Sakunami Onsen Iwamatsuryo

Iwamatsuryo has been operating since the Edo period and features open-air baths carved into the natural rock face overlooking the Hirose River. The descent to the baths involves a long staircase through forested hillside, adding to the sense of discovery. Day bathing is available, and the mineral-rich alkaline waters are known locally for their skin-softening properties.