Japan's Counterattack Capability and the Deployment of U.S. Military Typhoons: Reconstructing Deterrence in the First Island Chain

In March 2026, a special vehicle unit arrived at the Ground Self-Defense Force's Kengun Base in Kumamoto Prefecture under strict security. This was a convoy equipped with launchers for the improved Type 12 surface-to-ship guided missile. This deployment signifies that Japan has operationally deployed an attack capability with a range that significantly exceeds its own territory for the first time since World War II. This move symbolizes a fundamental shift in the strategic balance in the Indo-Pacific region.

The shift in Japan's defense policy originated from the revision of the National Security Strategy in 2022. This document formally introduced the concept of "counterstrike capability," allowing Japan to attack enemy military bases across borders in response to imminent or ongoing attacks. This fundamentally alters the traditional structure of the U.S.-Japan alliance. Historically, Japan has played the role of a defensive shield while the U.S. has provided the offensive spear. However, with the deployment of the improved Type 12 missile, which has a range of approximately 1,000 kilometers, this distinction is becoming increasingly blurred.

Developed by Mitsubishi Heavy Industries, this improved missile carries significance beyond mere technical enhancements. The prototype introduced in 2015 was primarily aimed at coastal defense, with a range of about 200 kilometers. The improved version, known as the Type 12 surface-to-ship guided missile extended range (SSM-ER), has been extensively redesigned. Engineers replaced the previous turbojet propulsion system with a more efficient turbofan engine, significantly extending the range while improving fuel efficiency.

Stealth characteristics have also been integrated into the missile's airframe. Angled surfaces reduce radar visibility, allowing the missile to fly low over the sea while evading detection by enemy air defense systems. These features make interception during the missile's approach phase significantly more difficult. This program reflects Japan's rapidly expanding defense budget. Tokyo has allocated approximately 177 billion yen (about 1.13 billion dollars) for the procurement of the improved system. This investment is part of a broader military expansion that has pushed Japan's defense spending for fiscal year 2026 to a historic high of around 9 trillion yen.

The missile is also evolving into a multi-platform system. Future variants designed for naval vessels and domestically produced Mitsubishi F-2 fighter aircraft are expected to enter service around 2027. At the same time, Japan is enhancing its information, surveillance, and reconnaissance capabilities through a new satellite network that can provide real-time targeting data. Despite these advancements, cooperation with the U.S. continues to play a central role. Information sharing and integrated targeting continue to support the broader deterrent framework of the alliance.

During the 2025 multinational military exercise "Talisman Sabre" in Australia, the improved Type 12 missile demonstrated complex terminal maneuvers designed to evade advanced naval defenses. Such capabilities make it a powerful tool for maritime denial operations along the first island chain from Kyushu to the Ryukyu Islands.

Japan's new missile capabilities have implications that extend far beyond its own territory. Tokyo recently revised long-standing restrictions on defense exports, opening the possibility for the transfer of advanced military systems to reliable partners. If widely implemented, the Type 12 missile could become part of a dispersed coastal missile defense network throughout the Indo-Pacific.

Australia is considering this system as a complement or alternative to U.S. missile programs. With an estimated cost of about 3 million dollars per unit, the long range and pricing of Japan's system are seen as suitable for defending vast maritime approaches. Interest has also been reported in Southeast Asia, with both the Philippines and Vietnam, which are directly involved in maritime disputes in the South China Sea, expressing interest through Japan's Official Security Assistance (OSA) framework.

For Manila, such a system could significantly enhance defense around the Luzon Strait, a crucial maritime corridor connecting the Pacific Ocean and the South China Sea. Deploying coastal missiles there would complicate China's attempts to project naval power through the region. If multiple countries adopt these systems simultaneously, they could form what analysts refer to as a "regional missile wall." In practice, such a network would allow participating countries to share surveillance data and coordinate targeting, raising the strategic costs of maritime aggression.

For countries like Indonesia, Japan's expanding military role presents both opportunities and dilemmas. A stronger Japanese security presence could help maintain balance in an increasingly competitive region. However, it could also accelerate regional arms races as countries seek to expand their own long-range strike capabilities.

Meanwhile, the U.S. welcomes Japan's capability expansion. Within Washington's broader integrated deterrence strategy, a stronger Japan is seen as key to maintaining regional balance against China. In this context, the deployment of the U.S. Army's Typhon Medium-Range Capability (MRC) system takes on even greater significance.

The Typhon MRC is a mobile ground-based missile launch system developed by Lockheed Martin. This system reintroduces ground-launched medium-range strike capabilities following the collapse of the Intermediate-Range Nuclear Forces Treaty. Typhon can launch several different missile types, including the SM-6 missile, Block IV Tactical Tomahawk cruise missile, and the new Precision Strike Missile (PrSM). Each missile offers different operational capabilities, and the Typhon battery can target naval vessels at sea, aerial threats, ground infrastructure, and logistics hubs.

One of the most important features of Typhon is its range. Reports indicate that Typhon batteries can strike targets up to 1,200 miles (about 1,900 kilometers) away. Strategically, this is significant. A Typhon deployed from northern Philippines or Japan's Iwakuni base would mean coverage over much of the South China Sea and surrounding waters. In practice, ground-based mobile launchers could threaten Chinese vessels operating hundreds of miles away. This creates a powerful deterrent effect in contested maritime areas.

One of Typhon's most important capabilities is its ability to launch ground-based variants of the Tomahawk cruise missile. The Block IV Tactical Tomahawk has a range of about 900 miles (approximately 1,450 kilometers) and flies at subsonic speeds of around 500 miles per hour (about 800 kilometers per hour). With a bidirectional data link, the Tomahawk can loiter in flight and be retargeted. New variants of the Tomahawk can also track moving maritime targets, making them useful for anti-ship missions. Thus, ground-launched Tomahawks provide the Army with the ability to strike ships, radar sites, command centers, and logistics hubs from outside enemy defensive zones.

Traditionally, long-range strike missions in the Pacific have been the responsibility of naval surface ships and submarines. However, with ground-based missile batteries, the Army can share the burden of long-range strikes, allowing the Navy to focus on maritime maneuver and fleet defense. Another significant advantage of Typhon is its mobility. Unlike fixed missile bases, Typhon launchers can move frequently. The advantages are clear. Mobility makes it difficult for enemy forces to detect or target the platforms in a preemptive strike. During conflicts, these Typhon systems could move between launch points, creating a persistent yet unpredictable threat of attack.

The deployment of Typhon aims to enhance deterrence against China's growing military capabilities. China has invested heavily in anti-ship ballistic missiles, long-range cruise missiles, and a rapidly expanding navy. China's extensive anti-access/area denial (A2/AD) network complicates U.S. incursions. As a result, U.S. planners are attempting to counter Chinese pressure by dispersing missile forces. Rather than relying solely on ships and aircraft, the U.S. aims to distribute strike capabilities across islands and coastal locations throughout the region. By complicating Chinese targeting, this approach enhances the resilience and lethality of U.S. forces.

Strategically, Typhon changes the calculus of regional deterrence. It enables a shift away from a deterrent strategy that relies solely on aircraft carriers, submarines, and long-range bombers. The U.S. can now deploy ground-based missile forces across the territories of its allies. These systems create additional attack vectors that adversarial forces must consider. In wartime, Typhon could help suppress enemy air defenses, attack naval forces, or strike command infrastructure.

China has reacted fiercely to the expansion of Japan's missile capabilities. Chinese officials argue that Tokyo's growing offensive capabilities revive elements of militarism thought to have been buried after World War II. Beijing has responded with both political criticism and economic pressure. In early 2026, China strengthened export controls on several dual-use materials essential for advanced defense manufacturing. The restrictions require special licenses for items that could support military production abroad, widely interpreted as an attempt to delay Japan's missile development.

China may also seek to dissuade Southeast Asian countries from purchasing Japanese systems, portraying such transactions as destabilizing to regional security. At the same time, military signaling has intensified. Chinese naval activities have increased near Iwo Jima and the Nansei Islands, underscoring the strategic importance of these maritime areas in the western Pacific.

The deployment of the improved Type 12 missile reflects changes in the geopolitical landscape of Asia. Japan is no longer content to play a passive role amid intensifying strategic competition. By developing long-range missile technology and expanding security partnerships, Tokyo is gradually weaving a broader deterrent network across the Indo-Pacific. This movement has the potential to reshape the regional power balance for decades to come.