高倉山温泉 is a hot spring town in Iwate, Japan. Officially the water is classed as simple spring and radioactive spring.
Mild and low in dissolved minerals. Usually clear and gentle on the skin, which is why these baths are often recommended for first-timers.
Contains trace radon that leaves the water quickly. Also called radium or radon springs.
Figures from the town's Japanese Wikipedia article.
39.4600, 141.0000 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.