
Photo: Drph17 · CC BY 4.0 · Wikimedia Commons
出湯温泉 is a hot spring town in Niigata, Japan. The water leaves the ground at 18.1°C, cool enough that the baths here are usually reheated. It measures pH 6.6 — close to neutral. Officially the water is classed as radioactive spring. Its sources put out around 31 litres a minute. 5 inns take visitors here with room for about 143 guests. About 2,546 people a year come to bathe.
Contains trace radon that leaves the water quickly. Also called radium or radon springs.
Figures from the town's Japanese Wikipedia article.
37.8200, 139.3000 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.