Sumoto Onsen
- Location
- Sumoto, Awaji Island, Hyogo (Kansai), Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Soft water — natural, classic buoyancy.
Sumoto Onsen is a thermal facility in Sumoto city, the main city of Awaji Island in Hyogo Prefecture — the large island in the Seto Inland Sea between Kobe and Shikoku, celebrated in Japanese mythology as the first land created by the gods Izanagi and Izanami. The siliceous hot spring waters of Sumoto emerge from the island's ancient geology, providing skin-softening bathing that complements a city known as the center of Awaji Island's famous onion farming, fresh seafood, and Awaji ningyo puppet theater — a UNESCO Intangible Cultural Heritage. Bathing in Sumoto's siliceous waters offers a distinctly island-flavored Japanese onsen experience, where the gentle maritime landscape of the Inland Sea and the rich cultural heritage of Awaji Island provide an extraordinary setting for thermal relaxation.