Japan is pursuing stronger electronic warfare capabilities through a new collaboration with Northrop Grumman focused on building domestic expertise, improving data management, and advancing threat simulation technologies. The initiative aims to help Tokyo handle the full electronic warfare spectrum, including detecting hostile signals, exploiting enemy emissions, deception, denial, and protecting friendly forces. The effort comes amid growing security concerns in the Indo-Pacific, particularly tensions involving China, Taiwan, and the South China Sea. Northrop Grumman highlighted two systems that could support Japan’s objectives. The CEESIM Combat Electromagnetic Environment Simulator recreates dense electronic battlespaces with signals and threats arriving from multiple directions. It allows engineers and operators to test sensors and electronic warfare systems in controlled environments and military ranges. The system has supported numerous programs since entering service in 1983. The second system, Joint Threat Emitter, is a reactive training platform designed to help operators identify and counter missile and artillery threats. Together, these technologies could strengthen Japan’s readiness, accelerate local capability development, and improve training realism as the country expands defense investments in response to regional risks.
