Exclusive: Japan Deploys First Hypervelocity Gliding Projectile Missile Battalions to Protect Its Islands.

According to information published by the IIShomelander X account, on June 9, 2025, Japan has initiated the deployment of its cutting-edge Hyper Velocity Gliding Projectile (HVGP) system by establishing two specialized missile battalions in Kyushu and Hokkaido. Officially named “Island Defense High-Speed Sliding Missile Special Operations Battalions,” these units represent a pivotal evolution in Japan’s missile force structure and its broader deterrence strategy in the Indo-Pacific.
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Japanese military truck carrier equipped with the Hypervelocity Gliding Projectile (HGV) missile system, deployed to defend remote islands. (Picture source: IIShomelander  X account)

This deployment marks the first operational step in a three-phase program under the Japan Ground Self-Defense Force (JGSDF). The initial focus is on equipping forces with the BIOCK1 HVGP variant by 2026, providing an operational range between 500 and 900 kilometers. Further enhancements will follow with the integration of BIOCK2A and BIOCK2B during the 2030s, offering extended ranges of approximately 2,000 and 3,000 kilometers respectively, capable of deep-strike missions across the entire East Asia region.

Strategically positioned in Kyushu and Hokkaido, these battalions are designed to counter threats from both the East China Sea and the northern maritime approaches. Kyushu's deployment allows coverage of disputed areas such as the Senkaku Islands, while Hokkaido offers monitoring and deterrence potential toward the Sea of Okhotsk and Russia's Far East.

The HVGP (Hyper Velocity Gliding Projectile), despite its official label as a defensive "island protection" system, is widely regarded by defense analysts as Japan’s first de facto ballistic missile. It is engineered as a standoff weapon, specifically designed to strike enemy forces and bases from beyond the range of hostile air defenses or counterfire systems. Its mission profile reflects an evolution from static homeland defense toward proactive deterrence, in line with Japan's recently adopted "counterstrike capability" policy.

The HVGP is based on a hypersonic glide vehicle (HGV) design, allowing it to travel at speeds greater than Mach 5 while maneuvering within the upper atmosphere, making it significantly more difficult to track and intercept than conventional ballistic or cruise missiles. This profile allows it to bypass integrated air defense systems and engage high-value targets with extreme precision and minimal warning.

The system is mounted on a purpose-built 8x8 transporter-erector-launcher (TEL) vehicle. Based on visual analysis, the launcher platform is a heavily modified derivative of Japan’s Type 03 Chu-SAM system. It features a reinforced six-axle chassis with high mobility across varied terrain, an angular armored cabin for crew protection, and twin cylindrical launch canisters mounted at the rear. These canisters are designed for rapid deployment and vertical launch operations, with integrated hydraulics and onboard power systems providing operational autonomy.

Visible components include side-mounted communications equipment, external generator boxes, and control access panels, all of which support the missile's precision guidance and secure launch. This TEL design enables decentralized and mobile missile operations, reducing vulnerability to pre-emptive strikes and enhancing survivability in a contested battlespace.

The development and fielding of the HVGP are emblematic of Japan’s growing emphasis on advanced kinetic capabilities to deter and, if necessary, neutralize emerging regional threats. These include North Korean missile bases, Chinese naval task forces, and other critical military infrastructure within the East China Sea and broader Indo-Pacific. The missile's standoff capability ensures that Japan can maintain strategic reach without exposing its launch platforms to direct retaliation.

The HVGP system is a technological and doctrinal milestone, positioning Japan at the forefront of hypersonic missile deployment and signaling a shift in its postwar defense-only posture. With this development, Japan now fields a credible, mobile, and survivable precision strike asset that enhances both national security and alliance interoperability.