We are very excited about this ryokan. We just popped in for a day onsen. We'll be back to stay the night some time pretty soon. This is a beautiful area in winter.
They have some little private onsen rooms. We booked one for 2500 yen for 40 minutes. We already knew the water was very good in this area (some of the best in Nasushiobara area). They have 3 private rooms that all look to be different in style. There are also larger baths that we did not visit for (I think) 800 yen a visit (separate men's and women's).
The guy at the front desk spoke pretty good English.
The winter rate for a ryokan stay is a bit over 10,000 yen per person for 2. It includes a Hunter Mountain ski pass.