Este trabalho tem o objetivo de observar as alterações da Doutrina Yoshida como norteadora do posicionamento internacional do Japão no início do século XXI. Para isso, abordaremos a relevância que o Leste Asiático tem para a delimitação das ameaças e como a lógica regional influencia diretamente a atuação do país, principalmente quanto aos temas de segurança. Utilizar-se-á a teoria dos complexos regionais de segurança para compreender a forma de inserção internacional do Japão, bem como embasar o aspecto de instabilidade que levaram às alterações da Doutrina Yoshida. Dentre as principais ameaças ao país, destacamos a relação sino-japonesa e as disputas nas gray zones, bem como a nuclearização norte-coreana. A aliança com os EUA e outros países do entorno regional também serão analisadas a fim de corroborar com a atuação internacional do Japão. Abordaremos também como a criação da Estratégia Nacional de Segurança japonesa e o pacifismo proativo complementam os fundamentos da Doutrina Yoshida na manutenção dos interesses nacionais do país perante as crescentes instabilidades do entorno asiático. / This paper aims to observe the changes of the Yoshida Doctrine as the guideline of Japans international performance in the beginning of the 21st century. In order to do it, we will focus on the threats of East Asia region as well as the relevance of the regional logic and how it directly influences the country\'s performance, especially regarding security issues. The theory of regional security complexes is used to understand Japan\'s international insertion, as well as to base the instability aspect that led to the changes in the Yoshida Doctrine. Among the main threats to the country, we highlight the Sino-Japanese relationship and the disputes in the gray zones, besides the North Korean nuclear program. The US alliance, as other regional countries alliances will also be analyzed in order to corroborate with the international performance of Japan. We will also address how the creation of the Japanese National Security Strategy and proactive pacifism complement the fundamentals principles of the Yoshida Doctrine in order to maintain the countrys interests in the growing instability of the Asian environment.

Este trabalho tem o objetivo de observar as alterações da Doutrina Yoshida como norteadora do posicionamento internacional do Japão no início do século XXI. Para isso, abordaremos a relevância que o Leste Asiático tem para a delimitação das ameaças e como a lógica regional influencia diretamente a atuação do país, principalmente quanto aos temas de segurança. Utilizar-se-á a teoria dos complexos regionais de segurança para compreender a forma de inserção internacional do Japão, bem como embasar o aspecto de instabilidade que levaram às alterações da Doutrina Yoshida. Dentre as principais ameaças ao país, destacamos a relação sino-japonesa e as disputas nas gray zones, bem como a nuclearização norte-coreana. A aliança com os EUA e outros países do entorno regional também serão analisadas a fim de corroborar com a atuação internacional do Japão. Abordaremos também como a criação da Estratégia Nacional de Segurança japonesa e o pacifismo proativo complementam os fundamentos da Doutrina Yoshida na manutenção dos interesses nacionais do país perante as crescentes instabilidades do entorno asiático. / This paper aims to observe the changes of the Yoshida Doctrine as the guideline of Japans international performance in the beginning of the 21st century. In order to do it, we will focus on the threats of East Asia region as well as the relevance of the regional logic and how it directly influences the country\'s performance, especially regarding security issues. The theory of regional security complexes is used to understand Japan\'s international insertion, as well as to base the instability aspect that led to the changes in the Yoshida Doctrine. Among the main threats to the country, we highlight the Sino-Japanese relationship and the disputes in the gray zones, besides the North Korean nuclear program. The US alliance, as other regional countries alliances will also be analyzed in order to corroborate with the international performance of Japan. We will also address how the creation of the Japanese National Security Strategy and proactive pacifism complement the fundamentals principles of the Yoshida Doctrine in order to maintain the countrys interests in the growing instability of the Asian environment.

戰後日本對華政策之研究（一九四九∼一九九七） 　　本論文之研究方法 主要係利用傳統的歷史研究方法為主，採直敘的方式，在戰後各時期日本所面對的國際政治局勢與外交政策中，依序選擇重點作經驗性的探討與分析。而由於在人文社會科學的研究中，任何假設與立論的基礎便是材料。故在研究方法上，筆者採「非實驗性的方法」中之文件分析法。 是故，本研究基本上屬於「描述性研究」，筆者乃以日本的「中國政策」為對象，對戰後以來各個時期之對華政策形成，尋求精確的描述與解釋。再者，於研究途徑的選擇方面，本研究係採「系統理論」作為主要的研究分析途徑。基於此，在研究架構上，筆者將針對戰後日本之「中國政策」選擇重點，依序進行經驗性的探討，詳細敘述戰後以來日本各內閣的成立，與每一任內閣所面對的國內、外環境及在內外環境交互作用下，日本政府如何在其「中國政策」中作出反應，並希望在其間發現日本對華政策之特質。 此外，在日本研究中，政治文化的因素亦為研究者所重視，因此，筆者在研究中，亦自政治文化的分析角度切入，具體地分析日本的諸多文化現象對其「中國政策」的影響。 / The Research on Japan's China Policy after the World War II The research method used in this dissertation is mainly based on the traditionalhistorical research method. Some of the improtant statements on the internationalpolitical status and diplomatic policies, which Japan weere facing after the world War II, have been selected on a time basis. The selected statements are studied andanalyzed experientially. When doing the human and social science studies, the foundation of hypothesis can be considered as the researching material itself. Therefore, the descriptive study used in the non-experimental method is adapted as the research method in this dissertation. The research presented in this dissertation is a descriptive study. Japan'sChina policy are the research subjects. The forming of Japan's post-war Chinapolicy at different stages is studeied in depths, hoping to seek for explanationsfrom the detailed statements given in the disseration. Regarding to the theory of research, system theory is adapted as main researchingand analyzing basis in this dissertation. The research framework is based on some of important Japan's post-war China policy. Detailed descriptions on the formation of Japanese cabinets after the War are given. Also, how the Japanesegovernment reacted on her China policy. when facing the interactions between Japanese domestic and international situations, are sequentially and experientially studied. This is aimed at finding the characteristics of Japan's China policy. Besides, in the studied of Japan researchers have been considering the elementsof political culture. In this dissertation, therefore, analyses are done, from the viewpoint of political culture, on some of Japanese cultures' impacts uponher China policy.