No. You are travelling too much in such a short time frame. Forget tokyo, you will just wish you were still riding.
Imo you should do Niseko, Rusutsu and sapporo teine if you really want to spend a day in Sapporo city blowing out.
If Tokyo is a must then forget Hokkaido and hit up Hakuba, Nozawa and myoko with a day or 2 in tokyo to finish up. If you go with this plan you might be able to hook up with dreampow and myself for a few turns ;-)
Travelling in japan sucks so keep it to a minimum.