We stopped over for a night at this hotel on our way between Tokyo and Osaka and were very impressed by what we got for our money. The hotel was clean and well appointed, the staff were friendly and helpful, and the rooms were spacious. We did not use the onsen facilities so I cannot comment on that.
Our favorite part of this hotel was that it had coin laundry machines, which seems silly, but they're actually hard to find in Japan and the laundry service offered by most hotels is very expensive.
This hotel had free wifi and ample parking, and a great breakfast buffet ($10 per person).
If I were visiting the nearby amusement park or passing through I would definitely consider this hotel again.More