Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Sapporo (54% of total searches to Hokkaido Prefecture). The next most popular destinations are Niseko (23%) and Asahikawa (12%). Searches for hotels in Kutchan (12%) are also popular.
KAYAK users have found double rooms in Hokkaido Prefecture for as cheap as €24 (Sapporo) in the last 3 days. The average price is €177.