This is a dynamic list of geothermal hot springs (onsen) as geological phenomena in Japan. This list is not for listing commercial establishments such as spa hotels, onsen ryokan, healing centers or other commercial establishments. Japan has many geothermal spring systems as it is located in the Pacific Ring of Fire volcanic area. More than 27,000 hot spring sources exist in Japan, together they discharge over 2.6 million liters of water every minute. These springs have played, and continue to play, an important role in Japanese culture throughout history. In Shinto, Sukunabikona is the kami of the hot springs. As the deity of hot springs Sukunabikona and Ōkuninushi went to the Dōgo hot springs. There Ōkuninushi put Sukunabikona in the hot spring water to heal him of an ailment. Upon awakening, Sukunabikona danced atop a stone. It is said that his footprints left impressions on the rock, known as Tamanoishi, which still exists at Dogo Onsen north of the main building. Akita Prefecture Akinomiya Hot Springs Nyūtō Onsen Ōfuka Onsen Takanoyu Onsen also known as Falcon's Hot Spring Tamagawa Hot Spring is tied (with Higashi Onsen in Kagoshima) for the highest acid content of all hot springs in Japan, at a PH value of 1.2. Tsurunoyu Onsen Aomori Prefecture Asamushi Onsen Furofushi Onsen Kappa-no-you Hot Spring Oku-yagen Hot Spring Sukayu Onsen Yagen Onsen Ehime Prefecture Dōgo Onsen was mentioned in the oldest collection of Japanese poetry, the Man’yo Wakashu. Fukui Prefecture Awara Onsen, Awara Fukushima Prefecture , Nihonmatsu, Fukushima Iizaka Onsen Iwaki Yumoto Onsen Sabakoyu Onsen Takayu Onsen Tsuchiyu Onsen Gifu Prefecture , Gero, Gifu, Hida River , Takayama Nagaragawa Onsen Gunma Prefecture Akagi, Gunma , Ikaho, a.k.a. Ikaho Onsen, Kogane-no-Yu (The Golden Waters), Kodakara-no-Yu (Child Waters) Kusatsu Onsen Sawatari Hot Springs Rosoku Onsen has the highest radium content in all of Japan., also known as Yunoshima Radium Kosen Hoyojo (Rosoku Onsen) (有限会社 湯之島ラジウム鉱泉保養所) Shima Onsen Takaragawa Onsen Hokkaido Prefecture Hokkaido Prefecture has the third most hot springs with 2,304 registered. The hot springs in the prefecture have the second highest discharge rate of water at 260 kiloliters per minute. Asahidake Onsen Futamata Kamuiwakka Falls Noboribetsu Jigokudani, or Hell Valley, the main source of the Noboribetsu onsen Onnetō Hot Falls Tenninkyo Onsen Tōyako, Hokkaidō, Shikotsu-Toya National Park Yunokawa Onsen Hyōgo Prefecture Arima Onsen, Kobe, was mentioned in the Nihon Shoki, the second oldest account of the history of Japan (after