Photo: Koda6029 · CC BY-SA 4.0 · Wikimedia Commons
両神温泉 is a hot spring town in Saitama, Japan. The water leaves the ground at 24°C, cool enough that the baths here are usually reheated. It measures pH 9.1 — strongly alkaline. Officially the water is classed as simple spring. 1 inns take visitors here.
Mild and low in dissolved minerals. Usually clear and gentle on the skin, which is why these baths are often recommended for first-timers.
Figures from the town's Japanese Wikipedia article.
36.0078, 138.9750 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.