Yachiyo Onsen
- Location
- Kanna, Gunma, Japan
- Water type
- bicarbonate, carbonated
- Temperature
- 40 °C
- pH
- 6.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Mineralised water — eases movement and joints.
Yachiyo Onsen—Eight Thousand Generations Spring—takes its name from the most expansive expression of eternal time in Japanese culture: yachiyo, literally eight thousand generations, a phrase invoking the longest possible future continuity and the enduring quality of something that will persist across countless human lifetimes and beyond. The bicarbonate and carbonated waters deliver an effervescent mineral soak in which the natural CO2 adds lively stimulation to the gentle alkaline warmth—a spring whose mineral character is as refreshingly alive as its name is timelessly enduring. Rising in Gunma Prefecture's volcanic landscape, this spring connects the immediate physical pleasure of mineral bathing to the deepest Japanese aspiration for continuity and enduring natural vitality.