In the impression of people，Japan has long been a single-populated society that is highly exclusive to immigrants. In Japan’s immigration policies，for a long time，there has been a phenomenon that is contrary to traditional immigrant countries，namely it is more difficult for foreigners to acquire Japan’s permanent residency than obtain its nationality. Japan’s green card is the most difficult in the world. According to relevant laws and regulations in Japan，an ordinary foreigner is eligible to apply for permanent residency only if he or she has lived in Japan for more than 10 consecutive years，including paying working tax for more than 5 years. In recent years，in order to adapt to the trend of globalization，to address its population structure issues caused by low fertility and aging population，as well as to rejuvenate its sluggish economy，the Japanese government has issued a series of new policies on international migration. Since the fundamental changes in Japan’s immigration policies have not been studied by scholars in China’s international migration studies，the purpose of this paper is to study the opportunities and challenges China faces in the process of globalization，including：grasping the dynamic of international population flow from China to Japan，analysing Japan’s new immigration policies and the reasons behind，predicting the impact these new policies have on China’s international migration，and putting forward some policy suggestions. It is also hoped that this research can help people correct their unrealistic perceptions of Japanese immigrants caused by long-standing rumours.