According to Ministry of the Environment statistics, Okayama (Chugoku) has 32 onsen areas and 221 hot-spring sources. This page lists 15 onsen in Okayama with their water types. The most common water type among them is Simple Thermal Spring (9 onsen).
Source: Ministry of the Environment, FY2024 Hot Spring Utilization Survey (as of March 31, 2025). Best-known onsen = most annual Wikipedia views.
| Water Type | Count | Share |
|---|---|---|
| Simple Thermal Spring | 9 | 60% |
| Radium Spring | 5 | 33% |
| Chloride Spring | 1 | 7% |
| Facility | Water Type |
|---|---|
| Sunayu A free mixed-bathing open-air bath welling up on the riverbank of the Asahi River, one of the finest in western Japan and symbolic of Yubara Onsen. | Simple Thermal Spring Simple spring |