Minami Tamagawa Onsen Yujuku Hanaya no Mori

A mountain inn in Tamagawa, Semboku, that draws on its own spring. The water shows an orange, mikan-like color, and the inn says it can be drunk. There is an indoor bath and a large rock rotenburo (露天風呂) that is used from mid-May to mid-October; the rest of the year bathers use a small covered rotenburo. Some rooms have their own open-air bath fed by the spring, but the inn's notice says everything except day-use bathing is currently suspended, so overnight stays are not offered for now. Baths are separated by gender. Winter road closures and irregular operation are reported, so it is worth calling ahead.