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Japan joins AUKUS: motivations, progress, and impact


Tianping Che

vol. XIII (1)

Pages 22-43


Abstract: Since its establishment, the AUKUS defense system has encountered significant

developmental challenges, primarily due to insufficient internal driving forces, which has

created a strategic opportunity for Japan to join AUKUS. Japan seeks to enhance its own

defense capabilities, deepen the Japan-U.S. alliance, and define its role in the Indo-

Pacific strategy, while also aiming to form close ties with allies in high-tech fields. The

U.S. and UK support Japan’s entry into AUKUS and expect to expand the alliance

through strategic interaction and technological alliances. However, Australia,

considering factors such as geopolitical strategy, institutional construction, and domestic

politics, has shown a cautious attitude. Japan’s joining of AUKUS will impact the

security structure of the Indo-Pacific region, potentially intensify the regional arms race,

and jeopardize the surrounding environment for China’s development.

Keywords: AUKUS Alliance Expansion; U.S.-Japan Alliance Strengthening; Technological Cooperation; Regional Security Dynamics; Attitudes of AUKUS Members.



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