Ive always misplaced blame and anger on microsoft towards the annoyance that is region locking. However as it turns out, MS always had given the developers a choice of the matter as you can see in this article
http://kotaku.com/5368190/bullet-hell-shooter-creators-cave-going-region+free-for-next-xbox-360-gameThis is a chance, if people could convince G Rev to make their home console port for senko no ronde DUO region free, I would be much obliged to buy/import it. Since most likely, ubisoft would not attempt to port the IP anymore with the abyssmal sales they got. (Which is partly their fault with the lame title and cover art)