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Kiryu Onsen Gunma

Kiryu, Gunma, Japan
Kiryu Onsen Gunma
Location
Kiryu, Gunma, Japan
Water type
bicarbonate
Temperature
41 °C
pH
8

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
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Kiryu, in eastern Gunma Prefecture bordering Tochigi, is historically Japan's most important silk weaving city — the traditional centre of Kiryu ori silk textile production whose elaborate figured fabrics were prized alongside Nishijin silk in Kyoto as the finest woven goods in Edo-period Japan — a heritage preserved in the Kiryu Textile Museum and the traditional weaving workshops still operating in the old silk merchant townscape. Kiryu Onsen Gunma draws on sodium and bicarbonate thermal waters from the geological resources of the Kiryu basin, offering restorative baths in a city whose centuries of textile expertise and the beautiful Kiryu River valley create an attractively textured spa destination combining industrial heritage with natural scenery. The Kiryu Textile Museum's comprehensive documentation of silk weaving technology, the Kiryu Tenshin Sai festival celebrating the weaving tradition, and the traditional machiya townscape of the old silk merchant district along the Kiryu River make this one of Japan's most important industrial heritage spa destinations in the eastern Kanto mountains.

Insider tip — Kiryu, historically famed as a silk-weaving town, also harbors a gentle bicarbonate thermal spring drawn from deep Kanto basin sediments. The alkaline water has a reputed beautifying effect on skin, earning it the local nickname 'bijin-no-yu' or beauty water. After bathing, explore the preserved Meiji-era textile merchant quarter just a short walk from the bathhouse.
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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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).