According to Ministry of the Environment statistics, Kanagawa (Kanto) has 36 onsen areas and 602 hot-spring sources. This page lists 30 onsen in Kanagawa with their water types. The most common water type among them is Chloride 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 |
|---|---|---|
| Chloride Spring | 9 | 30% |
| Simple Thermal Spring | 6 | 20% |
| Unknown | 4 | 13% |
| Sulfur Spring | 3 | 10% |
| Bicarbonate Spring | 2 | 7% |
| Sulfate Spring | 2 | 7% |
| Carbon Dioxide Spring | 2 | 7% |
| Other | 2 | 7% |
| Facility | Water Type |
|---|---|
| Lake Sagami MORI MORI | Unknown |
| Yunessun | Unknown |
| Nanasawa Onsen | Simple Thermal Spring Simple spring |
| Iiyama Onsen | Simple Thermal Spring Simple spring |
| Kabutoyu Onsen Sansuiro | Unknown |
| Manten no Yu (Yokohama) A mineral spring meeting the standards of Japan's Hot Spring Act. | Other (Mineral spring meeting the Hot Springs Act standard) |
| Kozoji Onsen Gyokusuiro | Unknown |
| Tenzan Tojikyo A day-use hot spring facility in a traditional farmhouse style near Hakone-Yumoto, known for its open-air rock bath. | Simple Thermal Spring Simple spring |
| Tsunashima Gensen Yukemuri no Sho A complex of natural hot-spring baths and stone saunas, known for its dark-brown water and the carbonated 'Tansan Kohaku-yu' (carbonated amber bath). | Bicarbonate Spring Sodium – bicarbonate cold mineral spring |
| Miyamaedaira Gensen Yukemuri no Sho A complex of natural hot-spring baths and stone saunas, known for its dark-brown water. | Bicarbonate Spring Sodium – bicarbonate spring |
| Onsen Town | Summary |
|---|---|
| Hakone Onsen Geopark | The Hakone Geopark, made up of two cities and three towns (Odawara, Hakone, Manazuru, Yugawara, and Minami-Ashigara), was certified a Japan Geopark in 2012. Hakone Onsen-go, which draws on the gifts of Mt. Hakone's roughly 400,000 years of volcanic activity, has thrived as a hot-spring resort since ancient times. Details |