It's really clean.
Like, lick-the-ground clean. OK, maybe not that clean, but seriously. When we were sitting on the sidewalk waiting for the electric light parade to start, someone was coming by every few minutes to take people's trash and pick up the parade route. Japan in general is quite tidy, so it's no surprise that Tokyo Disney is the cleanest theme park I've ever been to. Plus, even the soap comes out of the dispenser in a Mickey Mouse shape!