| Summary: | 碩士 === 國防大學政治作戰學院 === 政治研究所 === 106 === After World War II ended in Japan’s defeat, under the leadership of the United States, Japan enacted the “Japanese Constitution” to replace the “Greater Japanese Empire Constitution,” and the constitution regulated that Japan has since implemented pacifism and firmly believed in becoming a peaceful nation. For more than 70 years now, only the Self-Defense Forces have maintained the basic self-defense capabilities of Japan, and they have not maintained the right to declare war and to fight. In the international transition and the impact of international trends, all countries can no longer rely solely on their own responsibility for safeguarding their own security, but they should also jointly assume international security obligations. In addition, Japan is currently facing the threat of the Chinese Communists’ armed forces, the nuclear issue on the Korean Peninsula, and Taiwan’s Diaoyutai sovereignty dispute and other regional security issues. After the Japanese Prime Minister Shinzo Abe took office for the second time, he actively led Japan’s reinforcement of the military as an attempt to change Japan’s security policy. In 2014, it amended the constitution’s interpretation to lift the right to collective self-defense, and in 2016, it officially lifted the ban.
After Japan regains the right to collective self-defense, it will inevitably use the right of collective self-defense to solve its current plight. This will affect the overall East Asian regional security. This study explores the evolution of the right to collective self-defense in Japan through literature analysis to understand why it lifted its ban on collective self-defense; furthermore, this study analyzes the impact of Japan’s application of its new “Security Act” under the U.S.-Japan cooperation framework in dealing with security issues in the region.
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