Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
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Soft water — natural, classic buoyancy.
CalciumSulfatesMagnésium
Nakaizu Onsen Izu is a hot spring destination in the Nakaizu area of Izu City, Shizuoka Prefecture, Japan, situated in the central mountains of the Izu Peninsula — one of Japan's most celebrated thermal regions, where over 2,000 springs have been catalogued across a rugged volcanic landscape jutting into the Pacific Ocean south of Tokyo. The calcium-rich waters here are characteristic of the Izu inland thermal zone and are valued within an onsen culture associated with skin comfort and muscle relaxation that has flourished on the Izu Peninsula since at least the 10th century. Surrounded by mountain forests and the serene rural landscape of the Izu interior, far from the coastal resort crowds, Nakaizu offers a contemplative and authentically local hot spring experience in one of Japan's greatest geothermal regions.
Insider tip — Nakaizu Onsen occupies the forested interior of the Izu Peninsula where volcanic activity has deposited calcium carbonate in the water, producing a milky tint and a notably thick mineral feel on skin. The area is surrounded by wasabi paddies fed by pristine mountain streams, and several ryokan serve locally grown wasabi alongside multi-course kaiseki dinners. The calcium-rich waters are prized for bone and joint health and draw a loyal clientele of elderly regulars.