• Arms Control Today

The Trump administration gave its final approval Jan. 29 for a $2.2 billion sale of missile defense systems to Japan. Congress received notification of the deal, including two Aegis Ashore missile interceptor batteries, from the Defense Security Cooperation Agency, triggering a 30-day opportunity for Congress to object, which happens rarely. The sale notification was delayed by the 35-day U.S. government partial shutdown, which slowed the Foreign Military Sales approval process, including a necessary green light from the U.S. State Department.

The sale reflects expanding U.S. support for Japan’s multilayered missile defenses, which already include multiple U.S.-provided Aegis systems on Kongo-class destroyers. Japan’s cabinet approved missile defense expansion plans in December 2017. (See ACT, September 2018.)

The Aegis Ashore systems are slated to feature the Standard Missile-3 Block IIA missile interceptor, which is currently completing testing. (See ACT, December 2018.) The interceptor uses hit-to-kill technology to defeat short- and intermediate-range ballistic missiles. The scope of intended targets may increase because the Trump administration's 2019 Missile Defense Review calls for testing the interceptor against an intercontinental ballistic missile-class target in 2020.

The defense sale includes supporting equipment, software, U.S. construction and logistical services, and six vertical launchers.—SASHA PARTAN