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Inawashiro Onsen Fukushima

Inawashiro, Fukushima, Japan
Inawashiro Onsen Fukushima
Location
Inawashiro, Fukushima, 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

Inawashiro Onsen Fukushima is located in Inawashiro Town, Fukushima Prefecture, on the shores of Lake Inawashiro — Japan's fourth largest lake and the 'Heaven's Mirror Lake' (Tenkyoko), whose exceptionally clear waters reflect the volcanic peaks of the Bandai mountain range and Azuma volcanoes in views of extraordinary scenic grandeur, and which serves as a staging area for hundreds of thousands of migratory whooper swans that winter on its shores in one of Japan's most spectacular wildlife spectacles. The chloride-rich thermal waters draw from the geothermal resources of the Bandai volcanic area, one of the most geologically active and scenically dramatic zones of the Tohoku highlands, providing warm mineral baths framed by views of the lake and volcanic peaks that define Fukushima's central highland landscape. Inawashiro is also the birthplace of Noguchi Hideyo — the bacteriologist who isolated the pathogen responsible for syphilis and contributed to research on yellow fever — whose childhood home near the lake is a Japanese pilgrimage site for scientists and educators, adding intellectual heritage to this scenic volcanic onsen destination.

Insider tip — Inawashiro sits beside Japan's fourth-largest lake, Lake Inawashiro, in the heart of Fukushima's Aizu region. The bicarbonate-rich spring waters here are known for their gentle skin-softening quality, fed by underground flows from the surrounding mountain ranges. The spa town is the birthplace of Dr. Hideyo Noguchi, and his memorial museum nearby adds cultural depth to a bathing visit. Winter views of the snow-capped Bandai volcano across the lake are breathtaking from outdoor baths.
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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 (idéal automne-hiver).