The US State Department has approved a possible Foreign Military Sale to Japan for the modernisation and upgrade of up to 98 Mitsubishi F-15J Eagle air superiority fighters, under an effort that will produce Japanese Super Interceptors (JSI).
Approval of the potential sale, worth $4.5 billion, was announced on October 29 in a media release from the US Defense Security Cooperation Agency (DSCA). Following this announcement, the DSCA notified the US Congress, which will ultimately decide if it goes ahead.
![JASDF F-15J Eagle [USAF Image]](https://fullfatthings-keyaero.b-cdn.net/sites/keyaero/files/styles/article_body/public/inline-images/JASDF%20F-15J%20%5BUSAF%5D%20%231.jpg?itok=1zOE74nt)
The DSCA states that this package would upgrade up to 98 of the Japan Air Self-Defense Force's (JASDF's) F-15Js to a Japanese Super Interceptor configuration. The Japanese government has requested 116 Boeing Advanced Display Core Processor II (ADCP II) mission system computers, 103 Raytheon APG-82(V)1 active electronically scanned array (AESA) radars and 101 BAE Systems ALQ-239 Digital Electronic Warfare Systems (DEWS). Also included are training and technical support, system and munition integration, Selective Availability Anti-spoofing Modules (SAASM), Rockwell Collins AN/ARC-210 radios, Joint Mission Planning Systems (JMPS) and associated spares.
In the media release, the DSCA stated: "This proposed sale will provide Japan a critical air defence capability to assist in defending the Japanese homeland and US personnel stationed there. Modernised F-15J assets will better enable Japan to respond to airborne threats and defend its airspace. Japan will have no difficulty absorbing this equipment and support into its armed forces."
![JASDF F-15J [USAF Image]](https://fullfatthings-keyaero.b-cdn.net/sites/keyaero/files/styles/article_body/public/inline-images/JASDF%20F-15J%20%5BUSAF%5D%20%232.jpg?itok=ct2PvBYD)
The DSCA also noted that Boeing will be the prime contractor through this potential Foreign Military Sale. Mitsubishi Heavy Industries – the company which licence-built the F-15J for Japan – will be the prime contractor through the direct commercial sale, with Boeing being sub-contracted to support the integration process for both sides.
The JASDF has operated the Mitsubishi F-15 Eagle since 1981, with around 155 single-seat F-15J interceptor variants and roughly 45 F-15DJ twin-seat conversion trainer variants in service. The upgrade will cover roughly two thirds of the JASDF's F-15J fleet, with the F-15DJ not being earmarked for the upgrade. The air arm's Eagle force is spread over Japan, operating from air bases at Chitose, Gifu, Komatsu, Naha and Nyutabaru.