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Paper short abstract

My paper examines how Japan’s energy vulnerabilities—particularly its dependence on Middle Eastern oil—acquired increasing significance as national security concerns, contributing to the gradual transformation of Japan’s security policy and strategic identity toward a more proactive security posture.

Paper long abstract

Japan has long depended heavily on imported energy, particularly oil from the Middle East. This dependence created a structural vulnerability, as political and security developments in the region could directly affect Japan’s economic stability and national interests. This paper examines two related questions: how did energy insecurity contribute to changes in Japan’s security identity, and how did Comprehensive Security evolve after the 1980s?

The paper argues that energy insecurity was an important, though not sufficient, driver of changes in Japan’s security identity. The 1973 oil crisis demonstrated that dependence on Middle Eastern energy could have consequences beyond the economic sphere. During the 1980s, the Iran–Iraq War and concerns over Persian Gulf oil supplies further connected energy vulnerability with regional stability and maritime routes. Over time, Japan increasingly understood the protection of energy supplies not simply as an economic issue, but as part of a broader national-security concern.

The paper further argues that Comprehensive Security gradually evolved from a broad but predominantly non-military approach into a wider framework encompassing international cooperation, maritime security, overseas engagement, economic resilience, and, more recently, military and multi-domain capabilities. The Gulf War, post-9/11 security challenges, Japan’s expanding maritime and overseas activities, and institutional reforms after 2015 contributed to this expansion. The 2022 National Security Strategy further institutionalized the links between energy security, economic resilience, supply-chain stability, maritime security, and national defense.

The study identifies a cumulative process in which energy insecurity broadened the meaning of what Japan needed to protect, while Comprehensive Security provided a framework for translating this broader understanding into changing security functions and policy instruments. At the same time, Article 9 and postwar pacifist norms continued to constrain Japan’s security role.

The paper concludes that Japan’s transformation should not be understood simply as a transition from pacifism to militarism. Rather, it represents a gradual redefinition of what security means for Japan and an expansion of the instruments used to protect its national interests. The Middle East provides an important context for observing this transformation of Japan’s security identity.

Keywords: Japan; Security Policy; Energy Security; Comprehensive Security; Pacifism; Middle East; Security Identity․