Lakeside Hotel Kuore

Lakeside Hotel Kuore is a small stay on the shore of Sohara lake in Kitashiobara, and the sauna is what people come for. Reviewers describe an airtight sauna room that climbs from warm to properly hot, plus a tent sauna, and the lake itself serves as the cold plunge. In winter, with the lake frozen, there is an ice-hole dip. Mount Bandai shows clearly from the grounds. Some visitors come just for a day of sauna, and others stay overnight with family or a dog, with breakfast getting good mentions. It is not clear that there is any hot-spring bath here, so think of it as a sauna stop rather than an onsen visit.