The US State Department has approved a potential Foreign Military Sale (FMS) to Japan of Joint Air-to-Surface Standoff Missiles with Extended Range (JASSM-ERs), the US Defense Security Co-operation Agency (DSCA) announced on 28 August 2023.

The proposed sale, which is estimated to be worth USD 104 M (EUR 96.9 M), has been delivered to Congress for final approval.

Japan’s request covers up to 50 AGM-158B/B-2 JASSM-ER cruise missiles, along with JASSM Anti-jam Global Positioning System Receivers, training missiles, spares and various other aspects of training, testing, technical, logistical and programme support.

A JASDF F-15J at Andersen Air Force Base, Guam, on 12 February 2023. Carriage of the JASSM-ER by the JASDF will include, but not be limited to, the F-15J. (Photo: US ANG)

Detailing the objectives of the deal, the DSCA stated that the proposed sale “will improve Japan’s capability to meet current and future threats by providing stand-off capability via advanced, long-range strike systems for employment on Japan Air Self-Defense Force (JASDF) fighter aircraft including but not limited to the F-15J”.

As well as the Mitsubishi/Boeing F-15J, the JASSM-ER could also be deployed by the JASDF’s Lockheed Martin F-35 Joint Strike Fighters and also its Mitsubishi F-2s, which are based on the Lockheed Martin F-16.

The JASSM-ER, which is also made by Lockheed Martin, entered service with the US Air Force (USAF) in 2014 and achieved full operational capability on the USAF’s F-15E in February 2018.

Peter Felstead