Well besides the point that MS is in no place to talk about Sony's Japan strategy crumbling, the Sony strategy is simple: games.
The following games are going to be sales drivers for the PS3 in Japan to different extents:
Hot Shots Golf 5
Metal Gear Solid 4
Final Fantasy XIII
White Knight Story
Gran Turismo 5
I'm sure there are others too, but these are the biggest I think.
So before we call the Sony strategy in Japan is crumbling, let's see how FF XIII and these other games do.
Thanks to Blacksaber for the sig!