Japan\u2019s successful Tomahawk and Upgraded Type-12 tests mark a decisive shift beyond interception-only defense toward a more assertive counterstrike posture.<\/p>\n
Last month, multiple media<\/a> outlets<\/a> reported that Japan\u2019s Defense Ministry significantly expanded its long-range strike capabilities by conducting two milestone tests of standoff missile systems aimed at strengthening deterrence in the Indo-Pacific.<\/p>\n In late July, the Japan Maritime Self-Defense Force, supported by the US Navy, launched a Tomahawk land-attack cruise missile from the Kongo-class Aegis destroyer JS Chokai in the Pacific, making Japan the third foreign country to launch the weapon from a surface warship.<\/p>\n At Gifu Air Base, the Japan Air Self-Defense Force (JASDF) also began flight testing an F-2 fighter equipped with the air-launched Upgraded Type-12 Surface-to-Ship Missile. The test supports Japan\u2019s broader effort to field low-observable, networked standoff weapons, including systems designed to strike targets at ranges of up to 1,600 kilometers.<\/p>\n Japan is procuring 400 US Tomahawk missiles as an interim capability while developing indigenous standoff missiles for deployment by fiscal year 2027, seeking to deter China without formally abandoning its exclusively defense-oriented posture.<\/p>\n Yet Japan\u2019s rapidly expanding missile reach is running ahead of the targeting networks, stockpiles, alliance arrangements and legal doctrine needed to employ those weapons credibly.<\/p>\n In a March 2026 International Institute for Strategic Studies (IISS) report<\/a>, Rupert Schulenburg places new standoff weapons within a broader strike architecture, arguing that ship-launched Tomahawks would give Japan a naval capability for deep precision strikes.<\/p>\n He adds that the Upgraded Type-12 missile, with a reported range of at least 900 kilometers, will substantially expand the Japan Self-Defense Forces\u2019 (JSDF) maritime-strike reach compared to existing systems like the ground force\u2019s 200-kilometer Type-12 and the air force\u2019s 180-kilometer ASM-2.<\/p>\n Operationally, Japan still lacks an independent kill chain capable of finding and tracking targets, launching strikes and assessing damage, according to a December 2025 International Crisis Group (ICG) report<\/a>. It remains dependent on US capabilities across those functions.<\/p>\n That dependence also leaves Japan\u2019s counterstrike force vulnerable to alliance friction and Chinese disruption, Kaitlyn Early and Carl Rehberg argue<\/a> in a 2026 Helms School of Government conference paper.<\/p>\n They argue that Japanese missiles become credible only when the US synchronizes intelligence, surveillance, and reconnaissance (ISR), planning and targeting within a unified denial posture; otherwise, they appear fragmented and exert less influence on China.<\/p>\n Mixed US signaling, force-posture gaps and incomplete integration further weaken that credibility, particularly in a Taiwan contingency where compressed timelines would leave little room for delayed intelligence, political hesitation or disrupted command networks.<\/p>\n The logistics picture is equally problematic. Masashi Murano and William Chou argue in a June 2026 Hudson Institute report<\/a> that Japan\u2019s munitions industry lacks scale, relies on fragile supply chains and remains dependent on foreign components and allocation decisions.<\/p>\n Tomahawk deliveries are particularly exposed: US production increases will take years, while active wars and global demand intensify competition for scarce munitions. Murano and Chou cite lead times of up to 47 months for the missile.<\/p>\n Japan has also prioritized expensive platforms \u2014 including F-35 fighters, upgraded F-15s and Aegis-equipped vessels \u2014 over sufficient stocks of missiles and interceptors, leaving its inventories and industrial capacity ill-prepared for sustained, high-intensity combat.<\/p>\n The doctrinal problem is how to strengthen deterrence without destabilizing the alliance arrangements that have long governed Japan\u2019s use of force.<\/p>\n Satoru Mori and Shinichi Kitaoka argue in a 2022 RAND report<\/a> that China\u2019s growing missile capacity and saturation tactics make relying solely on ballistic missile interception inadequate for Japan\u2019s defense. <\/p>\n They propose adding a limited counterstrike capability \u2014 conducted as a proportional, retaliatory measure after being attacked first \u2014 targeting fixed coastal military infrastructure such as air bases, naval ports, logistics hubs, radar sites and command headquarters.<\/p>\n In the same report, Jeffrey Hornung analyzes the operational implications for the alliance, noting that the allies are \u201cwoefully behind the curve\u201d on bilateral planning. <\/p>\n He stresses that integrating long-range fires will require deep synchronization across joint targeting, command-and-control structures, C4ISR hardware dependencies, and active\/passive force protection for Japanese launch sites.<\/p>\n