According to Ministry of the Environment statistics, Toyama (Chubu) has 61 onsen areas and 169 hot-spring sources. This page lists 80 onsen in Toyama with their water types. The most common water type among them is Chloride Spring (33 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 | 33 | 41% |
| Simple Thermal Spring | 16 | 20% |
| Sulfur Spring | 11 | 14% |
| Unknown | 6 | 8% |
| Bicarbonate Spring | 4 | 5% |
| Other | 4 | 5% |
| Sulfate Spring | 2 | 2% |
| Carbon Dioxide Spring | 2 | 2% |
| Iron Spring | 2 | 2% |
| Name | What kind of onsen |
|---|---|
| Takamagahara Onsen Details | Known as 'Japan's most remote hot spring,' located deep in the Northern Alps at the headwaters of the Kurobe River. Reaching it on foot from the nearest trailhead takes 2–3 days via mountain huts. |
| Onsen Town | Summary |
|---|---|
| Unazuki Onsen Geopark | One of the gateways to the Tateyama–Kurobe Geopark. The water at Unazuki Onsen is piped in from the source at Kuronagi Onsen, about 6.5km up the Kurobe Gorge; the geopark's visitor center at the station, "Una-geo," explains how the area's geology came to be. Details |
| Asohara Onsen Literature | Building the headrace tunnel for the Kurobe River No. 3 Power Station (1936–1940) turned into a brutal ordeal when construction crews hit a zone of bedrock reaching up to 166°C, and dynamite igniting spontaneously from the heat killed many workers. Yoshimura Akira's novel Kōnetsu Zuidō ("The High-Heat Tunnel," 1967) is based on this construction. Asohara Onsen, which wells up right at the tunnel's exit, draws its water from that same superheated bedrock, and still holds around 40°C today. Details |