[quote=@Brithwyr]
Can I claim Korea? 
[/quote]

You'll need to talk to our two prospective Japanese claimants, since in this world Japan would still own Korea and Taiwan and if they're proposing civil war the outer territories might be forced to side with one or the other, or they're independent, or they're left to be loyal to Japan but not taking sides so not independent. You'll need to wait for their apps or speak to KGP or Clock.