Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Tokyo (91% of total searches to Koshinetsu). The next most popular destinations are Hakuba (5%) and Fujikawaguchiko (4%). Searches for hotels in Nozawa Onsen (1%) are also popular.
KAYAK users have found double rooms in Koshinetsu for as cheap as $25 (Tokyo) in the last 3 days. The average price is $279.
In the last 72 hours, users have found Koshinetsu hotels for tonight for as low as $48 (Tokyo). Users have also found 3-star hotels from $56 (Fujikawaguchiko) and 4-star+ hotels from $107 (Tokyo).