Akasaki Onsen
- Location
- Nanto, Toyama, Japan
- Water type
- iron-rich
- Temperature
- 38 °C
- pH
- 6.3
Water profile
Soothing — neither hot nor cold, perfect balance.
Rich in active gases or metals — a strong mineral character.
Soft water — natural, classic buoyancy.
Akasaki Onsen—the Red Cape Spring—takes its name from the distinctive reddish coloration of the promontory or headland from which its ferruginous waters emerge, the iron oxide staining of the surrounding rock providing a visible geological announcement of the high iron mineral content of the spring that erupts from this characterfully colored geological feature. Ferruginous springs are valued in Japanese balneology for their blood-building and circulatory properties, with iron compounds in the water recommended in Japanese therapeutic tradition for those recovering from fatigue, poor circulation, or conditions associated with iron deficiency. The red promontory from which Akasaki draws both its name and color is itself a geological billboard, announcing the mineral richness of the spring through the visible chemistry written on the landscape.