To the east of the line, territory can be acquired by conquest, and all conquered "chinese" terrtory is returned to #japan
Sure, #china conquered it from natives in the 14th century or whatever, but no American can begrudge them that and still believe in the legitimacy of USA, amirite.
#japan did great work in suppressing native culture and language and transferring their own population in there so to the victor the spoils i guess!
And Okinawa is a great spot for the US navy, so that's nice