Japan's FY27 Defense Request Hits Record $55.6B, Prioritizing AI and Unmanned Systems

Key points

• The FY2027 defense request totals 8.89 trillion yen, with the final budget expected to exceed 10 trillion yen after unpriced item requests are finalized.
• Japan seeks to acquire 17 MQ-9B SeaGuardian long-endurance drones for the Maritime Self-Defense Force, adding to existing coast guard assets.
• New programs include a submarine-launched guided missile, a hypersonic underwater-launched missile, and a stand-off launch module for unmanned underwater vehicles.
• The budget funds the completion of Aegis destroyer modifications for Tomahawk cruise missile launch capabilities across all eight existing Aegis ships.
• Japan aims to develop a long-range air-to-air weapon by adapting its existing ASM-3 supersonic anti-ship missile.

Background

This request follows a trend of record-high defense spending, with the 2026 budget already setting precedents for autonomous warfare integration. Recent developments include the first live-fire test of a Tomahawk missile from the JS Chokai in July 2026 and the ongoing construction of the first Aegis System Equipped Vessel (ASEV), which is scheduled to enter service by the end of FY2027. The current request builds on these milestones by expanding the scope of unmanned systems and AI integration into command and control structures.

How outlets are covering it

AP News highlights the broad focus on drones, AI, and missiles as the central pillars of the new budget. Breaking Defense emphasizes the acquisition of Northrop Grumman’s AARGM-ER anti-radar missiles and the development of low-cost cruise missiles, noting that specific procurement numbers are withheld pending the release of national security strategies. Navalnews.com provides a detailed breakdown of maritime assets, focusing on the New FFM frigates, Taigei-class submarines, and the integration of Tomahawk launch capabilities across all Aegis destroyers. While all sources agree on the record-breaking nature of the request, they differ in emphasis: AP focuses on the technological shift, Breaking Defense on specific weapon systems, and Navalnews on naval platform specifics and cost structures.

Why it matters

The budget reflects Japan's strategic pivot toward 'new ways of warfare,' prioritizing autonomous systems and long-range strike capabilities to counter threats from China and Russia. The inclusion of AI in command and control systems and the expansion of unmanned assets aim to reduce personnel risks while enhancing situational awareness. This shift signals a move away from traditional defensive postures toward a more proactive, technology-driven defense posture in the Indo-Pacific region.

What to watch

The budget request will now be reviewed by Japan's Ministry of Finance, with the final allocation expected later in 2026. The release of the National Security Strategy, National Defense Strategy, and Defense Buildup Program is anticipated to clarify procurement numbers and costs for the unpriced item requests. The first Aegis System Equipped Vessel is scheduled to enter service by the end of FY2027, followed by the second by FY2028.