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Komaba Onsen

Komaba, Nagano, Japan
Komaba Onsen
Location
Komaba, Nagano, 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

Komaba Onsen—Small Paddock Spring—takes its name from the komaba, the modest, enclosed field or paddock where young horses or small livestock are kept, an agricultural naming that evokes the intimate, human-scaled character of a spring embedded in the working landscape of Nagano Prefecture's mountain farming communities rather than in a spectacular volcanic wilderness or grand resort setting. Simple alkaline waters provide the gentle, accessible mineral soak that forms the foundation of Japan's community-rooted thermal bathing tradition, and the small paddock name frames this Nagano spring as a spring of modest, unpretentious character—a spring that serves its local community rather than aspirational resort visitors seeking dramatic landscapes or exotic mineral compositions. The agricultural paddock name grounds this spring in the everyday rural life of Nagano's highland farming communities.

Insider tip — Komaba Onsen lies in the southern part of Nagano Prefecture near the Aichi border, tapping into mild alkaline thermal springs that rise from granite-rich bedrock. The clean, colourless water has a gentle, non-irritating quality that makes it popular with families and older visitors. The intimate scale of this onsen and its surroundings of forested mountains typify the quiet, rural hot spring culture of the Shinshu region.
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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).