no only a rrd manchuria, japanese china, and perhaps Korea. The soviet navy is a joke. The IJN would wipe the floor with the soviet navy. ergo the pacific empire would be untouched. Unlss Japan attacked USA.
The communists would likely make gains in at least northern China as well as Manchuria. The blue-water IJN would have to patrol the Yangtze for insurgents, which wouldn't sit well with the proud naval officers, nor would knowing they're trying to clean up the mess the Army made.