It's common knowledge that spending a little time surrounded by trees and plants can enhance your energy levels. If roaming around town has worn you out, Azumayama Park is a perfect spot to rest and recharge your batteries.
You'll have no end of sightseeing choices when spending time in Ninomiya. Azumayama Park is a great place to start here, but there are numerous other worthy spots to explore. Oiso Long Beach, Odawara Arena, and Oiso Beach are close to the recreation and green space and will top off your day nicely.