Kevin_Kennedy
The link below chronicles the timeline of Senkaku dispute between China and Japan. Note that in 1969 the UN reported that there was oil deposit near Senkaku Islands. Two years later, China and Taiwan officially claim Senkaku Islands. Don't you think that is bizarre?
Timeline of Japan-China Dispute Over East China Sea Islands
I think there's a problem with your link, and that problem is that the timeline only goes as far back as 1895 and cites no sources to back up its claims. China was at one point the most advanced civilization on the planet and could very well have made a claim on the Senkaku islands before Japan. Does that mean that they did? No, but it does seem strange that an ancient and expanding civilization would simply ignore uninhabited territory for so long.
Regardless, let's assume that your link is correct. "Japan unilaterally annexes five islands and three barren rock groups in the East China Sea, calls them "Senkaku."" Where did Japan get the right to unilaterally annex these islands? Does taking and administering the islands, as you called it, give them the right to the islands? Of course this criticism also applies to China. Assuming they had annexed and administered the islands I see no more right for them to claim them than Japan.
Furthermore, I find your position that Japan's alleged claiming of this territory in earlier times gives them a right to the islands today a bit hypocritical. Earlier in the thread you said of China, "What is their excuse for invading and killing Tibetans?" Their excuse is the same excuse you're putting forward for Japan's ownership of the Senkaku islands, that Tibet was a legitimate part of China and that they were simply reclaiming their territory. If you're going to accept Japan's ownership of Senkaku on this basis, and assuming that it's factually correct, then you have to also accept China's ownership of Tibet because nobody disputes that Tibet was a part of China for a long time before they tried to declare independence during the Chinese Civil War.
My position is that neither Japan nor China has a legitimate claim to the islands, and that their military posturing over the islands, along with the U.S. government's backing of Japan, is possibly the most dangerous conflict on the planet right now.