Supersento attached to a golf driving range way out on the Osaka-Wakayama border. Very popular with the local people. All soft-water baths. Outside is a large rock lined bath that has many curves and gulfs to explore, including a very shallow portion. There is also a warm, carbonated bath that I really enjoyed. The main indoor bath has a shallow trough of cold water to soak your hands in while your body is in the standard 41 degree bath, something I have yet to see anywhere else.