None of these facts explains much about the park at all. Yoyogi park is something of an enigma. It's the most vibrant park in Japan.
If you go to Yoyogi park on any given Sunday — you'll run into well-off local residents walking their dogs and playing with their kids. You may also run into belly dancers practicing or actors rehearsing a scene. You may also run into random intoxicated people, massive parties, lovers wasting the day away, tourists with huge cameras, a decora fashion happening, a hip hop concert or members of the Tokyo Rockabilly Club swinging to the hits of the 1950s.
It's really a dynamic, interesting place.