Smallish sento. The central main bath is in a figure-eight shape with a shallow bubble and a deep side. The former was outstanding. An electric bath, some weak jets, and another bubble are on the back wall. The latter offering was quite nice. The large dry sauna looked popular, but I did not try it. In an alcove coming off the rear comer of the main bath area is a fabulous cold-water bath that was extremely clean and not too chlorinated. Katsuyama-yu is the only sento in this Muko city in a nice neighborhood near the big local shrine. There is some interesting use of white marble stone in the baths. Friendly owners and regulars. Worth checking out during a walk around the town here.