Today we can confirm that the game is in fact slated to launch outside of Japan for Winter 2013. We made an assumption that the game would be making it to the West based upon the history of Mario Kart Arcade GP1 and GP2 having a release here.
The game was subsequently tested and released in Japan this past Summer. Months ago Namco announced that they would be bringing Mario Kart back to the arcades for a 3rd round with Mario Kart Arcade GP DX.
