Hi KK,
" How would you compare the onsens at Mahoroba hotel and Takimotokan, if you stay at the former would you NOW pay just to visit the onsens at Takimotokan ?"
Unless you want to experience having a bath in Daichi Takimotokan, otherwise I do not see the point. IMO ,the baths in Mahoroba are as good as Daichi Takimotokan's .FYI,
you do not have to be a staying guest to have a bath in Daichi Takimotokan, but you have to in Mahoroba.
"Do you have any hotel or activity suggestions for Furano, Biei, Asahikawa or Sounkyo ? The only items we have looked at are Farm Tomita, the winery and maybe cheese factory and Asahiyama zoo. "
I think William5 covered Furano, Biei, Asahikawa very well. I enjoyed my visit to these areas, especially Biei. One thing I would like to add, driving / hiring a car is a much better option for exploring the area than relying on public transport.
Sounkyo is not a big place,but has a few attractive spots:
http://www.japan-guide.com/e/e6777.htmlI visited the place twice, once spring ,and once winter time. I enjoyed both visits, but the Hyoubaku Matsuri / ice festival in winter time was more special.
I stayed at the Grand hotel,cheaper than many other hotels in the areas. I do not find the hotel anything special, but they provide free shuttles from Asahikawa and other places.
Asahikawa zoo is claimed to be the best in Japan? I visited the place last November ,and frankly , it was a big disappointment .