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Inagoyu Onsen

Nagano · 稲子湯温泉

Inagoyu Onsen is a hot spring town in Nagano, Japan. The water leaves the ground at 7.6°C, cool enough that the baths here are usually reheated. It measures pH 4.9 — mildly acidic. Officially the water is classed as carbon dioxide spring and sulfur spring. Its sources put out around 44 litres a minute. 1 inns take visitors here with room for about 80 guests.

Getting there

From Tokyoabout 3 h
CarNot needed
JR PassCovers the train
  1. Train to Matsubarako Station (JR)
  2. Local bus

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

Carbon dioxide springSulfur spring

The water here

Carbon dioxide spring 二酸化炭素泉

Fine bubbles cling to your skin. Rare in Japan, and usually cooler than other springs.

Sulfur spring 硫黄泉

The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.

Things to see nearby

Mount NyūMountain · 2.7 km
Tatsuoka CastleCastle · 19.2 km
Koumi-machi Kōgen Museum of ArtArt museum · 4 km
Shirakabako Royal HillSki area · 16.2 km
Doryu FallsWaterfall · 14.5 km
Kurumayama-Kogen SKYPARK Ski ResortSki area · 18.4 km

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.

Rooms with an open-air bath — NaganoInns with a private bath — Nagano

More on tattoos and onsen

Where to stay

Onsen inns — Koumi Town

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

Matsubarako OnsenNagano · 松原湖温泉4 km northeast
Bicarbonate spring
Honzawa OnsenNagano · 本沢温泉4.3 km southwest
Sulfate springSulfur spring
Shibu Goten-yu OnsenNagano · 渋御殿湯温泉6.4 km west
Acidic springSulfur spring
Sakuuminokuchi Hot spaNagano · 佐久海ノ口温泉8.4 km east
Chloride springBicarbonate spring
Yokoya OnsenNagano · 横谷温泉11.2 km west
Carbon dioxide springIron spring
Ikenotaira OnsenNagano · 池の平温泉15.9 km northwest
Simple spring

Similar water elsewhere

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

Akagawa OnsenOita · 赤川温泉Also carbon dioxide and sulfur, similar pH
Sulfate spring+2
Kyōwa OnsenHokkaido · 協和温泉Also carbon dioxide, similar pH
Carbon dioxide spring
Amihari OnsenIwate · 網張温泉Also sulfur, similar pH
Sulfur spring
Mikurigaike OnsenToyama · みくりが池温泉Also sulfur, similar pH
Acidic springSulfur spring
Iwakura OnsenTokyo · 岩蔵温泉Also sulfur
Sulfur spring
Tsurugatonneru OnsenFukui · 敦賀トンネル温泉Also sulfur
Sulfur spring

The numbers

Water temperature
7.6°C
pH
4.9 (mildly acidic)
Discharge
44 litres a minute
Inns
1
Guest capacity
80
Address in Japanese
長野県南佐久郡小海町稲子1343

Figures from the town's Japanese Wikipedia article.

Where it is

36.0439, 138.4000 — open the map

Read more

Japanese Wikipedia

Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.