Natsuse Onsen
- Location
- Akita, Akita, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Natsuse Onsen is a hot spring resort in Japan whose bicarbonate mineral waters provide the alkaline cleansing and skin-softening properties that characterize this common and well-regarded spring type within the Japanese therapeutic bathing tradition. Bicarbonate springs, also known as alkaline springs, are recognized in Japanese hot spring medicine for their ability to dissolve surface skin proteins gently, resulting in the smooth and velvety skin sensation that has earned this water type the popular description of bijin-no-yu or beauty water among Japanese bathing enthusiasts. The restorative and skin-nourishing qualities of Natsuse Onsen's bicarbonate waters make it an accessible and broadly appealing hot spring destination, providing a gentle yet effective thermal bathing experience in the tradition of Japanese mineral spring wellness culture.