The hotel levels seem to be:
Disney Hotels--run by Disney and adjacent to the parks.
Official Hotels--in that hotel alley behind the parks. Have bus service from the Bayside monorail station
Partner Hotels--near Disney, offer shuttle-bus service to the parks
Good Neighbor Hotels--Somewhere in Tokyo. Offer limited shuttle service you need to make a reservation for.
Personally, I think that, as long as you're near a major train station, you can stay anywhere in Tokyo and still be reasonably convenient to the parks. I've gotten from Shinagawa to Disney by train in less time it takes me to get across WDW by bus.