I think the actually "need" each other. Sony needs these JDevs just as much as they need Sony.

Only the stupid ones are doing that......

I disagree with a lot of what you have said honestly. FF13 would not have sold the same amount had it been only on the ps3 nor would it have been a better product for it.  Theres a fanbase for japanese devloped games on more than just sony systems and theres a few titles that prove this including ff 13. It's true that some devs struggle to get them on one console alone and when thats the case go for the platform that has the highest demand for such a game. Though when a game comes from square enix or Namco who are pretty big publishers I believe that they should go for multiplat to gain additional sales in alot of cases. 

Look at a game like resonance of fate developed by tri ace and published by sega it sold 600k on ps3 and 300k on 360 do you think that had that japanese developed game only been on ps3 that it would have gained those additional 300k on ps3 as well? I don't.  Maybe MGSV will sell less or on par with 4, but i can definately say that whatever sales it gets will be enhanced by being multiplat not hidered by it. 

The persona example is a good one but its not a definative thing as the tales remakes sold pretty bad on the PSV in comparison to abyss 3ds or even vesperia 360 in japan.

No one knows how much said games would have sold, or how much microsoft paid them. You can't say whether or not those decisions were bad last gen. This gen you don't see them doing that probably because they're not getting paid so it doesn't make sense. Least Risk with JRPG's is mobile/handhelds, because of lower production costs.

SE only gave up Last Remnant and Infinite Undiscovery.
Sakaguchi did Blue Dragon and Lost Odyssey.

If, and that's a big if VGChartz numbers can be trusted it's hard to say last gen going to only x360 really hurt them
You ofcourse could argue that sakaguchi on PS3 would have been humongous. But Sakaguchi on Wii was least impressive.

Infinite Undiscovery did 0.66 million
Last Remnant did 0.65 (Not counting PC sales).
Lost Odyssey did 0.85
Blue Dragon did 0.87 million

Comparitevely
Eternal Sonata 0.64 million (COMBINED, more on PS3)
Star Ocean 4 1.36 million (combined, more on 360).
Resonance of fate 0.95 million (Combined, More on Ps3)
Last Story 0.55 million
Xenoblade 0.84
Ni No Kuni 0.94
Nier did 0.77 on both x360 and PS3
Valkyria Chronicles 1.13
Tales of Vesperia 1.09 (more on 360, not released on PS3 USA)
Tales of Xillia 0.93 (this is wrong, but since I'm using VGC numbers for everything... :P)

There is no apples to apples comparison, Final Fantasy is the only somewhat apples to apples comparison though. And that's heavily favored in the PS3 side.

And as you have shown, the comparative list did a lot better, especially the exclusives. Eternal Sonata and Neir are the only ones seen as unsuccessful profit wise and they were both multiplat ironically.

I forget what Sakaguchi's beef is with Sony but we all KNOW his games would have done a lot better on PS3 rather than 360. Yet that is the route he chose, neither were profitable, and MS opted on not funding any others. NiNoKuni is rumors to have a sequel for PS4 in the making as we speak. Exclusively. VC was just above even, it did well enough to still get 2 sequels. Xenoblade 2 on it's way to WiiU.

Also take note of general reception of the exclusive ones rather than multiplat ones...

Japanese developers need Sony to sell well on consoles in Japan. They need Nintendo for handhelds in Japan. This has been known for a while.

 Selling 2/3rds on one console when you are multiplatform and the game isn't even a million sales is a sign that one of those could be dropped..... You realize Resonance of Fate won't be getting a sequel any time soon right? My guess is that its because it was not profitable, as in it didn't make the money back it needed to cover being multiplat. Just remember that 500k alone is profitable for any given Tales game that is exclusive(I say this because RoF is more likely to be similar in dev cost). If making almost double that while on two platforms isn't enough than something is wrong.

MGSV selling even with MGS4 will be just another game that Multiplat status is totally unwarrented. When will publishers realize that its not going to magically make people more interested in their game than they already are. The actual amount of ppl that miraculously become interested in a game only because it's on their system is negligible. If you hate MGS you are still gong to hate MGS if it comes to XBO.

The Tales remakes on vita did not do too good because they are remakes of remakes of games that weren't they well recieved in the first place, and as far as I know added nothing new to the games.......not like P4G at all really.

Let me put it this way... Vita will have more third party support in Japan than Ps4. Let that sink in a bit.

MS, imo, has given up on Japan. The evidence is right there in their console and exclusive deal with things like the NFL. They know their only market is the US and that's what they're falling back on. They can't lose that territory because if they do, they're pretty much done in the console market.

Having said that, it would be nice if they threw some money at some big Japanese devs. The Xbox brand is known for stellar FPS games, but not much else. I'd like to see some big JRPG on it outside of FF.

Just...*tear*