I agree with GZ: IIRC, the Soviets began to establish a Red government in Manchuria after the invasion with the intent of forcing a de-facto split just as in Korea and Germany, Chiang made the biggest gamble of his life and decided to crush it, and ended up on the run. Taiwan was under Japanese control at the time of unconditional surrender and therefore comes under brief US control. Commies fleeing there? Not likely.
We need a PoD which changes the nature of Taiwan. I believe some Japanese politicians were dubious about permenant colonies in 1895 and wanted to sell it to France?
What of butterflies? Hmmm. I may be wrong, but I can't think of any big ones immediately. The problems of China have been highlighted by military defeat and territorial loss just as much. Japanese colonial attitudes and politics may change, but that's not my field. Assuming very minimal butterflies, which may not be true, the Pacific War as we know it can still come about if the Japanese grab Taiwan from the French at the same time as Indochina.