Are you plan to stay overnight in Amanohashidate or Miyazu area?
If so, you can visit the romantic? sandbar(Amanohashidate) in the night.
http://www.amanohashidate.jp/machiakari/image/suna.png
Date: From 16th July 2016 to 31st August 2016
Time:19:00-22:00(everyday during the period)
Place: Amanohashidate (about 10mins walk from Amanohashidate station)