I have lost hope for this game now. The concentration of players for this game is clearly in the US and Europe, none of which I would be able to play with from Asia. The fact that the game is region locked is understandable since they use P2P connections for online play. However, I have a feeling that the regions in Asia don't have nearly as many supporters, and this game is going to fail miserably from a lack of players in my region. People in Japanese forums are already saying they won't buy this game because the online play will be domestically restricted.
Region lock doesn't prevent you from playing online against others from out of your region...
it just means you can't grab a US copy and play it in a Japanese XBox.
Almost all XBox games are Region coded, almost no PS3 games are. Mainly because the original release PS3s weren't given region coding (which means my 60GB console can play region coded games I shouldn't normally be able to run)