Japan Air Self-Defense Force

The Japan Air Self-Defense Force (JASDF) is structured primarily for its core mission: the defense of Japanese airspace. Its main operational units fall under the Air Defense Command, which is regionally divided into Northern, Central, Western and Southwestern sectors, ensuring nationwide coverage. This command controls fighter squadrons, aircraft control and warning units, and surface-to-air missile batteries. It is supported by the Air Support Command for transport and rescue, and by the Air Training Command, Air Development and Test Command and Air Materiel Command.

The JASDF's strategic doctrine remains exclusively defense-oriented, a legacy of Japan's post-war constitution, but it is evolving quickly. The 2022 National Security Strategy formally endorsed a counter-strike capability against enemy missile launch sites, ending a long-standing self-imposed limitation, and the force is now acquiring the stand-off weapons needed to exercise it. There is a parallel shift towards capabilities in the space, cyber and electromagnetic domains, reflected in the planned renaming of the service to the Japan Air and Space Self-Defense Force in 2027. Combined with a sharp rise in defense spending towards two percent of GDP, this represents the most substantial reorientation of Japanese air power since the service was founded.

Operational capabilities are centered on a robust network of ground-based radar and airborne early warning aircraft that provide persistent surveillance, cueing a high-readiness force of fighters for interception. The JASDF sustains a high operational tempo, conducting several hundred scrambles annually in response to Chinese and Russian military activity near its air defense identification zone. These intercepts, primarily involving Chinese aircraft in the East China Sea and around the Nansei island chain and Russian aircraft in the north, place a significant strain on aircrews and equipment while providing constant real-world experience. Chinese ISR flights through the Miyako Strait and the first incursions of Chinese military aircraft into Japanese territorial airspace have made the southwestern approaches the focus of the force's posture.

Modernization rests on three pillars. The F-35 fleet is expanding towards 105 F-35As and 42 F-35Bs, which will make Japan the largest operator outside the United States; the first F-35Bs entered operational service at Nyutabaru in February 2026 and are intended to fly from the converted Izumo-class ships. The remaining F-15Js are being upgraded to the Japan Super Interceptor standard with new radar, electronic warfare systems and stand-off missiles, while the F-2 fleet is to be replaced by the Global Combat Air Programme fighter developed with the United Kingdom and Italy for service around 2035, with the joint venture Edgewing awarded a GBP 4.6 billion development contract in July 2026. Stand-off strike is being built around the upgraded Type 12 surface-to-ship missile, the JASSM-ER and JSM air-launched missiles and Tomahawk, and the force is adding stand-off electronic warfare aircraft, new trainers and unmanned platforms for intelligence, surveillance and reconnaissance.