You list a multiplatforms that were in development years back (as much as 5 to 6 mind you) before the situation today those games are PS4 games with the exception of two and to add to it you listed a rumoured game that has no official announcement or platform yet it would be like if we listed the rumoured Resident Evil Revelations 3 for Switch I know you'd argue that the is no confirmed titled. Going forward we only know FF16 and Forspoken were PS5 games, mean while for Switch going forward we have Falcom now bringing all their games to Switch now starting with the entire Trails series being released by the end of next year this follows them releasing Ys VIII and IX, Nippon Ichi are now more focused in pushing Switch versions of their games with ironically Disgaea releasing in the west on it but not on PS, Vanillaware are bringing 13 Sentinels to Switch with added content but curiously no PS5 version despite the game releasing on PS4, Capcom have continued their support of MHR even SE have TP and Voice of Cards out in two months as well no PS5 versions in sight.

This is a better representation of where Japan is heading than the two next gen games for PS5 even only one is out next year the other will take time and may find it's way onto the Switch successor to try and salvage the series' decline in the region, I'll even take a bet right now with you that DQXII already has a Switch version due to the platform's sales in Japan. The developers are in the mean time getting on board the NS to maintain business in the region they don't care about wayward raytracing consoles have.

Let me break it down to you what people are saying, the PS4 and PS3 at least had some notable presence for Sony in the region but the brand is on a significant decline, if the current performance of the PS5 is an indication going forward to the point Sony can't be bothered to get stock in the region the market has to pivot elsewhere to be viable. At the current rate if a Switch successor arrives in 2024 the PS5 will only be at 3-4m in the region if this continues and should even some of the momentum of the Switch carry over it will over take the PS5 in just a year and the power gap that you're relying on in your argument here will be either gone or a none issue we've already seen Nippon Ichi do what I am pointing out expect the rest to all do the same at that point. This is the whole point people are looking at and you've not presented a single thing to debunk.

You claimed Nioh was the best selling Koei title, but it isn't. And I think Koei execs could care less that their best-selling title is a Nintendo-cooperation, while they count their money.

You boldly go on with lies as you claim, the publishers you listed make 80% of Japanese 3rd-party software sales, yet the actual data says different:

https://www.neogaf.com/threads/konami-is-the-top-selling-third-party-publisher-in-japan-2020-and-momotaro-is-the-best-selling-game.1583745/

And even looking at said publishers:

Capcom shows they make more than 19% of their revenue in Japan (again less than 2% of world population)

https://www.capcom.co.jp/ir/english/finance/img/img_title_03a.svg

So yes, even the strongly western oriented Capcom has a signifant portion of their revenue from japan.

Sure, as a westerner you might not care about Japan, but that doesn't mean japanese devs share your opinion. They want to make money. Japan is a significant market for them. So they will continue to pursue that market. If Playstation is unable or unwilling to support them in that, they will look into other options. As they already do. As I said, pretty much every japanese dev nowadays diversifies their portfolio onto mobile, PC or Switch.

Wow Ninetndo's first consoles the NES, is still the best selling with regards to software

The Switch's software peak should be next year, so I'm confident that it'll reach at least 200mil software.