This book covers the design and construction of the two well-known Soryu and Hiryu carriers, and the lesser-known ships of the Unryu class, and relies on original Japanese source material, including numerous photos, drawings, and specifications. How and why the Japanese designed and constructed the WWII-era, medium-sized Soryu-, Hiryu-, and Unryu-class aircraft carriers, and how they were operated, is covered in detail. The Imperial Japanese Navy planned the construction of 45 aircraft carriers from 1918 to 1943 and commissioned twenty-five of them between 1922 and 1944. These types were large, medium, and small aircraft carriers, with some converted from other warship classes, and escort aircraft carriers remodeled from passenger ships. The medium type presented here formed the majority, with a total of 18 planned: five were completed, three remained in various completion stages at the end of the Pacific War, and ten were eventually canceled.
Lars Ahlberg is a retired Swedish army officer. Since his early youth he has been interested in naval history, and he is the coauthor of a monograph about the aircraft carrier?Taih??and the Yamato class of carrier, as well as?Armourclad Fus? to Kong? Class Battle Cruisers, vol. 1 in?Capital Ships of the Imperial Japanese Navy, 1868?945. He has also written books about the Halland Regiment. Hans Lengerer was in government service (executive) until retirement. After contacts with the late Erich Gr?er, he was encouraged by the late J?gen Rohwer to publish on the IJN. He has written more than fifty articles and nine books. He privately publishes, together with Lars Ahlberg,?Contributions to the History of Imperial Japanese Warships, of which seventeen issues have thus far been completed.

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