GIFU, JAPAN — March 17, 2026 : The Japan Air Self-Defense Force (JASDF) has conducted the first flight of its new Kawasaki EC-2 stand-off jammer (SOJ) electronic warfare aircraft, marking a key milestone in Japan’s effort to expand its airborne electromagnetic warfare capabilities. The flight took place at Gifu Air Base under the oversight of the JASDF Air Development and Test Command.
The EC-2, developed by Kawasaki Heavy Industries, is a dedicated electronic attack platform derived from the domestically produced C-2 military transport aircraft. The program is intended to replace the aging EC-1 electronic warfare aircraft, which has been in service since 1986 and was based on the earlier C-1 airframe.
Program Background and Development
Development of the EC-2 began around fiscal years 2020–2021 as part of Japan’s broader modernization of electromagnetic spectrum operations. The Japanese Ministry of Defense allocated approximately ¥41.4 billion for the program.
The aircraft undergoing testing is converted from the first production C-2 airframe (serial number 18-1203), which has been extensively modified to accommodate electronic warfare systems. The program remains in the testing and integration phase, with development scheduled for completion by the end of fiscal year 2026 (March 2027). Entry into operational service is planned for fiscal year 2027.
The JASDF intends to procure a total of four EC-2 aircraft. Once operational, they are expected to be assigned to the Electronic Warfare Operations Group (Denshi Sakusengun) based at Iruma Air Base.
Stand-Off Jamming Role and Operational Concept
The EC-2 is designed to perform stand-off electronic attack missions, operating outside the engagement range of enemy surface-to-air missile (SAM) systems. This approach allows the aircraft to disrupt adversary systems without entering contested airspace.
Its mission set includes interference with radar systems, communications networks, missile guidance channels, and tactical data links. By degrading or denying these capabilities, the EC-2 is intended to support friendly aircraft conducting strike and counter-air missions in contested environments while reducing their exposure to integrated air defense systems.
Airframe Modifications and External Features
To support its electronic warfare role, the EC-2 incorporates significant structural modifications compared to the baseline C-2 transport aircraft. These include a large bulbous nose radome that houses primary jamming antennas, as well as multiple external fairings along the fuselage and tail.
A dorsal fairing positioned behind the cockpit and three large tail-mounted fairings contain additional antenna arrays and electronic surveillance receivers. These structures enable multi-directional signal interception and transmission across a wide frequency spectrum.
The aircraft’s external configuration reflects its role as a high-power electronic warfare platform, with emphasis on sensor coverage and transmission capability rather than aerodynamic efficiency.
Electronic Warfare Systems and Architecture
At the core of the EC-2’s capabilities is an advanced electronic warfare suite derived from the J/ALQ-5 system previously used on the EC-1. The upgraded system integrates modern radio frequency measurement equipment, signal processing units, and high-output jamming transmitters.
The aircraft uses a unified airborne architecture that connects multiple subsystems, allowing it to detect, analyze, and jam multiple electromagnetic signals simultaneously. This enables concurrent operations against various types of emitters, including surveillance radars, fire-control radars, and communication systems.
Specific technical details such as transmitter power levels, frequency coverage, and system performance remain classified.
Platform Advantages and Power Generation
The choice of the C-2 airframe provides significant advantages for the EC-2 mission. With a maximum takeoff weight of approximately 120 metric tons and powered by two General Electric CF6-80C2K1F high-bypass turbofan engines, the aircraft offers substantial onboard electrical generation capacity and cooling capability.
These characteristics are critical for sustained high-power electronic warfare operations. The larger platform also enables extended mission endurance and the ability to carry multiple high-energy systems simultaneously.
The base C-2 platform has a range of approximately 7,600 kilometers with a 20-ton payload, supporting long-duration loiter missions required for stand-off jamming operations.
Specifications (EC-2 / Base C-2 Platform)
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Length: 43.9 meters
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Wingspan: 44.4 meters
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Height: 14.2 meters
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Powerplant: 2 × General Electric CF6-80C2K1F turbofan engines
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Maximum Speed: Approximately Mach 0.82 (~1,000 km/h)
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Range: Approximately 7,600 km (with payload-dependent variation)
Capability Assessment and Role in JASDF Modernization
While official comparisons with other electronic warfare aircraft have not been released, the EC-2 represents a substantial capability increase over the EC-1 due to its higher power output, extended endurance, and ability to operate across multiple frequency bands simultaneously.
The platform is expected to play a central role in Japan’s future electromagnetic operations, including electronic attack and electromagnetic intelligence collection. It will complement other air and missile defense systems by targeting adversary sensors and networks.
Testing and Next Steps
Flight testing will continue at Gifu Air Base and other facilities to validate system performance, integration, and operational effectiveness. This phase will focus on verifying the functionality of the jamming suite, electromagnetic compatibility, and mission system coordination.
The EC-2 program forms part of Japan’s broader effort to strengthen its capabilities in the electromagnetic domain, particularly in response to evolving regional security challenges.
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