Japan Deploys Type 25 Missiles as Long-Range Defense Shift Takes Shape

Two Bases Mark a New Stage in Japanese Defense

Japan put two domestically developed missile systems into operational service on March 31, 2026: the Type 25 Surface-to-Ship Guided Missile at Camp Kengun in Kumamoto Prefecture on Kyushu, and the Type 25 Hyper Velocity Gliding Projectile at Camp Fuji in Shizuoka Prefecture. The Japan Ground Self-Defense Force (JGSDF) announced the deployments, bringing weapons designed to strike at long distances into frontline service.

The systems represent Japan's first domestically developed long-range stand-off missiles, weapons that can attack from beyond visual range while keeping their launch platforms farther from enemy forces. Their arrival marks the most substantial change in Tokyo's military posture since the Self-Defense Forces were established in 1954, extending Japan's military reach across strategically important parts of the Indo-Pacific.

The Type 25 Surface-to-Ship Guided Missile (25SSM), previously called the Upgraded Type 12 Surface-to-Ship Missile, increases the earlier weapon's approximate range from 200 kilometers to 1,000 kilometers. That reach allows Japanese forces to target hostile ships and selected assets on land across the East China Sea, the approaches to the Taiwan Strait and potentially coastal areas of mainland China.

The JGSDF presented the deployment as a defensive measure. In its statement announcing the systems' entry into service, the force described their purpose and its responsibility to the public:

These equipment are important in enhancing Japan's deterrence and response capabilities. The Ground Self Defense Force will always stand with the people of Japan and will continue to make every effort to protect their safety and security.

The Type 25 name refers to fiscal year 2025, which ended on March 31, 2026, when the weapons received their formal designations under Japan's equipment naming convention. Both grew out of earlier development programs and have now become operational weapons assigned to frontline units responsible for defending Japan's southwestern islands.

How the Type 25 Extends Japan's Reach

The original Type 12 missile entered service in 2012. It combined inertial navigation, which tracks movement from a known starting point, with GPS guidance and a Ka-band Active Electronic Scanned Array radar seeker. The seeker uses electronically directed radar signals to find and track a target during the missile's approach.

The Type 25 SSM offers roughly five times the baseline weapon's range: about 1,000 kilometers compared with about 200 kilometers. Its redesigned shape also seeks to make it harder for enemy radar to detect. An asymmetrical nose cone and faceted body surfaces scatter radar signals, reducing the radar cross-section, the strength of the reflection a radar receives.

The missile introduces Update-to-Date Command (UTDC) functionality through satellite communications. Ground control stations can use those links to redirect a missile after launch, allowing it to respond to moving ships or newly identified threats instead of relying entirely on target coordinates entered beforehand.

That connection supports what military planners call a responsive kill chain: the sequence of finding a target, tracking it, deciding to attack and guiding a weapon toward it. Updating a missile during flight gives coastal defense units more flexibility when a ship changes course or the tactical situation changes.

Truck mounted Transporter-Erector-Launcher (TEL) platforms carry the Type 25 SSM. These vehicles transport the missiles, raise them into firing position and launch them. They can move along Japan's roads, use prepared hiding positions or relocate between southwestern islands, making their locations harder for an enemy to predict.

Japanese planners increasingly favor weapons that can keep operating after attacks on airfields and command centers. Modern conflicts have shown the vulnerability of fixed military infrastructure to precision missile strikes in the opening hours of fighting. Mobile launchers give Japan another way to preserve its ability to respond.

A Different Route to Hypersonic Flight

The Type 25 Hyper Velocity Gliding Projectile (25HGP), also referred to as the HVGP, follows a different flight pattern from the air breathing Type 25 SSM. A rocket booster sends a glide vehicle into the upper atmosphere, from where it descends toward its target at speeds exceeding Mach 5.

Mach 5 means five times the speed of sound and is the threshold commonly used to describe hypersonic flight. The HVGP combines that speed with maneuvering trajectories, making its final approach harder to predict than that of conventional ballistic or cruise missiles. Defensive radar systems consequently face a more difficult interception calculation.

The hypersonic technology program also uses a Dual-Mode Scramjet (DMSJ) engine combining ramjet and scramjet technologies. Conventional scramjets need to reach hypersonic speeds before operating, requiring large rocket boosters that add size and make launches more detectable. The DMSJ configuration uses ramjet mode for efficient flight between Mach 3 and Mach 5, then switches to scramjet mode above Mach 5, reducing booster requirements and total system mass.

Japan's Acquisition, Technology & Logistics Agency (ATLA) describes the hypersonic guided missile as capable of cruising at high altitude while maneuvering. Its flight envelope lies between the areas typically covered by defenses against low flying aircraft and missiles and those covered by defenses against ballistic missiles at higher altitudes.

ATLA has described that capability as a "game changer" for island defense, particularly against hardened targets such as aircraft carriers or fortified command facilities. Constant changes in flight path make the point at which a defensive interceptor must meet the weapon harder to calculate.

Future HVGP variants are intended to increase range from several hundred kilometers to approximately 2,000 or 3,000 kilometers, potentially bringing targets deep within continental Asia within reach. The Ministry of Defense also plans deployments at Camp Kamifurano in Hokkaido and Camp Ebino in Miyazaki, building a nationwide network of mobile batteries covering several strategic approaches.

The Rules Behind Counterstrike Capabilities

Japan's December 2022 adoption of its Three Security Documents laid the policy foundation for the March 2026 deployments. The National Security Strategy, National Defense Strategy and Defense Buildup Program explicitly endorsed counterstrike capabilities for the first time in Japan's history since World War II.

The concept, also described as stand-off defense capability, allows Japan to engage invading forces at extended distances before they approach or land on Japanese territory. It also gives Tokyo the ability to threaten missile launch sites and invasion staging areas in potential adversaries' territory.

Article 9 of Japan's constitution has historically restricted military doctrine to exclusively defensive operations, ruling out power projection capabilities that could enable preemptive strikes. Weapons with the reach of the Type 25 cross a capability threshold that Tokyo deliberately avoided for decades.

The 2022 framework sets three strict conditions for counterstrike use: an armed attack against Japan must be imminent or already underway, no alternative means must exist to halt the aggression, and force must be limited to the minimum necessary. Japan's position is that attacks on enemy missile bases remain defensive when they respond to ongoing or inevitable attacks.

The policy also changes the division of responsibilities within the alliance with the United States. Washington remains committed to defending Japan against missile attacks, but American forces must prioritize protecting U.S. territory when both countries face simultaneous threats.

Japanese counterstrike capabilities would allow Tokyo to take greater responsibility for suppressing missile threats aimed at the archipelago. That could reduce the competing demands on U.S. commanders during conflicts in several theaters. The argument for sharing those responsibilities has gained support in Washington as the United States seeks a broader distribution of security duties across the Indo-Pacific.

Why the Southwestern Islands Matter

Japanese defense officials describe the country's security environment as the most severe since World War II. Tokyo's accelerated deployment schedule reflects its assessment that regional conditions have worsened to the point where further development delays are unacceptable.

Chinese naval and air forces operate with increasing frequency around the Ryukyu island chain, which runs from Kyushu toward Taiwan and includes the disputed Senkaku Islands. China's military modernization has produced advanced destroyers, aircraft carriers and amphibious assault ships capable of projecting power across the East China Sea.

Chinese missile forces also maintain pressure through exercises and deployments directed at the first island chain. Japan's new mobile weapons add reach to its defense of the islands and the sea routes surrounding them.

North Korea's expanding nuclear and ballistic missile programs present another threat. Japan relies on Patriot PAC-3 systems and interceptors aboard Aegis destroyers to defend against incoming missiles, but defense officials increasingly argue that interception alone cannot guarantee protection against large missile salvos.

Counterstrike capability adds the option of threatening launch sites rather than trying to intercept every incoming weapon. That approach places greater weight on identifying the origin of an attack and stopping further launches.

Taiwan is central to these calculations. The Nansei island chain lies along the maritime corridor Chinese naval forces would likely use during a major operation against Taiwan. Japan could therefore be drawn into a conflict regardless of Tokyo's direct intentions.

Missiles at Camp Kengun can threaten Chinese warships and amphibious formations in those approaches. Their mobility and longer range introduce uncertainty into Beijing's planning about whether Japanese missile units would survive an attack and retain the ability to retaliate.

China's Response and Concern in Kumamoto

A Chinese naval fleet entered the Sea of Japan as the Type 25 systems entered service, signaling Beijing's displeasure through a military presence. Chinese officials also challenged Tokyo's explanation that the weapons serve a defensive purpose.

Chinese Defense Ministry officials described the deployment in language that linked it to Japan's military history and warned of damage to regional security:

neo-militarism in Japan, which has become more than just a perilous tendency but a very real threat that may wreak havoc on regional peace and security.

Chinese Foreign Ministry spokeswoman Mao Ning said the move exceeded the scope of self-defense. She accused Tokyo of deploying offensive weapons under the guise of "defensive counterstrike."

Residents around Camp Kengun have also protested, arguing that the presence of weapons capable of long distance strikes could make their region a primary target during a future conflict. Critics say the government moved the batteries into position without sufficient consultation with the community.

The Kumamoto protests expose a practical tension between national security decisions and local autonomy. The government's effort to increase deterrence, discouraging an attack by raising its expected cost, brings communities near missile bases into the debate about the risks of that strategy.

Ships, Aircraft and American Tomahawks

The ground deployments are the first stage of a missile architecture spanning land, sea and air that Japan plans to complete by 2032. Tokyo intends to introduce versions of the Type 25 SSM launched from ships and aircraft during fiscal year 2027, providing several ways to conduct strikes if one platform becomes unavailable.

The naval version is scheduled for the Japan Maritime Self-Defense Force destroyer JS Teruzuki, based at Yokosuka. The aircraft version is planned for upgraded F-2 fighters operating from Hyakuri Air Base in Ibaraki Prefecture.

Japan is also buying American weapons to bring long-range strike capability into service while its domestic systems mature. In January 2024, Tokyo finalized the purchase of 400 BGM-109 Tomahawk Land Attack Missiles for deployment aboard destroyers equipped with Aegis systems.

The first Japanese warship equipped with Tomahawks completed crew training and system integration in March 2026. The development was covered in the linked missile deployment report. Tomahawks and Type 25 missiles together create a layered stand-off network, with weapons suited to different targets, ranges and defensive conditions.

Washington has also provided technical assistance for Japan's hypersonic program. The U.S. State Department approved approximately $340 million in Foreign Military Sale support for HVGP development, including preparation for tests, transportation and support at testing ranges.

Japanese engineers conducted multiple launches at Vandenberg Space Force Base in California during 2024 and 2025. Using American facilities provided testing infrastructure while avoiding surveillance by regional adversaries that monitor Japanese domestic ranges.

The cooperation is part of broader American efforts to strengthen precision strike capabilities at long distances across the first island chain. Those efforts include similar positioning of weapons in the Philippines.

From Development to Production

Japan is developing a New Surface-to-Ship / Surface-to-Surface Precision-Guided Missile beyond the Type 25 family, with deployment intended by 2032. The system is planned to have more capable guidance, including automated target classification and the ability to select specific vulnerable points on an enemy vessel.

Those planned functions resemble capabilities of the U.S. AGM-158C LRASM. ATLA has declined to disclose precise performance characteristics, citing concerns about protecting operational information on Self-Defense Forces capabilities.

The fiscal year 2026 budget allocates ¥73.2 billion for continued hypersonic missile development and ¥30.1 billion for initial procurement toward full-scale production. The procurement funding indicates that milestones required for manufacturing readiness have been achieved, moving the program beyond experimentation toward serial production.

The spending supports Japan's broader commitment to raise defense expenditure to 2% of gross domestic product, reaching investment levels equivalent to those used by NATO years ahead of the original targets.

Japan's logistics network must also adapt. Many ammunition depots remain concentrated in Hokkaido, reflecting the Cold War focus on threats from the Soviet Union. Supporting defense of the southern islands requires redistributing logistics infrastructure so missiles, supplies and maintenance can reach the units assigned there.

Intelligence, surveillance and reconnaissance (ISR) remain central to the new weapons' effectiveness. Hitting a moving ship or mobile missile launcher from 1,000 kilometers away requires persistent observation from aircraft and satellites, followed by timely delivery of targeting information.

Japan currently lacks sufficient independent capacity for that task and remains heavily dependent on American assets. Closer integration with U.S. command and control systems will be essential to operational effectiveness while Tokyo develops its own satellite constellations and sensor networks.

The Deployment Timeline

The March 31 fielding followed years of policy decisions, purchasing and testing. Further deployments are planned across additional bases and platforms, extending the program beyond the two ground systems now in service.

• 1954: Japan established the Self-Defense Forces.
• 2012: The original Type 12 Surface-to-Ship Missile entered service.
• December 2022: Japan adopted the National Security Strategy, National Defense Strategy and Defense Buildup Program, endorsing counterstrike capabilities.
• January 2024: Tokyo finalized its purchase of 400 American Tomahawk Land Attack Missiles.
• 2024 and 2025: Japanese engineers conducted multiple hypersonic test launches at Vandenberg Space Force Base.
• March 2026: The first Japanese warship equipped with Tomahawks completed training and system integration.
• March 31, 2026: The JGSDF deployed the Type 25 SSM at Camp Kengun and Type 25 HVGP at Camp Fuji, at the close of fiscal year 2025.
• Fiscal year 2027: Japan plans to introduce Type 25 SSM versions for JS Teruzuki and upgraded F-2 aircraft.
• 2032: Japan intends to complete its broader missile architecture and deploy the new precision guided missile.

No deployment dates were given for the planned HVGP batteries at Camp Kamifurano and Camp Ebino, or for future variants with ranges of approximately 2,000 or 3,000 kilometers.

Key Points

• Japan deployed two domestically developed long-range missile systems on March 31, 2026, at Camp Kengun and Camp Fuji.
• The Type 25 SSM has approximately 1,000 kilometers of range, reduced radar visibility and satellite links for redirection during flight.
• The Type 25 HVGP uses a rocket boosted glide vehicle traveling above Mach 5, with maneuvering designed to complicate interception.
• The deployments implement the counterstrike policy adopted in Japan's three security documents in December 2022.
• Japan is acquiring 400 Tomahawks and plans additional Type 25 launch platforms during fiscal year 2027.
• China condemns the deployments, while residents near Camp Kengun have raised concerns about becoming military targets.
• Production, ammunition distribution and reliable targeting information remain essential to putting the new capabilities into effective use.