Now this post here is just sad and pathetic. Really really sad. Japan took the Senkaku islands in a war with China. Japan won fair and square. S. Korea took Takeshima after world war ii when Japan had no standing army. Similarily, Russia took the Kuril when the Japanese were retreating to homeland in the twilight of the war. As has been shown many times, China does not stand a chance against Japan in a naval conflict. Also, there will not be an invasion of Japan because China simply does not have the logistical ability (yet). S. Korea simply does not register militarily.No Asian countries like Japan.
The Japanese think that they own all the islands in the Pacific, but really Japan is only America's lapdog. South Korea and China will pwn Japan. The Russians took the Kuril Islands from the Japanese after WWII and the Russians will never give it back, and there is jack shit the Japanese can do about it. Same goes for Dokho and Diaoyu for the South Koreans and Chinese. The era of Japan is pretty much over, just look at Samsung vs. Sony.
Japan takes territories very seriously so the Russians may negotiate in order to normalize relations with Japan.
Finally, as for Samsung vs. Sony, Equating two companies to the larger nations is interesting but false. How many S. Korean companies are world famous? You can count them on one hand. Hyundai, LG, Samsung. There may be one or two others. Fact is, S. Korea does not have a vibrant SME sector that Japan and Germany have. That is why the S. Korean economy is so lop-sided. That is why the S. Korean economy is heavily dependent on a few giants and extremely dependent on exports. That is why the S. Korean economy imports far more from Japan than Japan from it. The truth is, Sony can stumble and Japan will be fine. Should Samsung stumble the entire S. Korean economy will implode.
Returning to the nations' militaries, I find it interesting that you consider Japan weak militarily since that was her choice. As soon as these nationalists come to power or if Japan changes course and decides to normalize her military, I have no doubt that people like you and the leaders in east Asia will shit their pants and protest it.
Finally, Japan does not really care about what the people of China and S. Korea think but the people of China and S. Korea are obsessed with Japan, her successes, her culture, and her past. It is an unhealthy obsession that leads to S. Koreans committing suicide when a Japanese utters simple words or Chinese destroying their own communities when a transaction or words are exchanged in Japan. It is worse than pathetic.