We accomplished all three objectives at once: 1) conquer coastal China (which was where the bulk of the population), 2) eliminate European forces from Asia-Pacific and 3) crush the allied combined naval force in the Battle of Java Sea, strike the American Pacific Fleet.
Unfortunately, with our forces concentrating majority of the Imperial Navy, Air Force and Army against the United States in the Pacific Theater, our possessions in mainland Asia were largely left to Korean conscripts or new trainees in the Imperial Army. The goal was a short victory with the United States, but we underestimated the American resolve , and of course their manufacturing capability to persecute the war to their favor.
But now i am digressing from the subject matter, so let's get back shall we.
Cheers,