In USA the Wii has sold about 40M software. 9M of that is Wii sports. It would have sold 2M anyway, so let's subtract 7M and get 33M.
33/9.1=3.6
Japan: 16/5=3.2
So Japan buys 1/9 less Wii games than USA! OMG!
Standing on bare feet, only lookng at million sellers and adding a bit, I'd say 27.5M software sold in Europe. Subtract 7M Wi sports and get 20/6=3.33
Japan is about 1/12 less buying than Europe.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS