Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Matsuyama (63% of total searches to Ehime Prefecture). The next most popular destinations are Imabari (25%) and Shikokuchuo (13%).
KAYAK users have found double rooms in Ehime Prefecture for as cheap as $38 (Shikokuchuo) in the last 3 days. The average price is $244.