No, it's not a Grand Theft Auto car. You live all the way in Japan and can't quite afford to import the most likely crushed, '88 Pontiac Banshee concept car? No worries mon' Just import a 4th gen Camaro and have the little Japanese gnomes assemble one for you!
That's right, surfing around the Yahoo auctions found me some prime junk! Who imports a whole Firebird just to hack it into a look-a-like! Crazy! The original ad can be found here.
Oh, and here's a GTA4 banshee for no raisen.