I wouldn’t recommend this hotel at all! First of all, the price is not cheap for an onsen hotel to rent, given the quality and services you are getting. The furniture in the room is small and old.
You can book a private onsen once per day, but the water wasn’t even hot; it was warm and didn’t feel like an onsen!
Lastly, the old lady (who I believe is the owner) is not friendly and unwelcoming at all! She sounded so arrogant, and the way we were greeted was bad! There was no smile on her face. We came in a group of friends who stayed in another hotel, and she told us that our friends couldn’t use any of the amenities, including the common waiting area or the bathroom at the lobby, which is ridiculous!
Also, be mindful that there is no elevator in this hotel, so if you have quite a few pieces of luggage, avoid this hotel at all costs, or else you’ll have a hard time carrying your luggage.