Hiding in Plain Sight? Japan’s Militarization of Space and Challenges to the Yoshida Doctrine

ABSTRACT Japan’s security discourse – despite accelerating shifts in its security stance over the last two decades, and more recently, under the Abe administration – remains dominated by views of essential continuity and maintenance of the “Yoshida Doctrine.” The case of Japan’s militarization of space is used to create a framework for systematically dismantling default assumptions about the durability of the Yoshida Doctrine. The militarization of space serves as a driver of broader trends in Japan’s security policy manifested in the procurement of dual-use assets in launch systems, communications and intelligence satellites, and counterspace capabilities necessary for active internal and external balancing with the US–Japan alliance; the strengthening domestically of security policymaking institutions; and the jettisoning of anti-militaristic norms. Japan’s increasingly assertive military stance, bolstering of the US–Japan alliance and cessation of hedging, facing down of China’s rise, and departure from the Yoshida Doctrine as grand strategy are thus revealed as hiding in plain sight.