Come on people, be a little more corporate sensitive.
It is a global market, yes? So, the math is simple - if we publish EUR, AUS and US version close to Japanese release, noone will order a Japanese version in enourmous amounts, with nice side-feature of making GT4 the best selling game of all times in first day of relese.
Do not forget that Microsoft today released a pretty nice info about pre-order quantities of Halo 2, stating that Halo 2 has reach a all-time-record with 1,5 million pre-orders. So, we have to make this simple: we release a Japanese first, then we make a gap of about 3 months, aned everybody around the globe will order a Japanese version. And kick the Mcrsft's butt.
And yes, all those people will also buy their (AUS, EUR or US) version when it comes out, so count them double.
Be serious - if the game is coming for other territories in February, will you order your Japanese copy? Say "no", come on, let me see you. Of course everybody will order it. I will order it. I know 4 people who will order it.
Money, money, money, must be funny, in the Sony's world....