Minami Izu Onsen

Minami Izu, Shizuoka Prefecture, Japan

Location: Minami Izu, Shizuoka Prefecture, Japan
Water type: silica
Temperature: 42 °C
pH: 7.2

Water profile

Thermicity

Sedative

42 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Balancing

LowHigh

Rich in trace elements — gentle on the skin.

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

SiliceSodiumBicarbonates

Minami Izu Onsen occupies the southernmost tip of the Izu Peninsula, a subtropical microclimate where banana plants and bougainvillea flourish alongside the more familiar pines and cedar of mainland Shizuoka, creating a landscape with a distinctly tropical character unusual for Japan's Pacific coast. Yumigahama beach near the onsen is consistently rated among Japan's most beautiful, its crescent of fine white sand curving between headlands in a setting more reminiscent of Mediterranean coves than the typical rocky Japanese coastline. The geothermal mineral waters here draw from the same volcanic sources that power the entire Izu Peninsula's exceptional spring quality, offering bathing of the highest order in a remote coastal setting that rewards the journey to Japan's subtropical fringe.

Insider tip — Minami Izu occupies the wild southern tip of the Izu Peninsula in Shizuoka, where Pacific-facing coves and hidden valleys shelter some of Izu's most remote onsen. Silica-rich geothermal waters at 42°C emerge along fault lines in the Izu collision zone, where the Philippine Sea Plate drives geothermal heat upward through granitic basement rock. The coastline here is rugged and spectacular, with sea-cave grottos and seasonal whale-shark sightings offshore. Several inns offer rotenburo pools set on clifftops directly above the ocean, so the soundtrack of soaking is pure Pacific surf.

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