I hope the Japs agree with you.
That is also irrelevant. At this point of time, the Japanese are strong, militarily, technology-wise, and economically. They have long had experience with rocket and nuclear technologies. The Chinese are playing catch-up. China has raw numbers of people as an advantage. Well, so do the Arabs as compared to tiny Israel - yet Israel handily beats the Arabs.
This is all changing, to Japan's detriment and to China's benefit. The Chinese are not Arabs. What I foresee, in the near future (perhaps 15 years away) is a brokered alliance between China and Japan. Japan is becoming weaker partly because of their aging population and partly due to few native resources. China is strengthening. An alliance similar to that of the U.S.A. and Great Britain, where China and Japan work with each other, may occur. Of course, the future understanding will be that China being the stronger takes the lead.