This is why I was growing concerned for the Wii in Japan, because I didn't expect Galaxy 2 to move any Wiis there, and sure enough, it didn't. The game might move consoles a bit in the West, but not in Japan, where 2D Mario vastly outpaces 3D Mario in terms of popularity.
The remedy for Wii's stagnation in Japan is Wii Party, and on a larger scale, Wii Relax. Those are the types of games that move systems there, games that try new things and draw in new crowds. Nintendo needs to keep releasing more games like Wii Fit in Japan that push the boundaries of the very definition of a game, in addition to more motion plus games that show Nintendo put some work into them.
Of course, there will be some other games, like the Dragon Quest games, Monster Hunters, and established Nintendo franchises like Pikmin, Star Fox, Kirby, etc, that may move a few units there as well. But to TRULY keep the momentum, Nintendo needs to keep creating not only new games, but entirely new GENRES.
Nintendo can only do so much on their own. Without the help of third parties that will be impossible, because they will have to go through long droughts and momentum is then lost and people just moves on to the consoles where the games are, like it happened after 2008.
Proud poster of the 10000th reply at the Official Smash Bros Update Thread.
tag - "I wouldn't trust gamespot, even if it was a live comparison."
Bets with Conegamer:
Pandora's Tower will have an opening week of less than 37k in Japan. (Won!)
Pandora's Tower will sell less than 100k lifetime in Japan.
Stakes: 1 week of avatar control for each one.