Many would rather go bankrupt than be professional and support nintendo. And those are quickly becoming the only 2 option for most japanese developers.

If SMTV come to ps4, then P5R must come to Switch in exchange, and Switch also have Night of Azure 2

ps4 mostly competed with the wii U (a harder fight than what most people think thanks to INSANE staying power of splatoon, ps4 only surpassed WiiU around when the NSW was announced officially), while the 3DS was absolutly CREAMING the vita despite japan being the vita's best reigion by far. so basically PS4 was alone in its target market, similarly with the 3ds.

then the switch came along and threw a wrench in the ps4's long- term selling power in japan.

ps4 is mostly still coasting along its pre-2018 install base.

the PS5's the first playstation since the first where its future isn't guarenteed in japan, and that might be enough for japanese devs to shy away from developing up to ps5 levels of power, its a similar situation to when the ds and psp came along and console gaming never recoverd its previous status casue the psp/ds was "powerful enough" for most devs, exept that now the switch has enough juice to run ANY type of game as long as you restrain and optimize.

Meanwhile in reality:

Nearly all publishers are making great money, some like Capcom and KT are making more money that they ever have lol

Doesn't work like that. They are different teams and deals. 

This is not true at all. PS4 had to compete with WiiU and 3DS. 3DS was far stronger than the SW and had far more exclusives (MH,DQ,YW) which the SW does not. 

PS4's sales cycle is pretty much in line with PS3's. PS5 will get more Japanese support than the SW, just like how PS4 got more Japanese support than the SW, because Playstation is the dominant platform for global software sales. 

Meanwhile in reality:

Nearly all publishers are making great money, some like Capcom and KT are making more money that they ever have lol

Doesn't work like that. They are different teams and deals. 

This is not true at all. PS4 had to compete with WiiU and 3DS. 3DS was far stronger than the SW and had far more exclusives (MH,DQ,YW) which the SW does not. 

PS4's sales cycle is pretty much in line with PS3's. PS5 will get more Japanese support than the SW, just like how PS4 got more Japanese support than the SW, because Playstation is the dominant platform for global software sales. 

If SMTV come to ps4, then P5R must come to Switch in exchange, and Switch also have Night of Azure 2

Koei Tecmo can probably thank Nintendo Switch for some of its contributions to their recent success.

Thanks to games like:

Marvel Ultimate Alliance 3

Alteiler Ryza

Fire Emblem Three Houses

Attack on Titan 2

And Fairy Tail and Warriors Orochi 4 Ultimate

We’ll just have to see how the upcoming years pan out for PS5 in Japan.

whether you care or not, the Switch is the dominant console in Japan and only the corona virus has affected sales as production of all consoles (even possibly the upcoming consoles) have slowed down. 

Koei Tecmo can probably thank Nintendo Switch for some of its contributions to their recent success.

Thanks to games like:

Marvel Ultimate Alliance 3

Alteiler Ryza

Fire Emblem Three Houses

Attack on Titan 2

And Fairy Tail and Warriors Orochi 4 Ultimate

We’ll just have to see how the upcoming years pan out for PS5 in Japan.

whether you care or not, the Switch is the dominant console in Japan and only the corona virus has affected sales as production of all consoles (even possibly the upcoming consoles) have slowed down. 

Most of the games you listed are multiplatform. Games like Atelier, did way better on PS4 than SW. 

You're also missing KT's biggest hit in its entire history: Nioh. 

Doesn't work like that. They are different teams and deals.  

Most of the games you listed are multiplatform. Games like Atelier, did way better on PS4 than SW. 

You're also missing KT's biggest hit in its entire history: Nioh. 

You straight up moved the goal post, because Koei is pretty happy with their Switch sales otherwise they wouldn't keep porting games to the system. 

Hell they said this back when the Switch was only a few months old and they only had a few games on their

https://gonintendo.com/stories/294156-koei-tecmo-extremely-happy-with-their-switch-game-sales-believ

We also only know their platform split in Japan, every other country is unknown. But its very safe to assume their games worldwide sell great on Switch.

And? Where are SMTIV, IV Apocalypse and Strange Journey on ps4 then?

Multiplatform or not, that's not my point.

My point is that whatever Koei Tecmo released on Switch in Japan, they have found success. Doing worse than PS4 shouldn't be an insult or a negative towards the Switch. The games are doing well on Switch. Selling worse than another console shouldn't mean jack without context. Consider the developers/publishers' expectations, percentage of stock being sold, sales legs, etc.

Also, as of now, Fire Emblem Three Houses appears to be not far behind Nioh in the sales department with 2.58 million sold worldwide as of December 2019 and likely received a sales boost thanks to Byleth's inclusion into Smash Bros. Ultimate and the recent release of the new story DLC for Three Houses.

And? Where are SMTIV, IV Apocalypse and Strange Journey on ps4 then?

Those are 3DS games lol

Exactly, and SMTV is Switch game, no more no less