AHC: A post-Pacific War Republic of the Ryūkyūs

The challenge: rather than the 1971 Okinawa Reversion Agreement, with a PoD post Pearl harbor, at some point after the end of the Pacific War, have lasting (no temporary coups or such by the Ryūkyū Dokuritsu Undo) independent Republic of the Ryūkyūs established.
 
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