Otari Onsen Nagano
- Location
- Otari, Nagano (Hida Mountains), Japan
- Water type
- bicarbonate
- Temperature
- 42 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Otari Onsen is a remote mountain hot spring in Otari village, situated in the extreme northern part of Nagano Prefecture at the foot of the Hakuba mountain range on the border with Niigata Prefecture, within the Chubu Sangaku National Park — one of Japan's most celebrated alpine regions for ski touring, mountaineering, and nature observation. The bicarbonate thermal waters provide soothing warmth and skin-softening benefits that are especially welcome after skiing or hiking in Otari's rugged mountain terrain, which includes access to the Tsugaike Kogen highland plateau and its renowned wildflower meadows in summer. The village's traditional Shinshu rural character, with deep snowfall in winter and brilliant mountain wildflower seasons in summer, makes Otari Onsen a destination of genuine alpine authenticity.