[Matrix6]

I was aware that it did come out in Japan, though that was back in 2001.

The one listed and not available on every amazon site that was supposed to be sold [this year] was an English version. It's basically the Japanese version but with an English translation and a little less content.

I doubt amazon is at fault here, the publisher probably cancelled it for some reason. So it's probably best to seek out answers from the publisher themselves.

As for the eBay listing, that's the Japanese [2001] version only and not the non-existent 2012 English version.