Kitayuzawa Onsen

Hokkaido's biggest onsen town, fed by the steaming Jigokudani ('Hell Valley') crater. Nine different spring chemistries within walking distance.

Caldera-lake onsen at the foot of the still-active Mount Usu, inside the Tōya-Usu UNESCO Geopark. Nightly summer fireworks over the lake.

Sapporo's mountain onsen, an hour from the city in the Toyohira river gorge. Sodium chloride springs and 60+ ryokan along a wooded canyon.

World-famous ski-and-onsen region in southwest Hokkaido, with deep powder snow, Mount Yōtei views, and a string of onsen (Niseko-Konbu, Yumoto, Goshiki, Hirafu) tucked into the foothills.