Kumagaya Army Air School

Kumagaya Army Air School (熊谷陸軍飛行学校) was established on December 1, 1935, in Ōsato District, Saitama Prefecture (present-day western Kumagaya City), as part of the Imperial Japanese Army's aviation force expansion plan. The school's primary mission was to provide foundational flight training for young aviation soldiers (少年飛行兵), non-commissioned officer pilots, and officers undergoing flight training. It became the central institution for the Army's ambitious program to recruit and train teenage aviation cadets.

The young aviation soldier (少年飛行兵) system was formalized in August 1933, selecting teenage volunteers through competitive examinations to serve as enlisted aviation NCOs. These cadets, typically aged 14-17, underwent rigorous ground school education covering meteorology, aerodynamics, aviation engineering, and navigation, followed by progressive flight training on aircraft such as the biplane primary trainers nicknamed "Akatombo" (Red Dragonfly) and the Tachikawa Ki-55 advanced trainer.

The school operated multiple branch training sites (分教場) to accommodate increasing enrollment: Okegawa (桶川, established June 1937), Matsudo (松戸), Toyooka (豊岡), and others across the Kantō Plain. The Okegawa sub-school, situated along the Arakawa River which served as an emergency landing strip, trained an estimated 1,500-1,600 aviation cadets during its operation. Training courses lasted five to six months and included basic flight instruction covering level flight, aerobatics (loops, spins, rolls), and formation flying.

The school's first commander was Major General Giga Tetsuji (儀峨徹二少将, December 1935 - August 1936). Subsequent commanders included Major General Nagasawa Kenjirō (1936-1937), Lieutenant General Ebashi Eijirō (1937-1938), Major General Iwashita Shintarō (1938-1940), Major General Hongō Yoshio (1940-1943), Major General Matsuoka Shōzō (1943), Major General Hirata Katsuji (1943-1944), and Colonel Katō Toshio (1944-1945).

In April 1940, the trainee designation was officially changed from "operations students" (操縦生徒) to "young aviation soldiers" (少年飛行兵), reflecting the program's growing importance. By the early 1940s, thousands of young men had passed through the school, many going on to serve as fighter and bomber pilots across the Pacific theater.

As the war situation deteriorated and Allied air raids intensified over the Japanese home islands, training became increasingly difficult. In February 1945, the Kumagaya Army Air School was formally dissolved and reorganized as part of the 52nd Air Division. The Okegawa sub-school was redesignated as the 6th Training Air Squadron of the 52nd Air Division (secret designation: "Kon Unit 540") and converted into a special attack (tokko/kamikaze) training base, preparing pilots for one-way suicide missions against Allied naval forces.

The devastating Kumagaya Air Raid occurred on the night of August 14-15, 1945, making it one of the very last B-29 bombing missions of World War II. On August 14, 77 B-29 Superfortresses of the 314th Bombardment Wing and 16 B-29s of the 313th Bombardment Wing launched from bases on Guam. Beginning at approximately 23:30 on August 14 and lasting until 01:39 on August 15, the bombers dropped thousands of M-69 incendiary bombs from altitudes of 3,000-5,000 meters. The resulting firestorm, burning at 800-1,200°C, destroyed approximately 74% of the city's residential area (358,000 tsubo), including 3,630 structures. At least 266 civilians were killed, over 3,000 injured, and 15,390 residents were left homeless. The city of 47,000 was left in ruins.

The timing of this raid was particularly tragic: the Japanese government had already decided to accept the Potsdam Declaration on August 14, but the ceasefire order from Washington did not reach the Mariana Islands bomber command until 04:45 on August 15 — hours after the bombers had already completed their mission. Along with the simultaneous raids on Isesaki (Gunma Prefecture) and Tsuchizaki (Akita Prefecture), Kumagaya represents one of the last cities to burn from American firebombs before the war's end.

After Japan's surrender, the former school site was occupied by the U.S. Army's 43rd Infantry Division in September 1945, serving as an American military camp for approximately 13 years. In August 1958, the site was returned to Japan and became JASDF Kumagaya Air Base (航空自衛隊熊谷基地), which currently houses the Air Self-Defense Force's 4th Technical School and educational facilities. The base has only a heliport and no runway.

The Okegawa branch school buildings, remarkably the only surviving structures from any Imperial Army flight school in Japan, were designated as a municipal tangible cultural property. After extensive restoration work from June 2018 to March 2020, the site reopened on August 4, 2020 as the "Okegawa Flight School Peace Memorial Hall" (桶川飛行学校平和祈念館), preserving the guard station, garage, barracks, and other original structures. In Kumagaya city, the Hoshikawa riverside area where approximately 100 victims perished features a "War Victims Memorial Goddess" statue (戦災犠牲者慰霊女神像) erected in 1975 by sculptor Kitamura Seibo. The Saitama Prefectural Peace Museum (埼玉県平和資料館) regularly hosts exhibitions titled "The Last Air Raid on Kumagaya" (最後の空襲くまがや) to preserve the memory of the tragedy.