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Missile Defense Agency

MDA News Release

5700 18th Street, Bldg 245
Fort Belvoir, VA 22060-5573

Japanese Aegis System-Equipped Vessel (ASEV) Successfully Demonstrates J7.B Software Build

September 13, 2022

On August 10, 2022, the Missile Defense Agency (MDA), U.S. Navy Aegis Technical Representative, and Japan Maritime Self-Defense Force witnessed another successful demonstration of the J7.B software build in support of the Japanese ASEV program. This demonstration known as ASEV Software Release 3, allows Japan to field J7.B software and the SPY-7(V)1 radar onboard a sea-based ASEV platform to provide ballistic missile defense (BMD) of the Japanese homeland.

A prior demonstration of this software capability known as ASEV Software Release 2, conducted in January 2022, showed Aegis Baseline J7.B with SPY-7(V)1 has the capability to perform engagements against ballistic missiles with the U.S.-Japan cooperatively-developed Standard Missile-3 Block IIA missile. In addition to the capabilities demonstrated by Release 2, this Release 3 demonstration proved functional control of the SPY-7(V)1 Solid State Radar with Aegis Baseline J7.B hardware and software including Engage on Remote function and large-raid engagement. The complete BMD fire control loop and functions were exercised in this demonstration, validating that the program is progressing on schedule, with a majority of development work now complete.

“MDA has confirmed Aegis Baseline J7.B hardware and software can command and control the SPY-7(V)1 radar, demonstrating all the major BMD capabilities required for the Japanese ASEV," said MDA Director, Vice Admiral Jon Hill. "This is another vital milestone in development and integration efforts. The overall ASEV J7.B with SPY-7 effort remains on track for meeting cost, schedule, and performance criteria. This program will provide Japan with the latest BMD capabilities, which will undoubtedly contribute to the defense of Japan under the increasing regional missile threats.”

The SPY-7(V)1 radar uses scaled equipment and software derived from the MDA’s advanced Long Range Discriminating Radar (LRDR) located in Clear, Alaska.