Directed Energy Research in Japan

Japan's documented advancements in Directed Energy (DE) span decades of world-class academic laser physics and targeted defense procurement managed by the Acquisition, Technology & Logistics Agency (ATLA). Operating under the strategic oversight of the Japan Ministry of Defense (JMOD), Japanese programs focus heavily on counter-unmanned aerial system (C-UAS) lasers, High-Power Microwave (HPM) systems, and electromagnetic railguns. The nation's technical baseline originated within major academic centers of excellence, including the Institute of Laser Engineering at Osaka Univ. (ILE) and Nagaoka Univ.. Researchers like M. Yokoyama at Osaka University pioneered dense plasma focus diagnostics, while K. Yatsui at Nagaoka University of Technology developed critical expertise in pulsed power and particle beam technology. Inter-governmental collaboration dates back to efforts such as the US-Japan Joint Symposium on Compact Toruses in 1979, establishing an early foundation in advanced plasma confinement and energy transfer. Current operational defense initiatives are actively testing mobile directed energy assets, including a 10 kW truck-mounted laser system developed with Mitsubishi Heavy Industries for the Japan Ground Self-Defense Force (JGSDF), slated to complete testing by March 2026. Simultaneously, maritime high-energy laser trials are conducted aboard naval testbeds to secure domestic airspace against emerging drone swarms.