So I just got a new PC and the game doesn't run, I open the English launcher and when I click Play nothing pops out. Already changed to JP locale, I can play the game no problem in my old PC. Using windows 11 on both
If the game don't even start, here a few probale cause :
1) Win can't read the exe and start it because of the path name (path name too long or with non readable - ie foreign - characters in it). Try moving the game to the root of a HDD with a simple name for the folder to test
2) Your AV is kicking if for whatever reason (try adding an exception or temporary disable it if you're certain of the software origin)
3) save date is corrupted - delete the game save folder in appdata and try again (don't forgot to make a backup save before deleting)
4) Shouldn't be the cause, but you may still try => change non local unicode to JP or use emulating tool to run in JP setting (LE or NTLEA). You might want to try forced admin mode too.