On October 1, 2005, Atsuta, along with the village of Hamamasu (from Hamamasu District) was merged into the expanded city of Ishikari.
When the AE1P design was accepted, Aichi's version became the Atsuta 32 and Kawasaki's version became the Ha-40, which was to be used in IJAAS's Kawasaki Ki-61 Hien (Allied reporting name "Tony") fighter.
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Postwar evaluation by the Air Technical Service Command's Foreign Aircraft Evaluation Center for the Air Force (located at Wright Field and Freeman Army Airfield) found the Atsuta engine's standard of workmanship was not as good as that of the Army's Kawasaki Ha-40, and far worse than Mitsubishi and Nakajima.
On October 1, 2005, Hamamasu, along with the village of Atsuta (from Atsuta District) was merged into the expanded city of Ishikari.