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Yamanouchi Onsen Nagano

Yamanouchi, Nagano, Japan
Yamanouchi Onsen Nagano
Location
Yamanouchi, Nagano, Japan
Water type
sodium chloride
Temperature
42 °C
pH
7.3

Water profile

Thermicity
Sedative
42 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy
Effortless float
LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Yamanouchi, in the northern Nagano highlands along the Nakatsu River valley, is internationally celebrated as the home of the famous snow monkeys of Jigokudani — Japanese macaques who descend from the forested ridge each winter to warm themselves in the natural thermal pools of the valley floor, creating one of the most photographed wildlife spectacles in the entire animal kingdom. Yamanouchi Onsen Nagano draws on chloride-rich thermal waters from the volcanic geology of the northern Nagano mountain zone, providing restorative baths in a village where the snow monkey thermal bathing culture creates a deeply moving parallel to human hot spring traditions that has made Yamanouchi globally famous among wildlife and spa travellers alike. The Jigokudani Monkey Park's winter snow monkey viewing, the Shiga Kogen highland plateau with its extraordinary ski resort network spanning dozens of interconnected runs above the treeline, and the traditional Wakasato and Shibu hot spring village communities make Yamanouchi one of the most internationally recognised and distinctive thermal destinations in the Japanese Alps.

Insider tip — Yamanouchi sits in the valley above Shiga Kogen, where sodium-chloride waters warm bathers to 42°C and leave a subtle salt sheen on the skin that retains heat for hours. The area is famous for snow monkeys bathing in nearby Jigokudani, making this a natural extension of that wildlife experience. Winter visits are particularly dramatic with heavy snowfall framing outdoor rotenburo. Book ryokan well in advance for the ski season.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 42 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).