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Ina Onsen Komagane

Komagane, Nagano (Chubu), Japan
Ina Onsen Komagane
Location
Komagane, Nagano (Chubu), Japan
Water type
sodium chloride
Temperature
41 °C
pH
7.3

Water profile

Thermicity
Sedative
41 °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

Ina Onsen Komagane is a thermal facility in Komagane City in the Ina Valley of Nagano Prefecture, a community situated directly below the Central Alps (Kiso Mountains) whose dramatic east face towers over the city and provides the setting for the Sengoku Ropeway, Japan's highest-altitude aerial tramway, which ascends to the Senjoujiki Cirque at 2,611 meters, a spectacular glacial basin of arctic-alpine wildflower meadows and pristine mountain tarns designated a National Special Natural Monument and considered one of the most accessible high-alpine wilderness experiences in Japan. The Ina Valley's distinctive culture includes the Jomon archaeological sites preserved in the valley's alluvial deposits, the traditional craft of silk weaving using Ina's historically important sericulture industry, and the local Komagane beef and sauce-katsu don (deep-fried pork cutlet on rice with distinctive sauce) beloved as the city's signature culinary contribution. The chloride thermal spring waters here provide warming recovery after high-altitude adventures in the Central Alps, making Komagane a destination that combines Japan's most dramatic and accessible alpine scenery with the comfortable pleasures of traditional valley hot spring culture.

Insider tip — Perched on the eastern apron of the Komagatake massif in the Central Alps, this onsen channels a saline sodium-chloride spring known for its warming after-soak effect. The ropeway to Senjojiki Cirque departs minutes away, making a post-hike soak here a natural ritual. Mist clings to the valley on autumn evenings, creating an otherworldly atmosphere. Book a window-side bath for unobstructed views of the alpine wall.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 41 °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).