Maybe putting IGDB checks if that game has a Japanese only release date added to redirect you to the "ja-jp" link?

And to do the same when that game has a release only for region in specific?

Maybe it's too complicated and isn't
really worth it to implement 🤔

elDexterr did find something great, I tried it out and unfortunately so doesn't it solve all problems.

Japan exclusive games ends up with error pages. "ハルキス" was just released with concept id 10004953.

https://store.playstation.com/concept/10004953 ~ takes me to en-se, since I'm in Sweden. Error page.
https://store.playstation.com/en-us/concept/10004953 ~ error page.
https://store.playstation.com/ja-jp/concept/10004953 ~ works!

I would assume that https://store.playstation.com/concept/10004953 should take me to a page that works. If it doesn't find it in en-se, look in en-us, then in ja-jp, or something along those lines.

So the link is still region specific.

Looks like the PlayStation Store finally has universal URLs that work for every region.
Although there are some caveats, first the store seems to redirect you to the new universal URLs whenever it feels like it?

I managed to do it with Dying Light 2 (US store), but then the store stopped doing it? And redirect me to the old URL...

So far the only games I have found to always redirect you to the new URLs are the Persona 3 & 4 remasters.

Although there's a method to get the new URL manually for any game.
• In Chrome press F12 to inspect the page's code.
• And search (Ctrl+F) for "Concept:"
• A number should be next to "Concept:XXXXXX", in Dying Light 2 case being "232374".
• Now paste that number here:
https://store.playstation.com/concept/HERE

And the store will redirect you to that game page for your store's region.
I tried with the japanese store and seems to work too.

Dying Light 2:
https://store.playstation.com/concept/232374 (Universal Link)
https://store.playstation.com/en-us/concept/232374 (US)
https://store.playstation.com/ja-jp/concept/232374 (JP)

Potentially the ability to add links to sites not on the list. For example, some Game Developers publish and sell their own games on their own website/storefront (ie. Origin, Ubisoft). Additionally, some lesser used or known Game storefronts are also used for example MSN Games or Big Fish Games.

in addition to this:
There should be two Versions of the Microsoft Store:
"Microsoft Store (PC Version)" and "Microsoft Store (Xbox Version)"
Many Games have two different Versions in the Microsoft Store.
For Example "Cities: Skylines - Windows 10 Edition" and "Cities: Skylines - Xbox One Edition"

Also missing: PlayStation Store, Origin Store and Ubisoft Store