Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Takamatsu (63% of total searches to Kagawa Prefecture). The next most popular destinations are Shodoshima (13%) and Kanonji (13%). Searches for hotels in Miki (13%) are also popular.
KAYAK users have found double rooms in Kagawa Prefecture for as cheap as $68 (Takamatsu) in the last 3 days. The average price is $263.