No, YoY numbers in Japan are excellent since NSMB release. Japan is keeping the numbers up while others and shortages in the US are keeping things down.
Wii was down or flat until NSMB in Japan. After NSMB Wii it's strongly up.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.