
Photo: Lyena · Public domain · Wikimedia Commons
Fukenoyu Onsen is a hot spring town in Akita, Japan. Officially the water is classed as acidic spring. 1 inns take visitors here.
Strongly acidic, sometimes below pH 2. It stings on cuts and is not for long soaks.
Figures from the town's Japanese Wikipedia article.
39.9777, 140.8183 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.