Along with the glittering "neon canyons" of Shibuya or Shinjuku, Tokyo has many areas that are exceptionally tranquil and actually quiet. Even up to what you'd think was a remote, streamside trail along a narrow canyon but which is actually near the middle of teh greater Tokyo metro area (Todoroki Ravine...see pic below).

Lots in between, too, like the funky thrift-store vibe of Shimokitazawa, posh shopping areas like Nishi-Azabu/Roppongi or Omotesando, chill coffee house vibes in Koenji (or a bit more "metal" in Kichijoji!). I travel a lot, but I've never encounbtered a city that does as much different things as Tokyo, and does them so very well.