I'm not entirely sure.
What we're seeing is that Japan is more and more accepting western franchises. Who would've thought how Assassin's Creed or CoD became such growing franchises in Japan the way they did just 5 years ago?
On the other hand, mostly everything that caters to more traditional Japanese playstyles will be on Switch, So outside of fans of those games or Sony exclusives I fear few will be interested in picking up a PS5, especially early on. But I don't know what the long term trend would be.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/