From Wikipedia, the free encyclopedia

Imperial Japanese Military

Administration Imperial General Headquarters Components Imperial Japanese Navy (Dai Nippon Teikoku Kaigun)         Imperial Japanese Navy Air Service     Major battles     List of ships     List of aircraft     Main admirals Imperial Japanese Army (Dai Nippon Teikoku Rikugun)         Imperial Japanese Army Air Service         Railways and Shipping Section     Uniforms Rank insignia Naval rank insignia Army rank insignia History of the Japanese Military Military History of Japan during World War II

The Imperial Japanese Army Air Service, or more traditionally called the Japanese Army Air Force (陸軍航空本部 Rikugun Kōkū Hombu), was Imperial Japan's land-based aviation force. Imperial Japan did not maintain a separate and independent air force so both the Imperial Japanese Army (IJA) and the Imperial Japanese Navy (IJN) maintained their own air services.

The IJA's Army Air Service was responsible for the strategic bombing of main Chinese cities such as Shanghai and Chongqing. The violent bombing of Nanjing and Guangzhou in 1937 led to a resolution of protest by the Far Eastern Committee of the League of Nations. The Air service also provided tactical air support for ground troops while maintaining a limited air-to-air capability.

The Imperial Japanese Navy Air Service was responsible for strategic bombing and national air defense. The Army Air Service also did not control the light aircraft deployed and operated by the IJA artillery as spotters or observers. The Army Air Service was managed by Army Aeronautical Department, such administrative unit was equal to Imperial Japanese Navy Aviation Bureau.

The Imperial Japanese Army Air Service was similar in function to the German Air Force (Luftwaffe) or the Soviet Union's Red Air Force (Voenno-Vozdushnye Sily, or VVS) Frontal Aviation(which focused on battlefield air defense, close air support, and air interdiction) as it existed primarily to provide tactical air support to the IJA and did not acquire any other duties till late in the war. The IJN Air Service was vested with national air defense and strategic air operations.

Contents 1 Organization 1.1 Territorial 1.2 Functional 2 Special Air Units 3 Training Organization 4 Army Air Arsenal 5 Army Escort-Aircraft Carriers 6 Strength 7 Kitai system 8 Uniforms and equipment 9 References 10 See also 11 External links

The Army Air Service was organized into 5 Air Armies, koku-gun, with each maintaining a clear area of operations (ie, one per theater of war). These were:

• 1st - Home or General Air Army :HQ Tokyo, General Defense Command consisting of the Japan Defence Army, Formosa Army, and Chosen Army of Japanese occupied Korea.
• 2d - Manchuria Air Army: HQ Hsinking, Kwangtung Army
• 3rd - Southern Air Army: HQ Singapore, Southern Army
• 4th - New Guinea Air Army, formed in 1943, HQ Rabaul and Wewak, 8th Area Army
• 5th - China Air Army, formed in 1944, HQ Nanking, China Expeditionary Army

Each Air Army contained 2 or more Air Divisions, hiko-shidan, containing 2 or more Air Brigades, hiko-dan, each. Optimally, an Air Division was assigned to each Group Army and an Air Brigade was assigned to a Field Army.

Each Air Brigade contained a Headquarters, chutai hombu, responsible for tactical planning and 3 or 4 Air Regiments, hiko rentai, plus some reconnaissance and transport aircraft units.

Air Regiments usually contained only one type and brand of aircraft, such as fighters or light or medium bombers. Air Regiments consisted of 3 or 4 Air Companies, chutai, of, usually, 9-12 aircraft or two Air Battalions (hiko daitai) of 2 Air Companies. These Air Companies contain 3 sections, shotai, of 3 later 4 aircraft each. However, fighter Air Regiments contained 45 to 48 aircraft and the Bomber and/or Recon Air Regiments contained 27 to 36 aircraft. The Air Regiments themselves were later replaced with Air Groups called Hiko Sentai which consisted of only one category of aircraft but could operate several different types as needed or available.

The IJAAS also organized Independent Air Companies or dokurista Chutai and Independent Air Wings called dokuristu hikotai whick performed missions such as reconnaissance, VIP transport, etc.

The "Shaking Heaven" Air Superiority Units or Shinten Seiku-tai were specially designated and trained sections of fighter units with the mission of air-to-air ramming of allied bomber aircraft. They usually had their armaments removed and their airframes may have been reinforced.

Lastly it raised the Special Attack Units called the Shimbu-tai which were dedicated suicide units for Kamikaze missions. Around 170 of these units were formed, 57 by the Instructor Air Division alone. Notionally equipped with 12 aircraft each, it eventually comprised around 2000 aircraft.

• Hikoshidan Hikotai - The Instructor Air Divisions
  • Akeno, Hakujoshi, Hamamatsu, Hitachi, Hokota, Kumagawa, Mito, Niigata, Shimoshizu, Tachiari, Tachigawa, Tokorozawa, Utsonomiai and Anshan Kyodo-Hikotai (Army Flying Schools)
• Kyoiku Hiko Rentai - Air Training Groups
  • 101st, 1-4th, 105th, 107th, and 115th
• Koku Shikan Gakko - Army Air Academy, located at Irumagawa, Japan
• Tachigawa Army Air Test Center
• Tokooya Army Air Officers School
• Tokorozawa Army Air Maintenance School
• Utsonomia Army Air Communications School

Japanese Air Army Service possessed one special air technical section, the First Tachikawa Air Army Arsenal. These section of the special workshop and air technical institution in charge of all aerial developments of Air Army service units. Between the technical branches was the Testing Section for Captured allied aircraft, with installations in Tachikawa, Philippines and Singapore. Another section of Tachikawa Hikoki K.K. and Rikugun Kokukosho K.K. the Army's aircraft companies, who was responsible for continuing aircraft development and, along with Tachikawa, the manufacture of some aircraft for Japanese Army. Its assignment was very similar to that of the Yokosuka Naval Arsenal testing center for Imperial Japanese Navy Air Service.

In order to escort and protect transport shipping convoys comprised of other types of landing carriers (for transporting personnel, aircraft and tanks), the IJA ordered the designing and construction of Escort/Landing Craft Carriers. These were the Type Ko, Otsu and Hei, Taiyō Class, Kaiyo Class, Akitsu Class, Yamashiro Class, Shinyo Class, Kamakura Class, Akitsu Class and Kumano Class. Such escort/transport carriers, were converted from small passenger liners or merchant ships and were intended for supporting duties such as training, convoy escort, troops, armor and aircraft transport between occupied land and islands.

These vessels were named Taiyō Maru, Unyo Maru, Chuyo Maru, Kaiyō Maru, Shinyo Maru, Kamakura Maru, Akitsu Maru, Nigitsu Maru, Kumano Maru, Yamashiro Maru, Chigusa Maru, Shimane Maru, and Otakisan Maru. They were operated by civilian seamen with Army or IJN units manning the light and medium AA guns; the air defense was charged to IJAAF antisubmarine units aboard alongside the regular armed fighters.

These escort carriers possessed the capacity to operate 8, 20, 24, 27, 28, 33, 37 or 38 aircraft of assorted types (fighters, light or inclusive twin engined bombers), and also to transport personnel and tanks.

These transport vessels as equal at Merchant aircraft carriers (MAC) and Aircraft merchant ship (AMC) used by Allied for escort merchant convoys in the Atlantic in wartimes.

In 1940 the Army Air Service consisted of the following:

• • 33,000 personnel
  • Over 1,600 aircraft (including 1,375 first line combat aircraft).
  • The aircraft were organized into 85 Air Companies;
    • 36 fighter,
    • 28 light bomber, and
    • 22 medium bomber.

The Kitai system was the IJA's type number for its aircraft. It was abbreviated to Ki and subsets could be added for later modifications (Mitsubishi Ki-1-11). They were established in the sequence as different aircraft were adopted and not according to the aircraft type such as is used in the west.

As part of the IJA, the Army Air Service wore the standard army uniforms. Only Flying personnel and groundcrews wore theirs with sky blue trim and stripes, while officers wore their ranks on sky blue patches.

• Ikuhiko Hata, Yasuho Izawa, and Christopher Shores, Japanese Army Air Force Fighter Units and Their Aces, 1931-1945 (London: Grub Street, 2002) ISBN 1-902304-89-6

• List of military aircraft of Japan
• Giretsu (special forces operations)
• Teishin Shudan (Army air service airborne/commando division)
• Hikotai Transport Unit
• Army Aeronautical Department
• Inspectorate General of Aviation
• List of Radars in use by Imperial Japanese Army
• List of Bombs in use by Imperial Japanese Army
• List of weapons on Japanese combat aircraft
• List of Aircraft engines in use of Japanese Army Air Force
• List of foreign aircraft captured by Japanese forces in WW2
• List of foreign aircraft tested by Japanese forces from 1930s to WW2
• List of Japanese trainer aircraft during World War II
• Japanese military aircraft designation systems
• Battle of the Philippines (1941-42)
• WWII Battle of Japan (Air War)

• An introduction to the Japanese Army Air Force
• Images of Axis aircraft: German, Italian and Japanese Army and Navy
• Advanced Japanese aircraft
• General resources on Japanese aircraft
• Some captured aircraft, or aircraft in evaluation
• Japanese armaments, vehicles, aircraft, electronic warfare and some Japanese special weapon technology
• 248th Hiko Sentai {For reference only}

v • d • e Lists relating to aviation
General	Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines
Military	Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft
Notable incidents and accidents	Military aviation · Airliners · General aviation · Famous aviation-related deaths
Records	Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft