1) Japan is more handheld orientated than ever before.
2) The console audience for Wii in Japan is very casual, these kind of gamers done queue out waiting to buy a game as soon as its launched. I have no doubt that Mario Galaxy will hit great lifetime sales as people will pick it up eventually.
That is pretty much it. Obviously i would have liked to have seen higher first week sales buti anticipate it to be the highest selling (or one of) game on the Wii. If it sells like this in Europe or America though, i would be concerned.
Games i'm currently playing: