Oku Tsumagoi Onsen
- Location
- Tsumagoi, Gunma Prefecture, 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.
Oku Tsumagoi Onsen is a hot spring in Tsumagoi Village, Agatsuma County, Gunma Prefecture, in the volcanic highland zone of this thermally exceptional prefecture, providing bicarbonate mineral bathing to visitors of the Tsumagoi plateau area known for its vast fields of cabbage cultivation that create a stunning patchwork landscape across the highland meadows in summer and autumn. Tsumagoi Village, situated at approximately 1,000 meters elevation on the volcanic plateau north of Kusatsu Onsen, is one of Japan's largest producers of cabbage and other highland vegetables, and its dramatic agricultural landscape of green terraces climbing across the volcanic foothills makes it a distinctive and visually compelling destination within the rich tourism region of western Gunma. The bicarbonate waters of Oku Tsumagoi Onsen provide restorative bathing for visitors to this highland agricultural and recreational destination, combining the thermal wellness tradition of Gunma's hot spring heritage with the fresh mountain air and spectacular pastoral scenery of the Tsumagoi plateau.