So I take it you suggest keeping manch kaput and move korea into manch and keep kaput.
guess you doing J3 declare war. but then your transported will get blocked so you can only nab malaya borneo and pinoy. (I guess you can hover over a spot with the transport that starts from japan over sumatra).
but if you leave them there on J1 russia moves west and enters through the backdoor of china, he’ll get to kansu before you.