Recently, geopolitics in the East Asian Region is getting complicated. On May 8, 2013, a mouthpiece of the CCP, People’s Daily, published an article, questioning sovereignty of Okinawa by two Chinese scholars. On the following day, a Japanese spokesman, Suga Yoshihide, protested Beijing’s claim by saying Okinawa is “unquestionably Japan’s territory historically and internationally (BBC News, May 9, 2013).” As soon as the Japanese government complained about Okinawa’s article, the Chinese Foreign Ministry Spokeswoman, Hua Chunying, stated, “China does not accept Japan’s representation or protest. The publishing of the bylined article demonstrates the attention paid to and the research of the Diaoyu Islands and related historical issues (Xinhua News, May 9, 2013).”
Source: Jiji Press (Access date: May 15, 2013).
Based on the research of historical documents, President Roosevelt, along with Marshall Stalin, recognized that the Liuqiu (Okinawa) was a part of the Chinese territory. For instance, on January 22, 1944 of the post-Cairo conference, at the 36th meeting of the Pacific War Council, which chaired by President Roosevelt in the White House, both Roosevelt and Stalin are “in complete agreement that they (Liuqiu islets) belong to China and should be returned to her (China) (emphasis added).” Among the council members, ambassadors and representatives from the U.K., Netherlands, Canada, Philippine, New Zealand, and Australia attended the meeting. The Chinese Ambassador, Dr. Wei Tao-ming, also joined the Pacific War Council meeting. The major discussions were the territorial issues including the Kurile islets (the Northern territories between Japan and Russia), Manchuria, and others. The Liuqiu Islands was one of major agenda items in the meeting (details in my forthcoming book).
Source: Leaders from China, the US, and the USSR in Cairo, PBS (Access date: 19 May 013).
If both the U.S. and the U.S.S.R. governments, the winners of the World War II, recognized that the Liuqiu Islands were parts of the Chinese territory, the Diaoyu Islands would not be an issue between Japan and China at all. In other words, Japan might have difficulty claiming any sovereign right of the Diaoyu Islands; history probably is not on Japan’s side.