Jigokudani (Hell Valley)

Jigokudani (地獄谷, or Hell Valley) is a captivating volcanic area located just above Noboribetsu Onsen, renowned for its active geothermal features. The valley is famous for its sulfurous streams, hissing steam vents, and other volcanic activities, all of which contribute to the hot spring waters that flow into Noboribetsu’s baths. Visitors can explore a variety of walking trails that wind through the lush wooded hills surrounding the valley, providing stunning views of the geothermal landscape. One of the highlights is Oyunuma, a sulfuric pond located about a 20-30 minute walk from the valley. The pond’s surface temperature reaches 50°C, making it an impressive natural feature. A smaller mud pond nearby is even hotter, adding to the area’s unique and otherworldly atmosphere.

The Oyunumagawa River flows out of Oyunuma Pond, carrying warm waters through the surrounding forest, creating a serene and exceptional natural experience. Visitors can follow the river for hundreds of meters, dipping their feet into the warm waters along the way for a relaxing natural foot bath. The area is especially popular during autumn, when the vibrant colors of the foliage create a breathtaking landscape, with peak foliage occurring in mid-October. In winter, some of the trails may be inaccessible due to snow, but the snow-covered landscape offers a peaceful and picturesque setting for those who still wish to visit.