Johnson Air Base

Iruma Air Base 入間基地 Iruma-kichi
IATA: none ICAO: RJTJ
Summary
Airport type	Military
Operator	JASDF
Location	Sayama, Saitama, Japan
Elevation AMSL	295 ft / 90 m
Coordinates	35°50′31″N 139°24′38″E / 35.84194°N 139.41056°E / 35.84194; 139.41056Coordinates: 35°50′31″N 139°24′38″E / 35.84194°N 139.41056°E / 35.84194; 139.41056
Map
Iruma Air Base Location in Japan
Runways
Direction Length Surface m ft 17/35 2,000 6,562 Asphalt concrete
Source: Japanese AIP at AIS Japan

Iruma Air Base (入間基地, Iruma-kichi^?) (ICAO: RJTJ) is a Japan Air Self-Defense Force base located in the city of Sayama, Saitama Prefecture, north of western Tokyo, Japan.

It was the airfield for the Imperial Japanese Army Air Force Academy until 1945, when it became Johnson Air Force base of the United States Air Force during and after the occupation of Japan.

Currently, Iruma Air Base is home to the Air Defense Command Headquarters Flight Group. Aircraft located at the base include the U-4, NAMC YS-11, T-4, and Kawasaki C-1. Its annual air show on the November 3rd Culture Day holiday is a popular public event.

Iruma was established in 1937 by the Imperial Japanese Army Air Force and named Irumagawa Airfield. Opened in December 1938, it was the air academy for the Japanese Army Air Force, with its academy located at the nearby town. Mostly training aircraft operated from the base, including Kawasaki Ki-10 (Army Type 95 Fighter Model 1) biplanes painted orange. During World War II, the IJAAF 14th Sentai operated Mitsubishi Ki-67 medium bombers from Irumagawa. Attacked several times by USAAF B-29 Superfortress bombers, the last missions by the IJAAF were one-way missions using Yokosuka MXY7 Ohka purpose-built, rocket-powered, human-guided, anti-shipping kamikaze attack planes against American ships operating off the coast.