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Unose Onsen

Minakami, Gunma, Japan
Unose Onsen
Location
Minakami, Gunma, Japan
Water type
thermal
Temperature
40 °C
pH
7.3

Water profile

Thermicity
Sedative
40 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Balancing
LowHigh

Rich in trace elements — gentle on the skin.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesCalcium

Unose Onsen—Cormorant Ledge or Swift Rapids Spring—takes its name from a riparian landscape feature where the double image of cormorant fishing birds perched on rocky ledges above swift-moving water combines two of the most evocative elements of Japan's mountain river aesthetic tradition: the dynamic energy of rapids and the patient, skilled presence of the fishing bird. Simple alkaline waters offer the gentle, accessible mineral soak that provides rest and recovery alongside the dynamic river imagery of the spring's name in Gunma Prefecture's mountain river landscape. The cormorant ledge name gives this spring a quality of alert, active natural presence—the stillness of the bathing body contrasted with the dynamic river energy and the diving skill of the cormorant who finds its sustenance in the same waters.

Insider tip — Unose Onsen flows along the Tone River corridor in northern Gunma, a region where thermal springs have served mountain travelers and loggers since the Edo period. The clear, neutral-pH water is exceptionally gentle, often recommended for sensitive skin and convalescent bathing. In winter, snow-capped peaks reflected in the outdoor baths create an iconic Japanese winter onsen scene.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).