Murasugi Onsen
- Location
- Niigata, Niigata, Japan
- Water type
- carbonated
- Temperature
- 38 °C
- pH
- 6.3
Water profile
Soothing — neither hot nor cold, perfect balance.
Loaded with major ions — the essential minerals (Ca, Mg).
Mineralised water — eases movement and joints.
Murasugi Onsen flows with carbonated and simple thermal waters, combining the effervescent, skin-tingling quality of dissolved carbon dioxide with the gentle accessibility of simple-type geothermal water to produce a bathing experience that balances the sensory novelty of natural carbonation with the meditative warmth of uncomplicated thermal immersion. The coexistence of carbonated and simple mineral characteristics reflects the geological complexity of the volcanic formation through which the spring's water rises, where carbon dioxide from deep volcanic or magmatic sources dissolves into lightly mineralized groundwater to create this distinctive dual-character spring. Murasugi Onsen represents the pleasantly surprising dimension of Japan's onsen heritage, where a spring whose name suggests a quiet, tree-shaded valley delivers an effervescent thermal bathing experience that transforms the familiar warmth of a simple hot spring into something distinctly more lively and physically stimulating.