Since 2013, The government of Japan has published several documents, focusing on national security, including National Security Strategy, National Defense Program Guidelines for FY2014 and Beyond, Mid-term Defense Buildup Plan, and the Three Principles on The Transfer of Defense Equipment and Technology. In order to meet the current national security environment, Japan and United States had revised the Guideline for Japan-U.S. Defense Cooperation in April 2014. In particular, Japanese Prime Minister Shinzō Abe and the ruling Liberal Democratic Party promoted the Bill for the Development of Legislation for Peace and Security, passed on September 19, 2015. The legislation reinterpreted the relevant passages to allow the Japan Self-Defense Force to operate overseas for collective self-defense for allies. The Government of Japan has adapted the Three Pillars of Foreign Policy, includes strengthening JP-U.S. Alliance, improving relationships with neighboring countries, and promoting economic revival, in order to achieve the Panoramic Perspective of the World Map to push forward foreign and defense strategies under the fundamental of Proactive Contribution to Peace. However, these measures have brought highly attentions and suspects from People Republic of China and Republic of Korea.
This study not only summarizes the changes of national security strategy, defense policy, and national difficulties in Japan before and after the approval of the first National Security Strategy but also discusses their impacts to Japanese internal and external affairs and countries in the Asia-Pacific region. This paper also provides feasible suggestions to Taiwan’s foreign policy to Japan. Japan’s national security perspective covers foreign affairs, military, economy, and environment, etc. After the approval of the National Security Strategy, Japan has continually revised foreign and defense policies primarily focusing on transforming Japan into a normal country, strengthening effectiveness of JP-US cooperation, responding the rise of Mainland China, and improving the role in the global stage. Concerning to the evolving global national security environment, adjustment of Japanese National Security Strategy, and no official relationship between Republic of China and Japan, Republic of China should build up a ROC-US-JP security triangle framework as a platform and seek the best national interests by deepening economic cooperation, civil exchanges, strengthening HA/DR cooperation, establishing unconventional security information exchanges, formulating specific and comprehensive policies and strategies.