Japan Is Giving the United States a Chance in Asia

Foreign Affairs | David Sacks, Nick Snyder

Japan has doubled its defense budget and purchased long-range strike missiles capable of targeting military installations inside China and North Korea, marking a historic shift from post-World War II constitutional pacifism. Tokyo is active in regional defense. Prime Minister Sanae Takaichi's administration is lifting long-standing prohibitions on arms exports, stepping into direct combat roles during multilateral military exercises, and signing reciprocal access agreements to deploy military personnel overseas.

This rapid security expansion intentionally reinforces the U.S.-Japan alliance rather than seeking strategic autonomy for Tokyo. By expanding its operational footprint, the Japanese government seeks to strengthen collective deterrence across the Indo-Pacific region while maintaining full alignment with American security architecture. The Self-Defense Forces are actively integrating command structures with U.S. military forces to prepare for potential regional contingencies. However, Washington risks squandering this generational opportunity if American policymakers fail to capitalize on Tokyo's defense investments or match its operational momentum.

Comment

Tokyo's acquisition of stand-off counterstrike capabilities, including Tomahawk cruise missiles, fundamentally reconfigures the operational division of labour within the U.S.-Japan security treaty framework. Rather than acting strictly as a shield while American forces provide the strike sword, the Japan Self-Defense Forces are absorbing direct counter-offensive roles against regional air and naval installations. This operational evolution accelerates the bilateral transition toward synchronized joint command, requiring integrated command mechanisms akin to USFK in South Korea.

This integration mirrors the structural evolution of NATO's Allied Command Operations during the Cold War, where frontline allies moved from static territorial defence to integrated forward counter-strike planning. The introduction of long-range strike options into the Japanese inventory alters Beijing's calculation regarding the anti-access/area-denial envelope surrounding the First Island Chain. Consequently, mainland Chinese military facilities across Fujian and Zhejiang provinces face direct counter-battery risk from Japanese artillery and missile units.

Strategic Question for Discussion

If the integration of Tomahawk cruise missiles into the Japan Self-Defense Forces necessitates a unified command mechanism similar to USFK, which operational friction—targeting authority or sovereign rules of engagement—presents the greater hurdle to bilateral execution during a Taiwan Strait contingency?

The available evidence points toward targeting authority as the primary operational friction, given Tokyo's constitutional sensitivities surrounding pre-emptive strike authorization. While establishing a unified command framework akin to USFK solves tactical coordination, delegating fire-control decisions over Japanese Tomahawk cruise missiles during rapidly escalating crises will require unprecedented legal and political consensus between Washington and Tokyo.

Share your assessment in the comments below.

To read in details click here