Vague spoilers...ish
"Tokyo Psycho" is about...well, not what the title suggests. While it might be suggested that the film is about a city wide manhunt for a deranged killer, it's actually confined to the escapades of a single woman and the nerdy guy from the back of the class who still has a crush on her from school. Still, "Sexually Confused Apartment Block Pervert" doesn't quite have the same ring to it, yet that is what the film concerns itself with.
Shot in an almost documentary style and running at a very modest 78 minutes, "Tokyo Psycho" certainly doesn't outstay its welcome too much, however the short running time doesn't mean it is fast paced. It does get off to a reasonable start, with the central character having an unpleasant encounter with a nut who may or may not be Pete Burns from Dead or Alive...yet this doesn't seem to have anything to do with the rest of the film.
The characters is where the film really slips up. The "killer" really isn't threatening at all, and the central heroine is pretty hard to root for; yet this isn't so much the fault of the actress, but the fault of the writer who gave her nothing to work with. To be fair, the minimal cast does do its best; however with the clichés coming thick and fast (who'd have thought the stalker would have boarded up the windows of his apartment and plastered pictures of his target everywhere?) and a unsatisfying ending that disjoints the film even further (which takes some doing with the paper thin story), "Tokyo Psycho" doesn't leave a good or bad impression; it's just yet another average Japanese "horror" with little in the way of scares or thrills; destined to sink into the abyss of mediocrity.