I have completed the bathroom for the ryokan. This is a very primitive bathroom, and Peggy has given a very good explanation of these toilets on her blog, so I'll let you go over there to read it, as well as see the little poster she has glued to the bathroom door showing how to use it.
This is looking down from where the ceiling is going to be. You can see that nothing is really lined up right now, because neither the hallway, nor the bathroom are glued in place. I didn't get very fancy with the sink bowl, because you will barely be able to see it once the ceiling is on. That funny looking thing on the left is the toilet.