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 Japanese culture-related lists Bathing in Japan Hot springs of Japan