Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Minamioguni (35% of total searches to Kumamoto Prefecture). The next most popular destinations are Kumamoto (33%) and Aso (25%). Searches for hotels in Hitoyoshi (8%) are also popular.
KAYAK users have found double rooms in Kumamoto Prefecture for as cheap as $55 (Aso) in the last 3 days. The average price is $448.