This thread is regarding how Taiwan can be part of Japan, not about the politics of Taiwan. If you want to discuss this issue, I would suggest starting a thread on the chat forum and we'll discuss it.
So I'll try to ignore the political aspects of your posts.
My apology. Especially if people feel i am a little intrusive as a new member. This is a topic i've heard and argued since i was a teenager, can't help but jump in...
My point is simple, Taiwan to be kept as part of Japan or not, isn't the same situation to Corea, or merely the result of one military action. It's a complicated regional antagonism, involving China, Japan, US, to this day.
Rewarding Taiwan to a allied China, to keep its resistance is the US intention at that time, especially when 1/3 of China was still in Japan's firm grip, (which covered almost all coastal provinces, the more industrialized, productive, urban area), KMT/CCP could barely control inland rural area, off from outside supply, by high mountains behind.
If things kept the way it was, KMT regime would collapse itself. some KMT officials were anxious to have a truce talk with Japan, in fact, US did caught intelligence that KMT sent guys to talk with Japan secretly.
So back to how to keep Taiwan as part of Japan?
Put aside Japan won the war, China reached a secret agreement with Japan might be another possibility. Angered US would no longer want to reward China with Taiwan, even Japan still lost the pacific war to US, it may leave Taiwan as Japan's territory or put Taiwan under UN's trusteeship.
Since Taiwan is at the pivotal point of China, Japan, US, where Taiwan go reflects the influence of greater power. To keep Taiwan Japanese, without a mighty Japan, the balance would be either US+Japan>China, or China+Japan>US.
A single mighty power owns Taiwan would be like to insert a dagger in between the other two.
In WWII, Taiwan effectively provided assistance to cut off US supply from sea to China, and acted as a springboard to attack China, and southeast Asia. Today's domestic airport, Taipei SongShan Airport, is the former Japanese military airbase, where many bombers, fighters took off to assault mainland China, and later became a kamikaze base.
I agree with you there, as a Hainanese with regards to the KMT holding Hainan. The distance is one issue, but Hainan had strong communist guerilla activity while Taiwan didn't. The Hainanese Communist Guerillas coordinated with the invasion force and helped Hainan to be captured.
Your agreement is very much appreciated, especially for a Hainanese. Nevertheless, allow me to finish the following, after that, i will tone down affairs about Taiwan.
An unproved history. Taiwan governor intended to keep fighting after emperor declared unconditional surrender. His officials estimated those stockpile of ammunition and food are enough (under ration) for 1-2 years of resistance against US invasion. Even later mustered some Taiwanese social elites to consult their willingness to form a new country.
My point is, Taiwan, then, a long time self-sufficient island, capable of exporting surplus to support Japan's war action, offered KMT not only place but also huge resources to keep CCP across the Taiwan Strait. Not merely distance or CCP guerrila.
Lot of military materials like, ammunitions, rifles, bunkers, etc, left by Japan, rice, cement...strategic materials were also abundant while kept producing.
(At 1945, Taiwan is already a industrialized, or semi-industrialized place, pls refer to Formosa Calling)
http://homepage.usask.ca/~llr130/taiwanlibrary/formosacalling/formosaframes.htm)
KMT later absorbed many former IJA Taiwanese soldiers, well-trained, to fight for its civil war, and defense Taiwan after 1949.
Without Taiwan, KMT doomed to perish.
The troop deterred CCP invasion in 823 artillery bombardment (Kinmen), trained by famous general Sun-Li-Jen, with KMT troop title, was in fact composed of Taiwanese draftee.
Sun-Li-Jen's original troop had long gone, only title left.