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Shinshu Nunobiki Onsen; Mimaki no Yu

Tōmi, Nagano, Japan
Shinshu Nunobiki Onsen; Mimaki no Yu
Location
Tōmi, Nagano, Japan
Water type
bicarbonate
Temperature
40 °C
pH
8

Water profile

Thermicity
Sedative
40 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

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

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

In a traditional Japanese onsen, bathers immerse themselves in a serene atmosphere, disconnecting from the world outside. The bathing tradition involves a communal experience, where individuals of all ages and backgrounds come together to cleanse and rejuvenate themselves. Guests typically follow a sequence of purification rituals, including washing, rinsing, and soaking in warm, natural waters, fostering a sense of relaxation, tranquility, and social bonding. This ancient custom emphasizes respect for others and oneself, creating a harmonious environment that encourages mental and emotional well-being.

Insider tip — In the Chikuma River valley of ancient Shinshu (Nagano), where imperial pastures (mimaki) once grazed horses for the Nara court, Nunobiki Onsen draws gentle alkaline bicarbonate waters from the Eastern Alps foothills; the Fuji and Yatsugatake volcanic ranges frame the valley in an expansive panorama unique to this quiet Nagano city.
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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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.