Very demanding, aren’t we? They have never, to my knowledge, ever confirmed that a game is definitely not coming over, with a handful of exceptions, all related to games they announced, then had to un-announce as problems cropped up in the localization process.
If they even see your post in this thread (questionable, since both Shingo and Lamuness seem to be almost entirely absent nowadays, and Peter never checks the boards) they will probably still not answer your question. After all, who can say? The game might be backported to PC, in which case they could probably get it out. They might be able to get it on XBLA if the rest of the games prove exceptionally popular. Who knows? Nobody knows the future, and saying “No matter what, we are never ever releasing $GAME” can really only hurt the company.
But if I were taking bets, I’d put 100:1 odds (at best) that this game would be released in the next 5 years. If you are interested in the vast bulk of Japanese software out there that is not now, nor likely ever to be, translated, then you have two options. One, wait for machine translation to not suck (which will take at least another decade, probably). Two, learn Japanese.
Just go learn Japanese. This particular game is virtually guaranteed to not be the only one you would like to play.