The San'in Kaigan Geopark (山陰海岸ジオパーク) is a geopark in Japan. The area was declared a Japanese Geopark in 2008, and a UNESCO Global Geopark in 2010. The underlying themes of the Geopark are "geological features, the natural environment, people's lives, and the formation of the Sea of Japan". This geologically diverse area contains records of the process from when Japan was part of the Asian continent to its present-day formation of the Sea of Japan. People's lives are also diverse in this area because of its geodiversity.