Japan's Defense Ministry Puts Drone-Mounted Quantum Magnetometers for Submarine Detection in Its Fiscal 2027 Budget Request, With Prototypes Planned for 2027 to 2031

Nikkei reports that Japan's Ministry of Defense wrote a quantum magnetometer for small drones into its fiscal 2027 budget request, with prototypes planned from 2027 to 2031 and Chinese submarines as the surveillance target. We read what the filing establishes for submarine detection from cheap, expendable aircraft, set it beside CASC's 2025 drone-mounted magnetometer trial off Weihai, and lay out what separates an item request from the anti-submarine warfare surveillance net a fleet commander can rely on.