Horoshin Onsen
Illustration photo — not a verified picture of this exact spot.
- Location
- Shibetsu, Hokkaido, Japan
- Water type
- calcium-rich
- Temperature
- 44 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Horoshin Onsen is a sulfated thermal spring in Japan, its mineral-rich waters carrying calcium and magnesium sulfate compounds that have long been valued in Japanese bathing tradition and prized for the smooth, skin-conditioning quality that sulfate springs leave after an extended soak. The name Horoshin suggests a spring of wide-reaching or wandering character—perhaps naming the expansive landscape through which its waters travel before surfacing—a quality reflected in the generous, enveloping warmth of sulfate thermal bathing. This spring offers bathers Japan's volcanic sulfate tradition within an atmosphere of unhurried, nature-immersed calm.