I really didn't know what to expect with this place. It was booked through a tour company, so we just decided to trust them. The website is completely in Japanese, and friends who had tried to book it from the US were unsuccessful. No internet connection was available at all.
It was our first time staying at a ryokan and overall, we found the experience to be pleasant. Guests remove shoes immediately after entering the foyer. The shoe lockers take 100 yen coins which are later returned to you. The staff were very polite, and had a good command of English. They will hold your bags for you if you arrive too early for check-in. The room was large for Japan standards, enough to fit 2 futons, a low table, with room to spare. The bathroom was small, but had a sink, mirror, toilet, and even a tiny shower so you don't have to wash in the public bath if you didn't want to. No toiletries though, so if you did want to wash in your room, you'd have to bring your own shampoo and soap. Towels also not in the room; you normally would get a towel and yukata at the front desk, but our rate included them, so the staff had them prepared when we checked in.
There is a curfew of 12am, which worked out just fine, since everything in town seems to shutdown after 5pm. That fact also made it difficult in terms of dinner options since the onsen did not serve food. We ended up getting some snacks at the nearby 7-11.
The onsen was split male/female. The female onsen had 15 wash stations, an indoor soak pool, 2 outdoor soak pools, and some smaller (maybe individual soak pools?). There are also private baths available for an additional cost, but I ended up being the only one in the onsen anyway, so I had the giant bath all to myself.
Improvements that could be made to better accommodate foreign visitors:
1. Everything in the room was self-service, meaning we had to set up our own futons. We think we did it correctly, but really weren't too sure. It would have been helpful to have instructions on how to set up the futons.
2. Clearer instructions on how to partake in the onsen experience. There were posters that went through the main steps of washing before soaking, and not putting towels into the bath water, but further instruction on simple things like, how you use the small towel for washing, and where to put the small towel after finishing and before going into the pool (on top of head? on your wash stool? in your locker?) These may seem like silly questions, but it's not obvious for those who have never experienced a public bath (i.e. Americans)