Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Sayama (33% of total searches to Saitama Prefecture). The next most popular destinations are Saitama (25%) and Kawaguchi (25%). Searches for hotels in Kumagaya (17%) are also popular.
KAYAK users have found double rooms in Saitama Prefecture for as cheap as $69 (Saitama) in the last 3 days. The average price is $146.