Iruma Air Base

Iruma Air Base is a major Japan Air Self-Defense Force (JASDF) installation located near Tokyo in Saitama, Japan. The base has transitioned from prewar Imperial Japanese Army use through United States Air Force occupation to its current role supporting JASDF units, national ceremonies, and public events. Iruma's proximity to Tokyo International Airport, Narita International Airport, and the Greater Tokyo Area gives it strategic operational and ceremonial importance.

History

Established in 1937 as a Kokutai-era airfield for the Imperial Japanese Army Air Service, the base was active during the Second Sino-Japanese War and the Pacific War. Following Japan's surrender in World War II, the facility was occupied and operated by the United States Air Force during the Allied occupation of Japan, serving alongside installations such as Yokota Air Base and Misawa Air Base. During the Cold War, Iruma hosted United States Forces Japan transient operations and supported regional air defense alongside bases like Komaki Air Base and Chitose Air Base. Returned to Japanese control, the site became a central hub for the Japan Air Self-Defense Force with ties to events including the 1958 Asian Games and various state visits to Tokyo. The base has also been involved in disaster response following events such as the Great Hanshin earthquake and the 2011 Tōhoku earthquake and tsunami.

Facilities and Layout

Iruma occupies a site adjacent to the city of Iruma and features runways, hangars, maintenance areas, and ceremonial spaces similar to those at Hamamatsu Air Base and Komatsu Air Base. The airfield complex includes a primary runway capable of handling transport and liaison aircraft, apron areas used for units like those at Hyakuri Air Base, and hardened shelters modeled after designs seen at Gifu Air Field. Support infrastructure includes fuel farms, air traffic control towers, radar installations with interoperability considerations linked to Japan Self-Defense Forces joint facilities, and logistics depots paralleling those at Tachikawa Airfield during the occupation era. Public access zones are arranged for events comparable to the Iruma Air Show and community outreach efforts similar to those at Misawa Air Base.

Units and Operations

The base hosts JASDF squadrons and support groups tasked with transport, liaison, and ceremonial missions, reflecting roles akin to units at Chitose Air Base and Naha Air Base. Iruma supports aerial transport operations in coordination with the Ministry of Defense and disaster relief efforts in concert with agencies like the Japan Self-Defense Forces Central Readiness Force and prefectural emergency services. Training sorties and flight operations are conducted regularly, with interoperability exercises held alongside units from United States Forces Japan, the Japan Maritime Self-Defense Force, and the Japan Ground Self-Defense Force. The base also supports VIP transport during state visits by leaders from United States, United Kingdom, China, South Korea, and other nations, integrating protocols used at Haneda Airport and Narita International Airport for diplomatic arrivals.

Aircraft and Equipment

Iruma's fleet historically included liaison and transport types comparable to those operated at Iruma Air Base's peer installations: light transports and utility helicopters similar to Kawasaki C-1, Kawasaki C-2, and rotary-wing types analogous to UH-60J search-and-rescue helicopters used by other JASDF units. The base maintains ground support equipment, avionics workshops, and maintenance facilities consistent with standards at Tsuiki Air Field and Gifu Air Field. Aircraft marshaling and preservation practices align with procedures codified across Japan Air Self-Defense Force airfields and international standards followed by United States Air Force partner bases.

Role in Civil Aviation and Events

Iruma is notable for hosting public air shows and community events, paralleling spectacles at Komaki Air Base and Fukuoka Airport where military and civilian aviation communities intersect. The annual air show attracts visitors from the Kantō region and features aerial demonstrations, static displays, and ceremonial flypasts similar to those conducted for national holidays and state ceremonies in Tokyo. The base has been used for emergency airlift and humanitarian missions in coordination with Tokyo Metropolitan Government and regional governments such as Saitama Prefecture. Cultural and historical outreach links Iruma to museums and memorials commemorating aviation history, including institutions like the Hamamatsu Air Park and the Yokota Air Base heritage programs.

Category:Japan Air Self-Defense Force bases Category:Airports established in 1937 Category:Buildings and structures in Saitama Prefecture