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// DOSSIER — us-deploy-nmesis-anti-ship-missiles-yonaguni-taiwan
US to Deploy NMESIS Anti-Ship Missiles to Yonaguni Near Taiwan for Keen Sword 27
REL_TIME: 07 Oct 2026 23:12Z · LANG: EN
The US military, specifically the 12th Marine Littoral Regiment, is set to deploy the Navy-Marine Expeditionary Ship Interdiction System (NMESIS) to Japan's westernmost island, Yonaguni, for the first time during the biennial Keen Sword 27 exercise scheduled for October 19–29, 2026. Located just 68 miles (110 km) from Taiwan, this unprecedented deployment places mobile, land-based 'ship-killer' missiles within striking range of the Taiwan Strait. The exercise, which also features the Marine Air Defense Integrated System (MADIS) and Japanese surface-to-ship missile units, signals a strategic shift toward distributed operations along the First Island Chain to deter Chinese maritime activity and prepare for potential regional crises.
// Background
The deployment follows the 2022 establishment of the first Marine Littoral Regiment as part of the US Marine Corps' Force Design strategy. This strategy emphasizes 'Expeditionary Advanced Base Operations' (EABO), utilizing small, mobile units to deny sea access to adversaries. Yonaguni has hosted a Japanese Ground Self-Defense Force garrison since 2016, but the introduction of advanced US anti-ship and air-defense systems represents a significant hardening of the island's military posture.
// Key Developments
- First-ever deployment of the NMESIS anti-ship system to Yonaguni, the Japanese territory closest to Taiwan.
- The NMESIS system has a striking range of approximately 115 miles (185 km), covering critical maritime approaches to Taiwan.
- The deployment is a core component of 'Keen Sword 27,' a major joint US-Japanese exercise focused on island defense and sea denial.
- US Marines will also deploy MADIS (Marine Air Defense Integrated System) to provide short-range protection against drones and low-flying aircraft.
- China has signaled strong opposition, with experts warning of an increased risk of military miscalculation in the region.
// Timeline
-
The first US Marine Littoral Regiment is established to focus on China-related contingencies.
-
US Marines deploy NMESIS to the Philippines' Batanes Islands during Balikatan exercises.
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The Okinawa Defense Bureau officially discloses the plan to deploy NMESIS and MADIS to Yonaguni.
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Scheduled dates for the Keen Sword 27 joint military exercise across Japan's southern island chain.
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Japan's target date for the permanent stationing of surface-to-air missiles on Yonaguni.
// Perspectives
[United States & Japan]
Focused on strengthening 'denial defense' and deterrence along the First Island Chain through mobile, distributed littoral forces.
[China]
Views the deployment as a provocative escalation that threatens its territorial claims and regional stability.
[Yonaguni Residents]
Expressing concern and opposition to the continued militarization of the island, fearing it could become a target in a conflict.
// Quotes
“The deployment increases the risk of miscalculation between the US and China and Beijing may respond by conducting its own military drills in the area.”
“Japan's 2030 plan to permanently base surface-to-air missiles on Yonaguni would create regional tension and provoke military confrontation.”
“The idea was to create mobile Marine units equipped with anti-ship missiles and other weapons that can rapidly deploy along what is known as the First Island Chain.”
