During the PS3 I dont think this was just a Japanese developer thing but the whole industry that basically said they were gonna force the PS3 to success. The PS3 got every multiplatform title and it's exclusives regardless of it being difficult to work for, very expensive, and was selling like crap. But once the WiiU was in a similar bind even when 3rd parties were infact ready to support it, they hightailed it out of there at the 1st sign of trouble.
Abandoning the Wii U made sense because it was selling worse than the PS3 ever did, and didn't bring anything worthwhile to the table, power or feature-wise. The fact that Nintendo themselves never managed to find a way to sell people on the Gamepad speaks volumes about how bad of a product it was.
The Switch, however, has been selling on par with other market-leading consoles and addresses the divide between Japan and the rest of the world - Japan has a strong preference for portables while the rest of the world favours stationary hardware. If I'm a Japanese developer, I'm making the Switch part of my development pipeline to cover all bases, especially if my games aren't advanced enough to require PS4 level hardware. There is absolutely no reason for the likes of Falcom to be dragged kicking and screaming to support the Switch.
