Full Breakdown
U.S.-Japan Keen Sword 27 Exercises Mark First Deployments of Advanced Missiles
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Overview of the Exercise
The biannual Keen Sword 27 drills, described as the largest joint U.S.–Japan training to date, have begun this week. Roughly 45,000 Japan Self-Defense Force personnel and 12,000 U.S. service members are participating in a series of maneuvers intended to rehearse the defense of Japan’s southwestern island chain.
New Missile Deployments
For the first time, Japan will operate its longer-range Type 25 surface-to-ship missiles from a location outside their home base in Kumamoto Prefecture. The United States, in turn, is positioning an advanced anti-ship missile system on Yonaguni Island in Okinawa Prefecture, an outpost situated about 110 kilometers from Taiwan.
Strategic Context
The exercises serve as a dress rehearsal for a coordinated response to potential threats in the East China Sea and surrounding waters. Deploying missiles to Yonaguni places a U.S. system within striking distance of the Taiwan Strait, underscoring the alliance’s focus on deterring aggression near the flash-point region.
Expected Outcomes and Significance
Analysts view the expanded missile placements as a signal of heightened readiness and interoperability between the two forces. By testing long-range strike capabilities beyond traditional bases, the drills aim to improve rapid response options for defending the island chain and to demonstrate a unified stance against any escalation in the area.