Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Nikkō (50% of total searches to Tochigi Prefecture). The next most popular destinations are Utsunomiya (25%) and Oyama (25%).
KAYAK users have found double rooms in Tochigi Prefecture for as cheap as $39 (Nikkō) in the last 3 days. The average price is $300.