Kinseikan Seseragi

A slightly more detailed review. An old but very well-maintained ryokan on the banks of the Tanigawa River, right at the foot of Mount Tanigawa. The water is soft and alkaline, 54 degrees at the source. Your skin becomes supple and stress melts away. The main bath is a konyoku (mixed bath) by the river, with no washing area or soap. There are dedicated women-only hours and kashikiri (private) time slots. Additionally, there's a gender-separated rooftop area with a rotenburo and a hinoki (cypress) bath, and a small kazokuburo (family bath) without a rotenburo. There's also a drinking spring. Delicious mineral water! The food is excellent kaiseki. Free coffee and all-you-can-eat ice cream. And the views. The views are incredible. I think the autumn foliage here would be absolutely stunning.