Honestly SE should push this franchise a lot more in Europe it does better there than even in NA and the games have only been releasing here since VIII.

Between poor releaseschedule and limited advertising for the game it was a tough selljob from the start. Seems to be a great game held back by those things and I hope the NSW release will at least do decently enough for the game to come to the west because as it stands right now I am not so sure.

Poor advertisement and all in all not nearly as interesting and good as VIII was. I feel like they use all the right mechanics in a very bland and boring way. And the game is too easy. Way too easy.

I think I am halfway in, so my opinion might be adjusted a little but so far that's it.

And the music that plays when you´re out on the field, damn that´s one of the worst, most annoying musics I´ve ever heard in a JRPG, or any other game...had to mute after a while..and also almost every town and palace shares the same music, too repetitive.

This is my first DQ game and to be honest, i really like it but i don't love it. Having a silent protagonist is really really bad in this kind of games, plus his haircut is so stupid.

How much did Persona 5 sell worldwide? Around 2.5 million?

How many of those are western sales?
It’s safe to assume DQXI sold around 1 million in the west, those aren’t bad numbers at all compared to everything that isn’t Final Fantasy.

I think that's an extremely narrow viewpoint of the growth of Final Fantasy as a franchise.  The first Final Fantasy released late in the NES' life (1990) and sold less than a million copies.  Final Fantasy II (in the West) released within months of the SNES launch in the West and more than doubled the sales of its predecessor (1.77m).  This was followed three years later by Final Fantasy III (in the West) which went on to again nearly double the sales of the previous installment (3.42m).  Final Fantasy III was huge went it came out.  People were talking about it where I lived, and at the out-of-state college I was going to at the time.  Final Fantasy VII (the 4th Final Fantasy to release in the West not counting stuff like Mystic Quest) did get a huge advertising push and a lot of hype for the 5th gen graphics as was typical for major franchises making that jump (Zelda, Mario, etc).  Yes, it almost tripled the sales of Final Fantasy III, but you are comparing console user bases of SNES (49m) to PlayStation (102m), PS2 (157m), PS3 (86m), and PS4 (91m).  So, it's not surprising that installments on those systems received a bigger jump over their 4th gen predecessors.   My point is that Final Fantasy was already exploding in popularity before Final Fantasy VII.  People weren't just hyped over Final Fantasy VII's cutscenes.  They were hyped over the next Final Fantasy game that they had been waiting for since Final Fantasy III.  Truth be told, getting the next installment of Final Fantasy was one of the driving motivations behind my getting my younger brother a PlayStation for his birthday with the money I was making from my first job. 

i purchased the us version for the ps2 that time and loved it really much how great it was made, and understand why it is one of biggest game in japan, in the last years i played some of the older ones (4 - 6) on the smartphone

Bad marketing. Simple as that.

It's not really true for the US, either.  FF6 (3) wasn't that big a deal here and Square didn't see it as a great success.  It was nothing like FF7, where you had millions of people who'd never heard of Final Fantasy rushing out to buy a PS1 for it.  Square actually made changes to the Final Fantasy formula for FF7 because they wanted the series to sell better in the west.  You can't just say, " well, you doubled 1.5 million with the second game so of course the next game will sell 10 million," either.  It doesn't work that way.

I also believe marketability to non-JRPG fans is one of the reasons why FF9 represents a dip in sales for the series.