This thesis uses history research method to discuss how Taiwan Issue affects China-Japan relations and how it evolves between China and Japan relations. In spite that China and Japan established diplomatic relations around 1972, for these two countries, Taiwan Issue is a very sensitive issue. At the same time, China always insists her opinion on Taiwan Issue. Although Japan follows the “One-China policy” that was described in the time of establishing diplomatic relations with China, China is still demanding that Japan should admit the ground that Taiwan is a part of China. But, Japan replies this issue by the vague policy of showing respect and understanding. However, when entering the post cold-war period, because of Japan’s vague attitude towards Taiwan position and also when China sees the obvious advanced development of Taiwan-Japan relations, it causes China to doubt that the “Taiwan complex” of Japan towards Taiwan hasn’t vanished.
From World War II till now, Japan’s diplomatic policies are still principally based on the US, and after Japan concluded “the US-Japan Security Treaty” with the US, in one way, under the restrictions of Japan’s Peace Constitution, Japan’s security has to rely on the US; in another way, because of the sixth article of revised “the US-Japan Security Treaty”, what is called, the Far-Eastern Treaty, Japan became the key role of Far-Eastern strategies for the US. Later, “Taiwan Strait Crisis,” which happened during 1995 and 1996, made Japan awake again that any conflict which happens in Taiwan Strait might affect the security of Japan itself. Take this matter as the starting point, Japan gradually changes the way of thinking that China keeps advocating “Taiwan Issue is China’s internal issue.” Moreover, in 1997 the US and Japan jointly announced the “New Guidelines for US-Japan Defense Cooperation,” and in this announcement, that if the extent of “situations in areas surrounding Japan” is including Taiwan Strait made China doubt that Japan may step in Taiwan Issue not only politically but also militarily. And this act from Japan made it more difficulty for China on solving Taiwan Issue. In 2005, on the declaration of the US-Japan 2 Plus 2 Security Consultative Conference, it was the first time to mention Taiwan Issue formally. They changed the vague policy of situations in areas surrounding Japan, which they insisted before, and clearly stated the US-Japan Alliance’s standpoint to Taiwan Issue.
Besides, For China and Japan, Taiwan’s strategic position is the venue of strategic advantages. Therefore, the relations of China and Japan are affected because these two countries both try hard to protect the advantages of this area. For Japan, Taiwan is not only the “Lifeline of Japan” but also closely related to Japan’s Security Policies. Comparatively, for China, Taiwan can be treated as the center of China’s strategic development. As well as Japan, in order to import petroleum smoothly, to retain the safety and stability of Taiwan Strait is also to affect the stable development of economic.
According to the results of this study, we found that Taiwan factors on influencing China-Japan relations can be generalized into the following four points: Firstly, Taiwan-Japan relations are changed from “Semi-official” to “Quasi-official”; secondly, the peace and stability of Taiwan Strait is important on the development of both China and Japan; thirdly, Japanese new-generation politicians accelerate the development of Taiwan-Japan relations; fourthly, the rise of Taiwan Issue is against the safety development in Asia-Pacific Area.