According to Ministry of the Environment statistics, Nagasaki (Kyushu & Okinawa) has 37 onsen areas and 203 hot-spring sources. This page lists 10 onsen in Nagasaki with their water types. The most common water type among them is Chloride 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 |
|---|---|---|
| Chloride Spring | 4 | 40% |
| Bicarbonate Spring | 4 | 40% |
| Sulfur Spring | 1 | 10% |
| Other | 1 | 10% |
| Facility | Water Type |
|---|---|
| Iimori Tsuki no Oka Onsen | Unknown |
| Kojigoku Onsenkan A day-use bathing facility near Unzen Jigoku, known for its milky-white sulfur spring. | Sulfur Spring Acidic sulfur spring |
| Onsen Town | Summary |
|---|---|
| Unzen Onsen Geopark | The core hot spring area of the Shimabara Peninsula Geopark, which in 2009 became Japan's first UNESCO Global Geopark. Unzen Jigoku also has a history as a site of execution during the persecution of Christians in the Edo period. Details |