Tenryūkyō Onsen
Tenryūkyō Onsen is a hot spring town in Nagano, Japan. The water leaves the ground at 28.8°C, cool enough that the baths here are usually reheated. It measures pH 9.81 — strongly alkaline. Officially the water is classed as radioactive spring. Its sources put out around 450 litres a minute. 6 inns take visitors here.
The water here
Radioactive spring
Contains trace radon that leaves the water quickly. Also called radium or radon springs.
The numbers
- Water temperature
- 28.8°C
- pH
- 9.81 (strongly alkaline)
- Discharge
- 450 litres a minute
- Inns
- 6
- Address in Japanese
- 長野県飯田市
Figures from the town's Japanese Wikipedia article.
Where it is
35.4422, 137.8186 — open the map
Read more
Other towns in Nagano
Bessho OnsenNagano · 別所温泉Hirugami OnsenNagano · 昼神温泉Togura-Kamiyamada OnsenNagano · 戸倉上山田温泉Shirahone OnsenNagano · 白骨温泉Kakeyu OnsenNagano · 鹿教湯温泉Yudanaka-Shibu OnsenNagano · 湯田中渋温泉郷Nakabusa OnsenNagano · 中房温泉Asama OnsenNagano · 浅間温泉
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.