Iinan Onsen Shimane
- Location
- Iinan, Shimane, Chugoku, Japan
- Water type
- bicarbonate
- Temperature
- 41 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Iinan Onsen is located in the Inan district of Shimane Prefecture in the San'in region of western Honshu, where bicarbonate thermal springs draw from geological formations in the interior mountain landscape of a prefecture known throughout Japan for its exceptional concentration of ancient Shinto shrines, including the 1,300-year-old Izumo Taisha Grand Shrine—one of Japan's holiest and most ancient sacred places. The alkaline bicarbonate mineral composition of Iinan's thermal waters is valued in Japanese onsen culture for skin-softening properties and the calming, restorative effects that complement the spiritual atmosphere of a region where the gods of Japanese mythology are said to gather every October to discuss human fates and marriages. The San'in landscape's misty mountains, ancient shrine forests, and the traditional Iwami Kagura masked dance performances that celebrate the mythological traditions of the Izumo region frame Iinan Onsen within one of Japan's most historically and spiritually resonant cultural landscapes.