816. Ishinoyu, Shibu Onsen, Nagano ★ Onsen for ¥600. The stated hours are 10:00~18:00 (except Tuesday). The place has an old-school feel, is pleasant, and in good condition. Indoor area. Stone bath, divided into two sections. The water is clear. In terms of temperature, one section of the bath is 45.5-46, and the other is 50.5. It feels a bit stuffy inside. For those who like very hot water. 16.01.2026
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