Spring type (therapeutic classes)
Contains radon above a set threshold; bathers receive a very small dose of radiation. Misasa, Masutomi and Arima are examples. Concentrations vary widely.
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Calistemon · CC BY-SA 4.0
登別温泉
Hokkaido · 100 Onsen to Know Japan — No. 1
Ten thousand tonnes of water a day and nine kinds of spring, all boiling out of a single valley called Hell.
Mti · CC BY-SA 3.0
湯の花温泉
Kyoto · 100 Onsen to Know Japan — No. 70
About an hour from Kyoto Station by train and bus: a quiet valley spa called 'Kyoto's inner parlour', with radon-bearing water where wounded samurai are said to have healed.
663highland · CC BY-SA 4.0
有馬温泉
Hyogo · 100 Onsen to Know Japan — No. 62
Salt and iron thicker than seawater in the 'gold' spring, carbon dioxide and radon in the 'silver': two utterly different waters rise five minutes' walk apart.
三塚 · CC BY-SA 4.0
三朝温泉
Tottori · 100 Onsen to Know Japan — No. 74
Soak it, drink it, breathe it. A spa built around taking radon into the body three ways, with a free riverside bath and free drinking fountains open to the whole town.
増富温泉
Yamanashi · 100 Onsen to Know Japan — No. 44
Thirty quiet minutes in water around 30 °C. A therapeutic village where one of Japan's most radon-rich springs is bathed in unheated, exactly as it comes.
Soren Bradley · CC0
Asako · CC BY-SA 2.0
Suz-b · CC BY-SA 3.0
photo: Qurren (トーク) Taken with Canon IXY 430F (Digital IXUS 245 HS) · CC BY-SA 3.0
Drph17 · CC BY 4.0
Drph17 · CC BY 4.0
Siriusplot · CC BY-SA 3.0
たびひろ · Public domain
photo: Qurren (トーク) Taken with Canon PowerShot G9 X · CC BY-SA 4.0
K.F. · CC BY-SA 3.0
京都東 · CC BY 4.0
ブルーノ・プラス · CC BY 4.0
Asturio Cantabrio · CC BY-SA 4.0
しんかわな · CC BY-SA 3.0
Goki (talk) · CC BY-SA 3.0
0nedream · CC BY-SA 3.0
663highland · CC BY 2.5
日:Jnn · CC BY 2.1 jp
奈佐鸛 · CC BY-SA 4.0
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