Yu no Tani Onsen (Ehime)
- Location
- Iyo, Ehime Prefecture, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Yu no Tani Onsen in Ehime Prefecture—Valley of Hot Water—is a simple-siliceous spring on the island of Shikoku, where thermal waters emerge within the forested valley landscape of western Japan's mountainous interior, far from the crowds of the main island's famous resort towns. Shikoku is renowned for its 88-temple Buddhist pilgrimage circuit, and springs like Yu no Tani have historically served as resting points for henro (pilgrims) walking the ancient route, their feet and spirits equally in need of restoration. The siliceous waters provide a smooth, skin-nourishing bath experience that complements the spiritual renewal sought by those traversing this sacred island landscape.