Naruto Onsen Hyogo Awaji
- Location
- Naruto, Tokushima, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Naruto Onsen on the Awaji Island side of the Naruto Strait in Hyogo prefecture draws chloride-rich thermal waters near the famous Naruto whirlpools — the world's third-largest tidal whirlpools, formed four times daily as the Inland Sea and Pacific Ocean trade water through the Naruto Strait with exceptional tidal force, creating vortices up to 20 meters in diameter visible from the Uzu no Michi glass-floored walkway suspended beneath the Great Naruto Bridge. The coastal onsen tradition here combines the iodine and mineral richness of Naruto Strait seawater with geothermal spring water in a destination where the extraordinary tidal energy of the world's most powerful tidal current surrounds the thermal bathing with geological drama unique to this specific Seto Inland Sea gateway. Awaji Island's exceptional position between Osaka, Kyoto, and Shikoku — accessible by bridge from all three regions — and its acclaimed Pasona Awaji sustainable farming campus, dramatic Hyōgō coast national park scenery, and the Tomoike Shrine's chrysanthemum garden festival create a sophisticated Awaji wellness experience.