The aircraft carriers of the Shōkaku class are generally regarded as
being the most-successful carriers designed by the Imperial Japanese
Navy. They became operational just prior to the Pearl Harbor attack in
December 1941, and their combat records are impressive. Compared with
the preceding aircraft carrier designs, they represented a great design
leap, combining excellent striking power with good protection. Even by
the US Navy these ships were rated highly. During the Pacific War the
two ships of the class participated in all carrier battles with the
exception of Midway, Shōkaku being lost in the Battle of the
Philippine Sea and Zuikaku off Cape Engaño (Battle of Leyte Gulf) in
1944. This is the history of their design and construction, and it
relies heavily on Japanese source material and includes numerous photos
and drawings.