most of us wouldn't get it.....the Japanese are soo different with some of the things they do, but if you look around a little bit, you'll find that some of the inspiration's on those cars are coming from older japanese cartoons!
You can tell it's all for fun and games, not taken super-seriously, other than the "most outrageous" look part
anyway on to a real question....in some of the pics you will see a large cable coming from under the hood or through a headlight and out to a rectangular box under the front of the car......any speculations as to what it is?
example:
http://tanetane92.web.infoseek.co.jp/052871.jpg
an intercooler mounted outside the car maybe?