Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Yugashima Onsen is a secluded mountain thermal resort deep in the Kano River valley of the Izu Peninsula in Shizuoka Prefecture, where siliceous hot spring waters emerge from the volcanic geology of the Izu-Bonin Arc within the cedar-forested interior hills of this subtropical peninsula projecting into the Pacific Ocean. The writer Yasunari Kawabata, Japan's first Nobel Prize laureate for literature, loved Yugashima and set parts of his celebrated story The Izu Dancer here, visiting the onsen village repeatedly in the 1920s and 1930s — giving the spa a literary resonance that continues to attract visitors seeking the melancholic, tender atmosphere that Kawabata captured in his prose. The combination of siliceous waters, deep valley forest, literary heritage, and the extraordinary Izu Peninsula landscape of volcanic calderas, ocean views, and subtropical flowers makes Yugashima one of Shizuoka's most culturally resonant traditional onsen destinations.
Insider tip — Yugashima Onsen occupies a forested river valley in the heart of the Izu Peninsula, its bicarbonate-sodium waters rising through ancient Izu volcanic rock. The resort inspired Kawabata Yasunari's early writings, and its literary heritage is celebrated throughout the inn district. The Kano River rushing past the ryokan creates a soothing soundtrack for outdoor rotenburo baths at around 40°C. A hiking trail above town leads through cryptomeria forest to views of Mt. Fuji on clear winter mornings.