日本雖在1952年與中華民國政府建交，但是，日本外務省在2002年12月24日公佈1950、60年代為主的外交檔案顯示，日本與中華民國維持良好的邦交關係的同時，已在「一中一台」、「兩個中國」外交路線摸索。實際上日本在1972年與中共關係正常化，並與中華民國斷交。但是日本在冷戰結束後的現在也沒有改變他「兩個中國」的構想。90年代以後隨著中共的經濟力的提升，中共在東亞的崛起，引起了美、日及亞太周邊國家的戒心。為防止中共向西太平洋擴張的意圖，藉日美新安保宣言架構，承諾對台灣的安全。同時從地緣政治的角度來看，台灣具有高度的戰略價值，如果台灣被中共所併吞，會變成對日本更直接的威脅。因此，日本雖然已在1972年與中共建交，但是還是沒有跟台灣完全斷絕政經上的關係。在中國政策上繼續進行模糊化的「兩個中國」政策，此成為其對「台灣政策」的重點。 本論文主要使用外務省所公開的有關日華關係的機密檔案，首先從戰後日本各內閣時期的政策中，探討日本之台灣政策的發展。第二是探討日本的台灣政策中「兩個中國」政策之形成背景及原因。第三個研究目的就是分析日本「兩個中國」政策失敗之原因。第四是從各時期之「兩個中國」政策的轉變與發展，探討其是否有一貫性。 根據分析結果，日本之「台灣政策」具有其不斷嘗試與一致性之方向，即在不斷摸索「兩個中國」構想的同時，在經濟方面的日漸需求下，亦不放棄與中共進一步交往的機會，以致於從「政經分離」以及「累積」的想法中，試圖接近與中共的關係。另一方面，不斷嘗試對台之「兩個中國」構想，卻始終受到來自於美國、中共與台灣的反對。

冷戰結束後的世界，使人們重新思考安全的定義，傳統的安全觀已無法應付日益嚴重的全球性危機以及許多非軍事領域的問題，安全的涵蓋面向從國防、軍事延伸至經濟、社會、政治、環境等領域，而安全所關注的對象亦從國家擴展至國際及社會、個人層面，新的安全觀逐漸被重視，其中以提升個人及全人類安全與福祉的人類安全，最符合聯合國及國際社會所強調的以人為中心的發展及安全觀。 人類安全概念經聯合國開發計畫署闡述後，受到國際社會之重視與推展，其實踐需結合全球治理與全球公民社會之理念，經由保障及自授權力兩途徑，使人們之自由與安全受到保障，並有能力維護自身與他人權益。國際上，以闡述並推行人類安全為宗旨之國際性組織與委員會相繼成立，聯合國中亦有人類安全信託基金之設置，對概念之研究與計畫之推動均有相當大的貢獻。而在各個國家中，以加拿大和日本推行人類安全成效最為卓著，在提升免於恐懼及免於匱乏的自由上，均有相當大之進展。 台灣身處軍事敏感地區，一方面有全球化下各國非傳統安全問題跨越國界之威脅，一方面亦有自身內部經濟、社會等領域之安全考量，為提升台灣人民之自由、安全與福祉並與國際社會接軌，台灣應以人類安全為基礎，結合非政府組織與公民社會力量，積極參與國際議程設定，與國際社會對話，維護自身生存與權益，負起推動並維護人類永續發展之責。 本論文從歷史發展過程，探討人類安全及相關概念，在安全概念之演變部分，首先探討傳統安全概念、後冷戰時期國際局勢之演變以及非傳統安全問題之顯現，接著介紹聯合國開發計畫署1994年之《人類發展報告》、以人類安全為主題之國際各大會議與國際組織的討論，以及聯合國相關組織與人類安全之關連，並對聯合國所扮演之角色提出建議。 在人類安全概念內涵部分，首先介紹國際組織、加拿大、日本及學者們對人類安全之定義，其次介紹人類安全之指標、人類安全與其他安全概念（如合作安全、綜合安全）之區分，最後則闡述人類安全與人權概念間之關係。 在人類安全的實踐部分，首先介紹人類安全之實踐途徑與方法、全球治理理念與全球公民社會之概念、亞洲國家對人類安全之觀點、在國際上對人類安全的實踐以及人類安全之爭議。 在人類安全與台灣部分，提出台灣所面臨之各類威脅，並引用人類發展指數相關概念介紹台灣發展現況，以及介紹加拿大與日本以人類安全觀點為基礎之外交政策及實踐成果，希望對於台灣人類安全之推動能有所啟發。 / After the end of the Cold War, people started to rethink the definition of safety. The traditional view of security was no longer capable of dealing with serious global crises and other daily non-military problems. The study of Security extends from national defense and military affairs to such fields as Economy, Society, Politics, and Environment among others; its target also expands from that of the state to the international, the social, and the personal. The new view of Security has been given a gradual increase of attention. Among such, Human Security, which is the improvement of the safety and welfare of individuals and the entire mankind, accords with the view of people-centered development and the view of people-centered security that the United Nations and the international community emphasize most. After explaining the concept of Human Security in the United Nations Development Programme, it received the international society’s attention and impetus—the practice of which requires the effort combination of the whole world and the global civil society, via the ways of protection and empowering, in order to guarantee the freedom and security of mankind, allowing every person to have the ability to safeguard one's own and others' rights and interests. On the international level, international organizations and committees with the purpose of explaining and promoting Human Security have been established in succession. Furthermore, the Trust Fund for Human Security has also been established in the United Nations. Such establishments have exhibited sizable contributions to the research of the concept of Human Security and practice of relevant plans. On the national level, Canada and Japan pursued the issue of Human Security and thus had the most effective and immense progress in promoting the freedom from fear and the freedom from want. Taiwan is located within a military sensitive area. In addition, globalization also contributes to threats on non-traditional security matters across national boundaries of several nations. Furthermore, Taiwan must also possess considerations about its internal safety on the economical, social, and cultural level. In order to improve the freedom, the security, and the welfare of Taiwanese civilians and to integrate Taiwan into the international community, Taiwan should undertake Human Security as its foundation for the combination of non-government organizations (NGO) and civil society forces, so as to actively participate in the international agenda, communicate with the international community, maintain its security and its, rights and interests, and shoulder the responsibility to safeguard the sustainable development of human beings. This thesis looks into the concept of Human Security via historical analysis. In the section regarding the concept of the development of security, this thesis explores into the traditional concepts of security, the development of the international situation during the post-Cold War era, and the appearance of non-traditional security issues. Consecutively, this thesis will introduce the " Human Development Report " of the United Nations Development Programme in 1994; it will also present the discussion of the theme of Human Security by international organizations and other great meetings of the world, Finally, this section closes with the issue on about the relationship between United Nations’ relevant organizations and Human Security, and a suggestion on United Nations’ role. The section of the concept of Human Security introduces the definition of Human Security given by scholars, international organizations, Canada, and Japan. The introduction of the index of Human Security and the explanation of the relationship between the concept of Human Security and the concept of human rights will follow. The following section—the practice of Human Security — introduces the ways and methods to practice Human Security, the concept of global governance and global civil society, Asian’s view on Human Security, the practice of Human Security on the international level, and the disputes of Human Security. In the section about the relationship of Taiwan and Human Security, this thesis puts forward all kinds of threats that Taiwan faces, quoting the relevant concepts of human development index, and recommends Taiwan’s present development situation. It also introduces foreign policy and practice achievement of Canada and Japan which are based on Human Security view, with the hope that those can inspire the promotion and the impetus of Human Security in Taiwan.