Mitsubishi F-1

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The Mitsubishi F-1: Japan’s first domestically developed supersonic attack aircraft

The Mitsubishi F-1 is a Japanese swept‑wing, single‑seat, twin‑engine attack aircraft that served with the Japan Air Self‑Defense Force (JASDF) from 1978 to 2006. It is essentially a modified version of the Mitsubishi T‑2 trainer designed for anti‑ship and ground attack missions. The F‑1 was built by Mitsubishi Heavy Industries, with 77 aircraft produced between 1975 and 1987.

Development and design
In the mid‑1960s, the JASDF began looking for an advanced jet trainer that could also be adapted for ground attack and ship‑killing roles. After considering other options, Japan decided to develop its own supersonic trainer, the T‑2, which first flew in 1971. Costs in the T‑2 program nearly halted the attack version, but funding was found when Kawasaki’s P‑XL project was canceled, and the FS‑T2kai (the attack version) received development orders in 1973.

The F‑1 is basically a T‑2 airframe with modifications: the rear seat was removed to create an avionics bay, the canopy was replaced with an access hatch, and two extra hardpoints were added to carry heavier weapons. Avionics were upgraded, including a more capable radar, and the airframe was strengthened to handle a larger weapons load.

Armament and capabilities
The F‑1 carries a 20mm internal Vulcan cannon and seven external hardpoints for various weapons. It can use external fuel tanks to extend its range. Its primary anti‑ship and ground‑attack weapons include the ASM‑1 and ASM‑2 missiles, comparable in role to the Harpoon or Exocet. For air defense, it can carry AIM‑9 Sidewinder missiles, usually on wingtip rails. Ground‑attack stores include 70 mm rocket pods and bombs (Mk 82 and M117), with infrared guidance kits available to convert some bombs into precision‑guided munitions (GCS‑1).

Operational history and retirement
The F‑1’s main role was anti‑ship and ground attack. It was eventually replaced by the Mitsubishi F‑2, a Japan/US‑developed fighter based on the F‑16, as well as upgraded F‑4EJ Kai Phantoms. The last six active F‑1s, based at Tsuiki in Fukuoka Prefecture, were retired on March 9, 2006, after reaching the airframe’s 4,000‑hour limit.

In summary, the F‑1 marked Japan’s first domestically produced supersonic combat aircraft, serving for nearly three decades as a dedicated strike platform before being phased out in favor of newer designs.