Here's the Asian history buff reporting.
Okinawa is, for those of you who don't know, the largest in a chain of islands known as the Ryuku Islands. They are in the south of Japan, ranging from a few island groups south of the southern tip of
Kyushu to the 75 miles northeast of Taiwan. The chief island is Okinawa.
The Ryuku Islands throughout history enjoyed large autonomy. It was known as the Kingdom of the Ryukyu Islands, which had its own king. This civilization paid tribute to both China and Japan, and was neither claimed by one or the other. Thus, the Ryukyu Islands enjoyed considerable amounts of Chinese (from China and Taiwan Province in the south) and Japanese influence.
In 1875, nationalistic fervor began in Japan. Japanese Imperialism hit Okinawa, when the Japanese took over the island, deposed the monarch, and annexed all the Ryukus to Japan. Of course, because the Okinawans had been open to Japanese influence before, and because they were arguably Japanese, it was not seen as a military invasion and occupation, because Okinawa always had paid homage and tribute to Japan.
From 1945 until 1972, Okinawa belonged to the United States. The Americans in a way arguably prevented the Communist Chinese from invading the island, which they would have if Okinawa was made a seperate country after the Allies carved up the Japanese Empire after World War II.
In 1972, Okinawa was ceded to Japan, while American navy and army bases are still there today.
Thus, Okinawa regards itself as part of Japan. Culturally, religiously, politically, and most importantly lingustically, the Okinawans are much closer to the Japanese than to the Chinese. Thus, Okinawa was never stolen by either China or Japan, it was a buffer zone between the two.
Today in Okinawa, there is an extreme left seperatist group, known as the Okinawan Social Masses Party, but it is largely defunct. So, Okinawa would have a higher chance of becoming independent than being given to China, and even that is unrealistic.
Okinawa is Japanese territory, the Okinawans, the Chinese, and the Japanese acknowledge that fact.
Hope I helped. ^^;