Best Carbon Dioxide Spring Hot Springs Ranking
9 hot springs
Carbon dioxide springs contain a high concentration of dissolved carbonic acid gas, causing tiny bubbles to cling to the skin when bathing. This type is relatively rare in Japan but has long been used in Europe as 'the heart bath.'
As carbon dioxide is absorbed through the skin, it dilates blood vessels and promotes circulation, providing warming benefits even in lukewarm water without straining the heart.
Ranking Criteria
Natural Carbonated Hot Spring Nomon-yu
含鉄・二酸化炭素－カルシウム－炭酸水素塩泉
Minabe Onsen Tsurunoyu
含二酸化炭素－ナトリウム－炭酸水素塩泉
Togayama Onsen Tennyo no Yu
含二酸化炭素－カルシウム（・マグネシウム）－炭酸水素塩泉
Kogane Onsen Caldera Onsenkan
Sodium - Chloride - Bicarbonate Spring / 単純二酸化炭素泉
Gandatekyo Himeshaga-no-yu
含二酸化炭素－ナトリウム－炭酸水素塩泉 / 含二酸化炭素－ナトリウム－塩化物泉
Yuya Onsen Okudaya
含二酸化炭素－ナトリウム－炭酸水素塩泉 / 含二酸化炭素－ナトリウム－塩化物泉
Yuzanso Asankotonami
単純二酸化炭素泉
Hakusui Kosen Kurodakeso
含二酸化炭素－カルシウム（・マグネシウム）－炭酸水素塩泉
Yuya Onsen Sengakukan
単純二酸化炭素泉
Comparison of Ranked Hot Springs
| Name | Prefecture | Water Quality | Source-fed | Onsen Value |
|---|---|---|---|---|
| Natural Carbonated Hot Spring Nomon-yu | Nagasaki | 含鉄・二酸化炭素－カルシウム－炭酸水素塩泉 | Natural Source Flow | 3 |
| Minabe Onsen Tsurunoyu | Wakayama | 含二酸化炭素－ナトリウム－炭酸水素塩泉 | Natural Source Flow | 3 |
| Togayama Onsen Tennyo no Yu | Hyogo | 含二酸化炭素－カルシウム（・マグネシウム）－炭酸水素塩泉 | Circulation System | 1 |
| Kogane Onsen Caldera Onsenkan | Yamagata | Sodium - Chloride - Bicarbonate Spring, 単純二酸化炭素泉 | Natural Source Flow | - |
| Gandatekyo Himeshaga-no-yu | Gifu | 含二酸化炭素－ナトリウム－炭酸水素塩泉, 含二酸化炭素－ナトリウム－塩化物泉 | Natural Source Flow | - |
| Yuya Onsen Okudaya | Gifu | 含二酸化炭素－ナトリウム－炭酸水素塩泉, 含二酸化炭素－ナトリウム－塩化物泉 | Natural Source Flow | - |
| Yuzanso Asankotonami | Kagawa | 単純二酸化炭素泉 | - | - |
| Hakusui Kosen Kurodakeso | Oita | 含二酸化炭素－カルシウム（・マグネシウム）－炭酸水素塩泉 | Natural Source Flow | - |
| Yuya Onsen Sengakukan | Gifu | 単純二酸化炭素泉 | Natural Source Flow | - |
Frequently Asked Questions
Q.Why do tiny bubbles cling to my skin in a carbon dioxide spring?
A.Carbonic acid gas dissolved in the water vaporizes from body heat and clings to the skin's surface as tiny bubbles.
Q.Why is the carbon dioxide spring called 'the heart bath'?
A.The gas dilates blood vessels and promotes circulation, providing a warming effect even at lower water temperatures, putting less strain on the heart.
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