Awasuno Onsen
Illustration photo — not a verified picture of this exact spot.
- Location
- Toyama, Toyama, 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.
Awasuno Onsen—Foaming Sandbank Spring—takes its name from the foamy, churning water surface created where river currents meet shallow sandbanks, a topographic imagery evoking the carbonated effervescence of the spring's own mineral character—the natural CO2 of carbonated water rising through the thermal waters and creating the foaming, bubbling quality that the sandbank name describes in geological terms. Rising in Toyama Prefecture within the dramatic landscape defined by the Tateyama mountain range and the Kurobe Dam—Japan's highest and most celebrated dam, built at extraordinary human cost through some of the country's most challenging alpine terrain—this spring exists in a landscape of exceptional geological drama and engineering ambition. The carbonated mineral effervescence of Awasuno's foaming sandbank waters provides a naturally animated, skin-stimulating soak that mirrors the dynamic landscape energy of Toyama's magnificent alpine interior.