Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
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.