Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Mito (44% of total searches to Ibaraki Prefecture). The next most popular destinations are Tsukuba (39%) and Hitachinaka (10%). Searches for hotels in Tsuchiura (7%) are also popular.
KAYAK users have found double rooms in Ibaraki Prefecture for as cheap as $29 (Tsukuba) in the last 3 days. The average price is $110.