Ah ha the 'art' of 'vanning'. I have a few Japanese 'vanning' magazines lying around my flat. Not entirely my cup of tea, but entertaining viewing nonetheless.
You could lay down of the front 'aero' kit of the first pic you posted. I guess that guy wanted an extra bumper, or just a reason to stop 5 feet behind the guy in front of him at the stop light.
Yeah, I've seen those, but I figured they had already made the rounds here. I'm going to submit a proposal to change Japan's motto from "The Land Of The Rising Sun" to "Japan: Anything Worth Doing Is Worth Overdoing!"