MGS 4 outsold by MGS 2 and peace maker on psp should be enough to prove his point.

people thinking kingdom hearts will save the system from dead last gen bs handhelds spin-off are really not looking at the market.

WiiU -4-5 million 

PS4 - 6-7 million.

Vita will have more constant third party than PS4

Oldsold by 40k is hardly "losing appeal".  It'll make that up by the time the numbers have settled considering it sold 96k last year.

And besides, MGS4 sold more FW than either MGS2 or MGS:PW.

So again, I don't really see anything in his statement which is true. 

I hope you´re right, but i don´t really see it happening. It´s been a loooooong time since a console game sold that much in Japan

What WiiU games have to do with this, by the way ? Are you trying to flame some kind of fanboy war? Try again.

Nope, it's fact.

And, if it make's you feel better, the same could be said for the ps vita, and final fantasy is the only console series that can sell a million anymore, kingdom hearts was never even that popular in japan to begin with.

The last time a Metal Gear game for a home console sold better than 500k in Japan was in...2008.

That said, I truly want the next Metal Gear to sell well, it´s an amazing franchise, but I don´t see it matching those numbers on a brand new console, specially in Japan

I really hope i´m wrong.

Ok. now tell me what was the last home console game that sold at least 1 million copies in Japan.

I´ll give you a hint: it was 04 years ago.

True.  And the last time a Metal Gear Solid game released for a home console in Japan was... 2008.

Obviously, it's not going to match those numbers on PS4 in Japan.  But it's also spread across 4 different versions this time compared to the 1 version that was available for the previous entry.  Combined across 4 SKU's, I can see it doing similar numbers again.

(Unless the ridiculous new pricing model with Ground Zeroes turns everyone off).

what about Pace Walker and Rising: Revengeance ?

If youre gonna make the claim at least know what you are talking about. Rising isnt a MGS game. PW was a psp game... a system that had horrific SW sales. 

Underlined the important parts.  You said yourself "home console", I was comparing home console versions.  If we're including Peace Walker, then that sold far in excess of 500k in Japan.  But it's on a handheld so I thought we weren't counting it.

As for Rising... really?  It's a spinoff not developed by the original team; featuring one of the most disliked characters in the Metal Gear universe.   I don't see why you'd be expecting it to sell like the mainline titles.

So again, I don't really see the point you're getting at to say that Metal Gear is losing popularity in Japan.  The last numbers we had for it, it sold just as well as ever.

And just to further hammer the point home, I prepared another example.  Grand Theft Auto.  Last home console entry we had from that was also in 2008, which sold 420k on the PS3.

Then we had a spin-off (ish) which sold 130k and some PSP entries which didn't really make a dent in the sales charts (240k and 160k respectively).

"The series is losing popularity".

Nonsense.  Grand Theft Auto 5 released and eclipsed the sales of GTAIV in just two weeks, and has become by far the highest selling GTA game in Japan (560k at the time of posting).

Maybe Phantom Pain will sell less in Japan.  But there has been no evidence of the series declining on the evidence we've had so far.  The lack of a mainline entry since 2008 shouldn't really be evidence of anything (unless we count Peace Walker in our comparisons, in which case the series has actually been growing in recent years).