According to Ministry of the Environment statistics, Niigata (Chubu) has 135 onsen areas and 536 hot-spring sources. This page lists 65 onsen in Niigata with their water types. The most common water type among them is Chloride Spring (21 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 |
|---|---|---|
| Unknown | 26 | 40% |
| Chloride Spring | 21 | 32% |
| Simple Thermal Spring | 6 | 9% |
| Bicarbonate Spring | 6 | 9% |
| Sulfur Spring | 4 | 6% |
| Sulfate Spring | 1 | 2% |
| Other | 1 | 2% |
| Facility | Water Type |
|---|---|
| Niitsu Onsen | Chloride Spring Iodine-bearing sodium – chloride/bicarbonate spring |
| Senju Onsen Sennen no Yu | Unknown |
| Kandachi no Yu | Simple Thermal Spring Alkaline simple spring |
| Yama no Yu A communal bathhouse in Echigo-Yuzawa Onsen, an old-style bathhouse used by locals and travelers alike. | Sulfur Spring Simple sulfur spring |
| Name | What kind of onsen |
|---|---|
| Akayu Onsen Details | A lone lodge along the hiking trail to Mt. Tairappyo and Mt. Senjokura, reached by about a 3-hour walk from the end of the forest road; a remote mountain hot spring requiring camping gear. |
| Renge Onsen Details | The lodge Renge Onsen Lodge sits at 1,475m northeast of Mt. Shirouma. Visitors can tour four rustic open-air baths scattered on the hillside behind it; it operates only during a limited season. |
| Onsen Town | Summary |
|---|---|
| Renge Onsen Geopark | A single-inn hot spring at 1,475m elevation within the Itoigawa Geopark, certified a Japan Geopark in 2009 and a UNESCO Global Geopark in 2018. It has four open-air baths of differing water types — simple acidic, bicarbonate, and sulfate springs among them — and is featured on the geopark's own site as a place to experience the geology of the Fossa Magna's western edge. Details |