Taiwan’s top security agency has disclosed that Japan and the Philippines are significantly increasing the deployment of land-based anti-ship missiles in strategic proximity to the Chinese coast. According to a report by Newsweek detailing a briefing by Taiwan’s National Security Bureau (NSB) to the Legislative Yuan, these maneuvers are intended to establish a “common deterrence” posture. The Central News Agency (CNA) reported that the NSB views the East China Sea, South China Sea, and Taiwan Strait as increasingly linked in a single strategic theater, prompted by China’s continued military expansion and maritime assertiveness.

Missile Systems and Strategic Basing

The current realignment involves the deployment of advanced precision-strike systems at key points along the First Island Chain. Per the NSB disclosures reported by Newsweek:

• Mid-Range Capability (MRC) / Typhon System: This U.S. Army system was deployed to the Philippines’ Zambales province in April 2024 and Japan’s Yamaguchi Prefecture in September 2025 for joint exercises. The system is capable of launching Standard Missile-6 (SM-6) interceptors and Tomahawk cruise missiles, providing allied forces with a flexible, ground-based strike option.
• NMESIS (Navy-Marine Expeditionary Ship Interdiction System): This mobile platform was transported to the Batanes province in the Philippines and subsequently relocated to Japan’s Okinawa Prefecture for U.S. Marine Corps training. The system utilizes the Naval Strike Missile (NSM) to enhance shore-to-ship defense.
• BrahMos Supersonic Cruise Missiles: The Philippine Department of National Defense has acquired the first two of three contracted batches of this system, developed jointly by India and Russia. Deployment is intended for Western Luzon and Palawan to monitor activities in the South China Sea.
• Hypersonic Glide Vehicles (HVGP): The Japan Ministry of Defense has advanced its timeline for testing and deploying HVGPs, with plans to station them on the islands of Kyushu and Hokkaido to strengthen its perimeter defense.

Strategic Linkage and the First Island Chain

The deployment of these assets reflects a coordinated effort to reinforce the “First Island Chain,” a critical line of maritime territory stretching from the Japanese archipelago to the Philippines. The U.S. Department of Defense considers this chain essential for managing regional security and balancing the capabilities of the People’s Liberation Army Navy (PLAN), the world’s largest naval force by vessel count.

By positioning mobile missile batteries in the Batanes and Okinawa, allies are targeting the Bashi Channel and the Miyako Strait. These chokepoints are the primary transit routes for Chinese naval vessels entering the Western Pacific. As noted in the CNA report, the NSB emphasizes that these deployments are part of a broader “will for common deterrence,” as regional partners increasingly sign mutual security agreements to counter Beijing’s territorial claims in contested waters.

Deterrence and Escalation Risks

While the introduction of land-based anti-ship systems is designed to prevent conflict by raising the cost of maritime aggression, it introduces several strategic risks. A report from the U.S. Congressional Research Service (CRS) characterized the deployment of Mid-Range Capability batteries as potentially “destabilizing,” noting that such actions could lead to a regional arms race.

Key Analytical Observations:

1. Chinese Response: Foreign Ministry spokesperson Lin Jian has formally denounced the deployment of the Typhon system in the Philippines as “provocative and dangerous.” Beijing maintains that these systems threaten regional stability and violate the security interests of neighboring nations.
2. Technological Parity: While Japan is accelerating its hypersonic program, Pentagon officials have expressed concern regarding China’s established lead in hypersonic weapon development and deployment.
3. Regional Stability: The NSB suggests that the strategic linkage of the East and South China Seas necessitates a unified allied front. However, the efficacy of this “common deterrence” depends on continued political alignment between Washington, Manila, and Tokyo, as well as the ability to manage the risk of tactical miscalculations in highly congested maritime corridors.