Went to Shonan Daira Koen yesterday. It is a park on top of the ridge of hills that sweep down to the sea beside Hiratsuka. One of its main features is a big Eiffel Tower style viewing platform overlooking the city and the ocean.
Over the past decade or so, it has become a bit of a thing among teenage couples to attach locks to this tower as testaments to their undying love. Almost every surface is covered with the things.