Tomamu Hoshino Spa Tower Hokkaido
- Location
- Shimukappu, Hokkaido, 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.
Tomamu Hoshino Spa Tower Hokkaido draws bicarbonate-rich geothermal water in the Hoshino Resorts Tomamu complex in the Shimukappu valley of central Hokkaido — the same resort that created the extraordinary 'cloud sea' (unkai) terrace phenomenon, where a gondola lifts guests above the valley mist at dawn to stand in crisp highland air above an infinite sea of white cloud with volcanic peaks emerging as islands above the thermal inversion. The spa tower's design — a vertical stack of different thermal bathing environments including a forest onsen and indoor-outdoor mixed baths — combined with Tomamu's winter powder skiing and the summer Ice Village concept (an entire ephemeral village of ice structures rebuilt annually) creates a four-season resort where geothermal bathing is embedded in Japan's most inventive resort-design thinking. The bicarbonate spring waters, heated by Hokkaido's extensive volcanic geology, are appreciated within a long thermal tradition for relaxation and the comfort of the skin in facilities that represent the premium tier of Japanese resort thermal infrastructure.