Fujino Art Walk
Fujino station, which is a bit far west from Tokyo, is a very cool starting point to some walking courses lined with modern art from local artists. Fujino has actually been considered an "artist town" since the end of WWII, and although is somewhat struggling in the modern day, the public art remains to be enjoyed by tourists both international and domestic.
Fujino can be reached on the Kofu line from Takao station, but the train leaves about twice an hour, so it helps to check the train times beforehand.
One of the most notable pieces of art, which in fact can be seen from road while driving through (which has contributed greatly to its notoriety), is the iconic envelope sculpture sealed with a heart mark.