Japan and U.S. Launch Large Joint Military Exercises
The Keen Sword 27 drills involve 57,000 personnel and focus on the defense of Japan's remote southwestern islands.
Updated on Oct. 20, 2026 in Military
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Japanese and U.S. forces have commenced the biennial Keen Sword 27 military exercises alongside partners from seven other nations. The drills aim to bolster defense capabilities across Japan's southwestern islands and coastal waters.
Why it matters
These exercises address regional security concerns regarding tensions with China, North Korea, and Russia. By simulating complex defensive operations, the allies seek to protect Japanese territory and maintain regional stability.
The drills involve 45,000 Japanese troops and 12,000 American service members, representing a massive mobilization of forces. These personnel are testing advanced equipment including Type-25 land-to-ship missiles and mobile rocket launchers.
The players
Japan Self-Defense Forces
This is the unified military organization responsible for the national defense of Japan.
U.S. Military
The combined armed forces of the United States operate bases across Japan to support regional security agreements.
The details
Military personnel are conducting amphibious landings, air and missile defense operations, and mine sweeping across locations like Yonaguni and Ishigaki. Deployment of the Type-25 missile, which has a 1,000-kilometer range, highlights the focus on securing areas near the Japanese coastline.
Timeline
The exercises began on Oct. 19, 2026.
Operations are scheduled to conclude on Oct. 29, 2026.
Political Context
These exercises reflect the enduring bilateral security alliance established through the Keen Sword exercise series. This cooperation faces ongoing criticism from neighboring states who argue that such drills escalate regional geopolitical friction.
While the exercises are localized to remote islands, they signal a heightened state of military readiness across the region. Residents and regional stakeholders should expect increased naval and air activity near Oki-Daito and the southwestern island chain.
The takeaway
The Keen Sword 27 exercises demonstrate the commitment of international allies to securing strategic island territories through integrated defense technology. This level of coordination underscores the evolving tactical approach to maintaining stability in the Indo-Pacific.
What happens next
Live fire exercises are scheduled to take place on the uninhabited island of Oki-Daito before the conclusion of the drills on Oct. 29.
Further reading
Learn more about ongoing regional security efforts in the Military section.
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