Mt. Myojo

Kotakigawa Jade Gorge Geosite - Itoigawa Global Geopark

In 1940, Kotaki Jade Gorge was discovered to be the first natural source of jade in Japan. This had a profound effect on the fields of archaeology and geology. It was at this point when scientists confirmed that jade artifacts found in archaeological sites all over Japan originated in Itoigawa, which would from that point on be called The Birthplace of Jade.

The giant stone wall of Mt. Myojo that towers over the gorge was formed about 300 million years ago from petrified coral reef—many coral and sea lily fossils can be found within its rock. When the weather is fair, this wall is a popular challenge for rock climbers. Below Mt. Myojo, one can see large deposits of jade washed by clear waters of the Kotaki River. The colors of changing seasonal foliage paint a beautiful scene on the white walls of Mt. Myojo, making the view here breathtakingly beautiful.

Nearby Takanami no ike Pond, produced by a landslide from Mt. Akahageyama, is said by locals to be the home of a giant fish they've named 'Namitaro.' Behind the pond are the remains of the Kotaki Coalmine, which operated during the first half of the 20th century. The pond itself is a very popular space for fishing, walking, picnicking, or just relaxing with family and friends.

Itoigawa Global Geopark - Kotakigawa Jade Gorge Geosite