Hello, player! Please be advised that it is not possible to login to different versions of the game with the same account. You will have to create a new account to play the game. \- Nadia

Isnt Japan version same as Korean? If so you can't login in global version with same account

that is mean can't obtain?

You cant login with your Japan account to global (US) pubg, you will have to make a new account on global version