I noticed that many of the translations of the titles for this series are off. All of the PC Engine/Turbografx-16 listings spell it as "Tengei Makyu", when it should be "Tengai Makyo" ("Tengai Makyou" could also be acceptable, which is what the Saturn title is listed under, but the English romanization in Manji Maru's manual is "Makyo"). For the PC-FX rumor mill title, the first half is okay, but it also uses the incorrect "Makyu".
And finally, there's the whole issue of consistency. It's pretty much impossible to do a search and come up with the entire series because some are listed with the Japanese title while others are listed under "Far East of Eden". Neither is really wrong, but from what I've seen (and seeing as these are Japanese exclusive games) "Tengai Makyo" seems to be the "official" title, while "Far East of Eden" is more of a translation (and the title of the book the series was originally based upon). My recommendation would be to have all titles listed as "Tengai Makyo" with an "AKA Far East of Eden".