The new Mario Kart game for the is continuing to dominate the sales charts in Japan.  The version for the Wii has been at the top for four consecutive weeks, now.  This week alone it tallied up 173,387 sales.  Mario Kart has already sold over a million copies, and is sure to get past two million soon enough.  The only game remotely close to it in weekly sales is Monster Hunter Portable, which has already eclipsed the two million mark, but has been out longer than Mario Kart has.