by cold-water calcareous sandstone.
Hiranesaki is a place where potholes are distributed and is designated as a natural monument, “Hiranesaki's wave-eroded pothole group”, and is a place that could become a model site for coastal karst in Japan. Furthermore, these landforms are not formed by accretionary limestone, as seen in karst in other regions of Japan, but by locally-formed cold-water carbonate sediments, which is also a major characteristic of the coastal karst of Hiranesaki.
