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Aichi was the fourth biggest Japanese aircraft company of the Second World War. The Aichi Tokei Denki K.K. (Aichi Clock and Electric Co Ltd) began to produce airframes at its Funakata plant in Nagaya in 1920. Engines followed in 1927, and during the early 1930s Aichi became a major supplier of military aircraft to the Imperial Japanese Navy.
Aichi benefited from a good working arrangement with Heinkel. The D1A dive bomber was a much modified version of the Heinkel He 66, while the famous D3A ‘Val’ used wings similar to those on the Heinkel He 70.
Engine production moved to the new Atsuta plant in south central Nagoya in 1938. Three years the Eitoku plant, a second airframe factory, opened in Nagoya. In March 1943 the Aichi Kokuki K.K. (Aichi Aircraft Co Ltd) was spun off as a separate company, taking over all of the aircraft and engine work. In late 1944 the pressure from American bombing forced the company to disperse its production, and at the end of the war the aircraft company was dissolved.
Main Aircraft
  D1A Dive Bomber
  D2A ‘Susie’ Dive Bomber
  D3A ‘Val’ Dive Bomber 
  E10A Reconnaissance seaplane
  E13A ‘Jake’ Reconnaissance Float Plane 
  E16A Zuiun (Auspicious Cloud) ‘Paul’ Reconnaissance Float Plane
  B7A Ryusei (Shooting Star) Torpedo Bomber
Minor Aircraft and  Projects
  HD-23 prototypes
  H9A Flying-boat trainer.
  M6A Seiran (Mountain Haze) Submarine-borne bomber
  S1A Denko (Bolt of Light) Night Fighter
  E11A1 Night Reconnaissance Seaplane
  E12A Reconnaissance Seaplane prototype
  C4A reconnaissance prototype
Other Aircraft  Produced 
  Yokosuka  D4Y Suisei (Comet) ‘Judy’
Engines
  Licence-built Daimler-Benz DB 601 as Atsuta series.