http://wii.ign.com/articles/878/878096p1.html
Media Create numbers shows that Wii Sports has crossed 3 million sold in Japan. Remember that it isn't bundled there like the rest of the world. They also note the Wii is over 6 million units sold making Wii Sports owned by ~50% of the install base in Japan.
Of course VGC numbers reflect this instance perfectly with 6.12 million Wii's and 3.05 million Wii Sports in Japan.
Even though it's just oen terrirtory, I don't think there has ever been a piece of software sell at a 2:1 rate with the hardware or at least for this long post launch.
Nintendo's surpsingly deep tech/game demo has shown that even without the pack in status, it is truly THE software giant.
The rEVOLution is not being televised
