Hotel Higashi Taisetsu-sou !
It seemed that the hotel was refurbished so much. The flooring was so nice compared to the former moldy carpet and the IT connection was perfect.
I think 6 to 8 people can stay in this type of room in maximum.
If you stay for seven nights or more, it costs 4,300 Japanese yen/night/person. Of course, three meals for a day.
It is called "Toji-Plan" that means Cure by soaking in the hot spring bath. I am eager to try the one week stay with my wife but she will be fed up with the silence and bathing. I think we need tons of books to spent such long time even in the comfortable hotel.
It is called "Ezo Risu" in Japanese.
But the mascot character of the hotel is Martes zibellina that can be seen around this hotel. The hotel posted nice photos of the animal at brachyurahttp://www.netbeet.ne.jp/~taisetsu/sizen/sizen.html
The facilities of the hotel can be seen at http://www.netbeet.ne.jp/~taisetsu/sisetsu/sisetsu.html