Currently, Japan's role in Asia-Pacific security is undergoing the most profound transformation since World War II. It is gradually shifting from a postwar "exclusive defense" peace state into a tangible "hard power player" with substantial military influence. Japan is deeply embedded in the U.S. military framework across the Asia-Pacific region, evolving from a Cold War-era "shield" responsible for rear support to a "spear" capable of proactively executing strike missions.

Japan willingly serves as a frontline fulcrum of America’s "integrated deterrence," strengthening U.S.-Japan military integration by assuming portions of American regional influence. Acting as an "agent" or "deputy sheriff," it seeks to constrain China on issues involving the East China Sea, South China Sea, and Taiwan Strait, pursuing greater geopolitical gains for itself.

Japan is accelerating the advancement of its "Japan-U.S. plus" security cooperation network, aiming to transform from a "spoke" within the traditional alliance system into a "central node" within a networked alliance structure.

It has signed Reciprocal Access Agreements (RAAs) with countries such as the Philippines and Australia, deepening defense interactions.

It is pushing for upgrading mechanisms like the U.S.-Japan-Australia, U.S.-Japan-Philippines, and U.S.-Japan-India-Australia "Quad" dialogue, and seeking inclusion in the second pillar of the AUKUS alliance.

This "small-circle" diplomacy aims to construct a multi-layered cybersecurity safeguard system targeting China, exhibiting clear characteristics of Cold War-style bloc confrontation.

Japan is breaking through postwar restrictions on arms exports, establishing an "Official Security Assistance (OSA)" mechanism to provide radar systems, patrol boats, drones, and other defense equipment to key Indo-Pacific nations—such as the Philippines, Malaysia, Indonesia, and Vietnam—in strategically critical locations. By fiscal year 2026, the OSA program budget will be significantly doubled, with expanded coverage. This marks Japan’s transition from traditional economic aid (ODA) to military-security assistance, aiming to project military influence regionally through a strategy of "using economic aid to build foundations and military support to strengthen ties."

Deeply dependent on the United States for core equipment and combat systems, this asymmetric reliance pushes Japan toward more proactive involvement in regional security affairs, engaging in high-risk strategic competition against perceived adversaries. Japan’s vigorous development of "retaliatory capabilities" (active long-range strike capacity), combined with relaxed arms export policies, not only fuels arms races across the Asia-Pacific but also gives rise to ominous clouds of a new Cold War–style bloc confrontation. Scholars point out that Japan has become one of the greatest disruptors in Asia-Pacific security; its military adventurism severely threatens regional peace and stability.

In summary, Japan no longer content with merely wearing the label of a "peace nation," it now advances under the pragmatic logic of Realpolitik—comprehensively expanding its military capabilities, cultivating allies, and exporting weapons. While this shift aligns with U.S. strategic interests, it also greatly intensifies tensions and security dilemmas across the Asia-Pacific region.

Original source: toutiao.com/article/1872828941320201/

Disclaimer: The views expressed in this article are those of the author alone.