To introduce my graduation thesis to the job interviewer My graduation thesis is the study of Japan’s supporting policies on SME(small and medium enterprise) subcontractors in the period from 1990 and beyond. If we look at the Japanese economic history, we can find that since the collapse of the bubble economy in Japan in 1990, the country has been in economic downturn for more than a decade, which is totally different from that in its economic prosperity in 1970s and 1980s. Whereas, with the collapse of the bubble economy, thousands of Japan’s SME subcontractors who have made great contributions to the economy in 1970s and 1980s also entered a new stage. Therefore, I tried to probe into the content and the effects of promotion acts from 1990 and beyond by analyzing the official documents written by Japan’s Small and Medium Enterprise Agency. Also, In order to get better understanding of Japan’s SME supporting policies, I used to read the firsthand documents which are written in Japanese and translate them into Chinese to finish my research. During this process, I not only knew more about Japan’s economic policies but also made great progress in comprehending Japanese. Based on that, I aimed at finding out the reasons of those supporting policies with the theory of State Centrism and briefly predict the trend of Japan’s supporting policies on SME subcontractors. Under the theory of State Centrism, I found that reasons why Japanese government take positive policies to support the development of SME subcontractors are as follows: on the one hand, the prosperity of SME subcontractors can help the government to get more political and economic interests; on the other hand, the supporting policy has solid social foundation and a good interactive mechanism which help to reduce the execution cost. With these reasons, what can be predicted is that Japan will be continuously take supporting policies to encourage SME subcontractors to achieve better development. Such is a brief introduction to my graduation thesis. Thanks.