First, the good points: dinner was very good, and nicely presented. The rooms are very large by Japanese standards, if you are OK with sleeping on mats on the floor (and the pillows they provide are microscopic). Has its own hot spring with two different public areas and three private areas (you get one free use of a private area per stay).
However, the hotel is in a rather run-down condition. Parts of it smell strongly like mildew (fortunately not our room or the eating area). Since the weather was cool, we left the windows to our room open at night, as we found them when we entered the room. Big mistake! There were holes in the screens and we were eaten alive by a large flock of mosquitoes. The person manning the front desk at night knows no English except numbers. Only accepts cash for incidental expenses. Breakfast is a standard Japanese hotel breakfast, maybe a little above average.
While set in a nice rural valley, the village of Ashinoyu is dilapidated and contains only the Ryokan, and car-repair shop, a tiny bank, and a rather sorry-looking dollhouse museum.
Bus service to rest of the area works pretty well during the day.
They only promise free wifi in the lobby, but we could pick it up in our room. It worked OK. This was fortunate, because our room here was the only place in Japan the portable wi-fi we rented didn't work.