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| 61st Air Group | |
|---|---|
| Unit name | 61st Air Group |
| Dates | 1943–1945 |
| Country | Empire of Japan |
| Branch | Imperial Japanese Navy Air Service |
| Type | Naval aviation group |
| Role | Carrier-based fighter and bomber operations |
| Garrison | Yokosuka Naval District |
| Notable commanders | Hiroaki Abe, Masahisa Saito |
| Battles | Mariana and Palau Islands campaign, Philippines campaign, Battle of Leyte Gulf, Battle of the Philippine Sea |
61st Air Group
The 61st Air Group was an Imperial Japanese Navy Air Service (IJNAS) aviation unit formed during World War II. It served in the Pacific Theater, operating from aircraft carriers and land bases in campaigns including the Mariana and Palau Islands campaign, the Philippines campaign, and the Battle of Leyte Gulf. The unit flew carrier-capable fighters and dive bombers and was engaged against United States Navy, United States Army Air Forces, Royal Australian Air Force, and other Allied formations.
The unit was established as part of a broader IJNAS expansion amid losses sustained during the Guadalcanal campaign and the Solomon Islands campaign. It was raised contemporaneously with reorganizations affecting the Third Fleet, First Air Fleet, Second Air Fleet, and Combined Fleet to replenish losses after engagements such as the Battle of the Coral Sea and the Battle of Midway. The 61st Air Group took part in the strategic defense of the Mariana Islands, confronting carrier task forces including elements of Task Force 58 and Task Force 38 during the Battle of the Philippine Sea and subsequent operations near Leyte Gulf against the Imperial Japanese Navy’s remaining carrier and surface units.
Formed under directives from the Naval General Staff and the Yokosuka Naval District, the air group comprised fighter, dive bomber, and reconnaissance squadrons organized into hikotai and sentai structures typical of IJNAS doctrine. Personnel were drawn from flight training programs at Kasumigaura, Tateyama, and Atsugi air training establishments and were assigned to carriers and land bases coordinated by the Naval Air Bureau. The command relationships linked the group to fleet carriers, seaplane tenders, and shore establishments in the Kure Naval District and Sasebo Naval District for logistics, maintenance, and replacement pilots.
Aircraft types operated included carrier-capable fighters such as the Mitsubishi A6M Zero and later-model Nakajima fighters, along with dive bombers like the Aichi D3A "Val" and, in some detachments, the Yokosuka D4Y "Judy". The group employed reconnaissance seaplanes and liaison aircraft for artillery spotting and fleet reconnaissance, relying on ordnance supplied through carrier magazines and naval arsenals at Kure and Sasebo. Maintenance and armament were overseen using technical manuals from the Naval Air Technical Arsenal and spare parts produced by Nakajima Aircraft Company, Mitsubishi Heavy Industries, and Aichi Kokuki.
The 61st Air Group flew combat sorties during major Pacific engagements, facing opposition from United States Navy carrier air wings, United States Army Air Forces heavy bomber and fighter units, Royal Australian Air Force squadrons, and British Commonwealth naval aviation elements. In the Battle of the Philippine Sea, pilots engaged fast carrier task forces equipped with Grumman F6F Hellcats, Chance Vought F4U Corsairs, and Curtiss SB2C Helldivers belonging to Task Force 58. During the Philippines campaign and the Battle of Leyte Gulf, the group conducted strike missions against escort carriers, cruisers, and transport convoys, encountering radar-directed Combat Air Patrols from Task Group formations and facing anti-aircraft fire from Allied cruisers and destroyers.
Following catastrophic losses in carrier aviation capability after Leyte Gulf and the sustained Allied advance across the Marianas and Philippines, the 61st Air Group was progressively withdrawn, reconstituted, and ultimately disbanded as part of the wider collapse of IJNAS operational capacity. Surviving personnel were reassigned to shore-based air training units, coastal defense formations, and naval base commands at Yokosuka, Kure, and Maizuru until Japan’s surrender, after which remaining assets were demobilized under the terms of the Instrument of Surrender and Allied occupation directives.
Notable commanding officers included senior IJNAS aviators appointed from the ranks of carrier and fleet aviation leadership, many of whom had served in earlier campaigns such as the Second Sino-Japanese War and the Pacific campaigns. Command relationships connected the group’s commanders with fleet admirals and carrier air group chiefs who coordinated operations with Combined Fleet staff and naval air bureaus.
The group adopted insignia, squadron markings, and traditions reflecting IJNAS heraldry observed across carrier air groups, with tail codes, Hinomaru roundels, and squadron emblems painted on fuselages and tailplanes. Ceremonial practices and pilot customs derived from naval aviation culture centered on carrier deck operations, pilot graduation rites at Kasumigaura flight schools, and commemorations linked to actions in the Central Pacific campaigns.
Empire of Japan Imperial Japanese Navy Imperial Japanese Navy Air Service Mitsubishi A6M Zero Nakajima Aircraft Company Aichi D3A Yokosuka D4Y Battle of the Philippine Sea Battle of Leyte Gulf Mariana and Palau Islands campaign Philippines campaign (1944–45) Task Force 58 Task Force 38 Combined Fleet (Imperial Japanese Navy) Third Fleet (Imperial Japanese Navy) First Air Fleet (Imperial Japanese Navy) Second Air Fleet (Imperial Japanese Navy) Naval General Staff (Japan) Yokosuka Naval District Kure Naval District Sasebo Naval District Kasumigaura Tateyama, Chiba Atsugi Kure, Hiroshima Sasebo, Nagasaki Maizuru Naval Air Bureau (Imperial Japanese Navy) Naval Air Technical Arsenal Nakajima Mitsubishi Heavy Industries Aichi Kokuki Grumman F6F Hellcat Chance Vought F4U Corsair Curtiss SB2C Helldiver United States Navy United States Army Air Forces Royal Australian Air Force British Commonwealth Escort carrier Cruiser Destroyer Aircraft carrier Seaplane tender Pilot Flight training Carrier deck Instrument of Surrender Allied occupation of Japan Second Sino-Japanese War