Three Ancient Springs

The Three Ancient Springs (日本三古湯, Nihon San Kotō) are a group of ancient onsen in Japan.

According to the Nihon Shoki and Fudoki, both from the eighth century, they are:


 * Dōgo Onsen, Ehime Prefecture
 * Arima Onsen, Hyōgo Prefecture
 * Nanki-Shirahama Onsen, Wakayama Prefecture

The tenth century Engishiki gives a slightly different list:


 * Dōgo Onsen, Ehime Prefecture
 * Arima Onsen, Hyōgo Prefecture
 * Iwaki Yumoto Onsen, Fukushima Prefecture