En shoryuken.com han dado una contestacion oficial desde Aksys:
Alright folks, I know everyone here that's outside of the US has been waiting for a reply on this region lock situations. So here's the lowdown, we recently found out that the US version of the game will be region locked to US and Asia.
This I believe goes for the JPN/Asia versions as well. I’m not 100% sure, so don’t quote me on this.The bottom line is that Aksys Games does not have any rights to BlazBlue outside of the US, and the region coding was in accordance with our contract and was not a conscious decision by us.
Believe me when I say we are trying to do everything in our power for this community. I don't sit here daily and post on SRK and Dustloop just to chat with the community and hype up a game for my health. As some of you know me personally, I love the community and the fighting games we bring to it. So, for me to break all the good mojo and work we’ve put into this community puts a damper on everyone’s mood here at Aksys.
With that said, the PS3 version is region free like all other PS3 titles. But, it is a real alternative for folks that want to play BlazBlue on day one and battle folks online.
Again, we apologize for this and I hope you guys continue to support us going forward.
Por lo que creo que él dice no está del todo seguro de que la version Jap sea region locked no? Quizá hay alguna posibilidad de que sea region free la japonesa. Recemos!!!
La noticia la he sacado de los foros de Gamefaqs.