Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Nagasaki (71% of total searches to Nagasaki Prefecture). The next most popular destinations are Sasebo (19%) and Unzen (9%). Searches for hotels in Shimabara (1%) are also popular.
KAYAK users have found double rooms in Nagasaki Prefecture for as cheap as S$ 84 (Shimabara) in the last 3 days. The average price is S$ 401.