Izu Nagaoka Onsen
- Location
- Izu Nagaoka, Shizuoka, Japan
- Water type
- sodium chloride
- Temperature
- 43 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Izu Nagaoka Onsen is located in Izu City, on the Izu Peninsula of Shizuoka Prefecture — a volcanic finger of land extending into the Pacific south of Tokyo, whose combination of rugged volcanic coastline, deep mountain valleys, mikan orange groves, and numerous hot springs has made it one of the most popular resort destinations for Tokyo's 35 million metropolitan inhabitants seeking a weekend escape into nature, warmth, and therapeutic bathing. The chloride-rich and calcic hot spring waters of Nagaoka are drawn from the geothermal resources associated with the Izu volcanic arc, a chain of submarine and terrestrial volcanoes stretching from Tokyo Bay toward the Mariana Islands, and are valued for their warming and skin-beautifying properties. Izu Nagaoka's central position on the peninsula, flanked by Shuzenji — one of Japan's most celebrated valley onsen towns — and the Amagi mountain watershed, makes it an ideal base for exploring the full diversity of the Izu Peninsula's exceptional hot spring culture, volcanic scenery, and coastal fishing village landscapes.