Japan’s rearmament reshapes security in Southeast Asia

Japan's Rearmament Reshapes Security in Southeast Asia

Southeast Asian states must work together to shape Japan's rearmament for regional benefit, as Asia's security order is in flux.

From the South China Sea to the Taiwan Strait, Japan's dramatic shift in defence policy is reshaping Southeast Asia's strategic calculus. Japan's security identity is undergoing its most significant change since 1945, with the 2022 National Security Strategy aiming to double defence spending to 2% of GDP by 2027.

These developments show that Japan is prepared to reinterpret its postwar restraints for a harsher strategic environment.

Japan's rearmament is a significant shift that Southeast Asian states cannot afford to ignore.

Author's summary: Japan's rearmament impacts Southeast Asia's security.

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East Asia Forum East Asia Forum — 2025-10-25

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