Sounkyo Choyotei Daisetsuzan

Sounkyo Choyotei in Kamikawa, Hokkaido, draws sulfate-rich thermal waters from the Sounkyo Onsen resort inside Daisetsuzan National Park — Japan's largest national park and the 'Roof of Hokkaido,' where the volcanic Daisetsuzan massif produces extraordinary natural phenomena including Japan's earliest autumn foliage (late September at high elevation), breeding Blakiston's fish owls (the world's largest owls), and the dramatic Sounkyo and Oodaki gorges where waterfalls cascade 130 meters from basalt columnar cliffs. The geothermal system feeding Sounkyo's onsen is driven by the same volcanic basement as the Daisetsuzan calderas, producing sulfate waters with therapeutic potency appropriate to a wilderness resort that caters primarily to serious Hokkaido hikers and nature enthusiasts rather than urban escapees. The Sounkyo gorge ice fall (Hyōbaku) illumination festival in winter, when colored lights play on frozen waterfalls within the volcanic gorge, creates one of Hokkaido's most spectacular winter experiences alongside the therapeutic sulfate thermal bathing.