Iida Onsen Nagano
- Location
- Iida, Nagano (Southern Alps foothills), Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Iida Onsen is a vibrant hot spring facility in Iida city, the main urban center of southern Nagano Prefecture's Ina Valley region, a city celebrated throughout Japan for its spectacular cherry blossom-lined streets and its centuries-old Bunraku puppet theater tradition recognized by UNESCO as a Intangible Cultural Heritage. The bicarbonate thermal waters are gentle and skin-softening, providing a restorative retreat in a city whose deep cultural identity is rooted in agriculture, festival, and traditional performing arts. The dramatic landscape of the southern Ina Valley, framed by the Minami Alps and Chuo Alps ranges visible from the city's terraced hillsides, adds grandeur to the setting of this culturally rich southern Nagano onsen.