According to Ministry of the Environment statistics, Osaka (Kinki) has 17 onsen areas and 173 hot-spring sources. This page lists 13 onsen in Osaka with their water types. The most common water type among them is Radium Spring (4 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 |
|---|---|---|
| Radium Spring | 4 | 31% |
| Chloride Spring | 3 | 23% |
| Bicarbonate Spring | 3 | 23% |
| Simple Thermal Spring | 1 | 8% |
| Sulfur Spring | 1 | 8% |
| Carbon Dioxide Spring | 1 | 8% |
| Facility | Water Type |
|---|---|
| Minoh Onsen Day-Bathing Facility A day-use bathing facility in the Minoh Onsen area, known for Minoh Falls. | Simple Thermal Spring Simple spring |