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Tenryūkyō Onsen

Nagano · 天竜峡温泉

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.

Getting there

From Tokyoabout 2 h

From Kyoto / Osakaabout 2 h

CarNot needed

JR PassCovers the train

1. Train to Tenryūkyō Station (JR)
2. A short walk

Fly into Haneda or Narita. Times are rough estimates worked out from station locations, not a timetable — check the exact route on Google Maps.

The water here

Radioactive spring 放射能泉

Contains trace radon that leaves the water quickly. Also called radium or radon springs.

Things to see nearby

Places from Wikidata, photographs from Wikimedia Commons. Distances are in a straight line from the town.

With tattoos

Many public baths still turn away visible tattoos, and the rule is set by each bath, not by the town. The reliable way round it is to bathe privately: a room with its own open-air bath, or an inn with a private bath you can book for yourselves.

More on tattoos and onsen

Where to stay

Opens Rakuten Travel, which lists inns in English. Onsen Guide earns a commission if you book through these links, at no extra cost to you.

Hot spring towns nearby

Similar water elsewhere

Towns further away with the same kind of water — useful if this one is hard to reach or fully booked.

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

Japanese Wikipedia