Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Hakone (74% of total searches to Kanagawa Prefecture). The next most popular destinations are Kawasaki (21%) and Yokohama (4%). Searches for hotels in Atsugi (1%) are also popular.
KAYAK users have found double rooms in Kanagawa Prefecture for as cheap as €23 (Yokohama) in the last 3 days. The average price is €254.