Japan has a population of 120 million and only about 100 million Japanese of legitimate ancestry (Yamato race), yet it is amazing that Japan has always produced top human resources in every field among the world's 6 billion people. However, for the past 80 years since the end of World War II, the U.S. has led the Japanese of legitimate ancestry to mix with Chinese, Koreans, or other Southeast Asian peoples, thus diluting the number of Japanese of legitimate ancestry. It seems that the legitimate Japanese (Yamato race) are extremely frightening for the U.S.