Tatsuno Onsen Nagano
- Location
- Tatsuno, Kami-ina, Nagano, Japan
- Water type
- sodium chloride
- Temperature
- 41 °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.
Tatsuno Onsen is a traditional hot spring in the historic town of Tatsuno in Nagano Prefecture, located in the Tenryu River valley where the river begins its long descent from the Suwa Basin toward the Pacific Ocean at Hamamatsu in Shizuoka. The chloride-rich mineral waters provide effective body warming and ease muscular fatigue, offering relaxation in a town whose history as a Meiji-era silk road post town is preserved in the charming Tatsuno-juku streetscape of wooden merchant houses alongside the Tenryu River. The clear mountain air, riverside scenery, and the onsen's authentic local character make Tatsuno a rewarding stop for travelers following the historic Ina Road through the Tenryu River valley.