Akaigawa Caldera, Volcanic caldera in Hokkaido, Japan
The Akaigawa Caldera extends across the mountainous region of Hokkaido, featuring distinct geological formations of andesite, dacite, and rhyolite rocks at 725 meters elevation.
The caldera formed through intense volcanic activities between 1.7 and 1.3 million years ago during the Pleistocene epoch, creating the current landscape of the region.
The natural hot springs within the caldera provide traditional Japanese onsen experiences, where visitors can bathe in mineral-rich waters heated by geological activity.
The Akaigawa Caldera Onsen opens daily from 10:00 AM to 9:00 PM, except Mondays, with adult admission at 400 yen and children at 200 yen.
The onsen bathhouse incorporates large glass windows facing a massive rock wall, allowing bathers to observe the geological formations while soaking in 50-degree waters.
Location: Akaigawa
GPS coordinates: 43.08000,140.82000
Latest update: March 8, 2025 20:14
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