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Tanba-Sasayama Onsen Hyogo

Tanba-Sasayama, Hyogo, Japan
Tanba-Sasayama Onsen Hyogo
Location
Tanba-Sasayama, Hyogo, 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

Tanba-Sasayama, the historic castle town at the centre of the Tamba highlands in Hyogo Prefecture, is celebrated for its beautifully preserved Edo-period townscape, traditional black-walled merchant houses, and the graceful earthwork castle site originally built by Tokugawa Ieyasu in 1608 using the labour of dozens of feudal lords as a dramatic display of overwhelming political and organisational power. Tanba-Sasayama Onsen Hyogo draws on sodium and bicarbonate thermal waters from the geothermal resources of the Tamba basin, offering restorative baths that complement the cultural immersion provided by this remarkably well-preserved castle town whose traditions of black soybean cultivation, Tamba weaving, and artisan ceramic production create a deeply Japanese rural heritage experience. The Kawaramachi historic street lined with sake breweries and traditional merchant houses, the wild boar cuisine of the Tamba highlands, and the autumn black soybean harvest transforming the surrounding farmland into a tableau of traditional Japanese agriculture make Tanba-Sasayama one of the most evocative thermal spa destinations in the Kinki region.

Insider tip — Tanba-Sasayama, sometimes called Sasayama, is a well-preserved castle town in the Tamba Basin where bicarbonate springs complement the town's heritage atmosphere. The waters are softly alkaline, favored for skin conditioning and muscle relief after exploring the historic merchant district. The grid layout of Edo-period streets survives largely intact, giving the town a rare architectural coherence. Combining a stroll through the old town with an onsen visit at dusk offers a richly layered experience.
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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).