This one is just off the highway but far away from the center of Himeji city proper. A, seemingly, city run operation with more than a few quirks to it. But first the baths. The natural spring here is noticeable however it is a cold well that is heated up and does not have the same reporting responsibilities as a typical hot spring. (Note: the website calls it “ナトリウム炭酸水素塩泉” which I translate to a bicarbonate spring on this site.) You should not take this as a negative, however as the spring felt great in the shallow main bath. Outdoors the water is carbonated making it a bit cooler than the main indoor baths. That combined with the TV it makes it easy to soak there for a long time. One of the best baths I have been to. So now the quirks… there are some strangely situated and weak jets in the main shallow bath which are turned on by the most glorious industrial button that demands to be pressed. If it is not busy and the bath is still when you are there you can enjoy watching the bubbles from the jets spread into the main bath which makes bathing here a physics experiment. There is also oddly grandiose kakari basin with the half-broken jet shower behind it. Then they have a selection of different body soap, shampoo, and conditioner to use. My daughter very much enjoyed that, some of the showerheads have LED lights that activate when water flows through the handle spinning a small dynamo.
I saw a guy with full tattoos here so it should be OK.
You cannot miss all the aquariums with turtles and fish in the lobby.