Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Kōriyama (50% of total searches to Fukushima Prefecture). The next most popular destination is Aizuwakamatsu (50%).
KAYAK users have found double rooms in Fukushima Prefecture for as cheap as €25 (Kōriyama) in the last 3 days. The average price is €81.