Shōkaku

Shōkaku. A lead ship of her class, she was one of the most formidable and modern aircraft carriers in the Imperial Japanese Navy upon her completion. Constructed under the Third Naval Armaments Supplement Programme and commissioned just before the attack on Pearl Harbor, she participated in nearly every major carrier action of the Pacific War alongside her sister ship, ''Zuikaku''. Renowned for her speed, protection, and large air group, she formed the core of the Kido Butai's striking power during the war's early offensive campaigns.

Design and construction

The design of Shōkaku was a direct beneficiary of lessons learned from the earlier naval treaties and the operational experience of carriers like ''Kaga'' and ''Akagi''. Her construction was authorized under the Third Naval Armaments Supplement Programme of 1937, which sought to expand the Imperial Japanese Navy's capabilities beyond treaty limitations. Built at the Yokosuka Naval Arsenal, her hull was laid down on 12 December 1937, and she was launched on 1 June 1939. The design incorporated a heavily armored flight deck, extensive subdivision for survivability, and powerful Gihon geared steam turbines that gave her a top speed exceeding 34 knots. Her air complement was designed to be one of the largest afloat, initially planned to operate over 80 aircraft including the formidable A6M Zero fighter and the D3A dive bomber. Her completion, alongside her sister ship, represented a significant leap in Japanese aircraft carrier design, surpassing contemporary United States Navy carriers like USS ''Enterprise'' in several key metrics at the time of her commissioning on 8 August 1941.

Service history

Upon commissioning, Shōkaku was immediately assigned to the First Air Fleet, the Kido Butai, and began intensive training operations in the Seto Inland Sea. Her combat debut came during the attack on Pearl Harbor in December 1941, where her air group struck targets on Oahu including Wheeler Army Airfield. She subsequently supported the invasion of Rabaul and Lae in January 1942 and participated in the devastating Indian Ocean raid against British Eastern Fleet bases at Colombo and Trincomalee in April. In these early operations, working in tandem with carriers like ''Zuikaku'', ''Sōryū'', and ''Hiryū'', she demonstrated the overwhelming power of Japanese naval aviation. Her air groups were instrumental in providing cover for the Port Moresby invasion force, leading directly to the Battle of the Coral Sea.

Battle of the Coral Sea

During the Battle of the Coral Sea in May 1942, Shōkaku formed the core of the Japanese invasion force aimed at Port Moresby. On 8 May, her aircraft, along with those from ''Zuikaku'', located and attacked the United States Navy task force centered on USS ''Lexington'' and USS ''Yorktown''. Her dive bombers scored significant hits on Yorktown. However, in return, she was attacked by aircraft from USS ''Lexington'' and USS ''Yorktown'', sustaining three bomb hits that severely damaged her flight deck and started serious fires. Although her damage control parties saved the ship, the damage and aircraft losses prevented her from participating in the subsequent Battle of Midway. Her sister ship, ''Zuikaku'', also missed the battle due to depleted air groups, a critical factor in the Imperial Japanese Navy's defeat at Midway Atoll.

Battle of the Santa Cruz Islands

Following repairs, Shōkaku returned to the front lines and was a central participant in the Battle of the Santa Cruz Islands in October 1942. As part of a carrier force under Vice Admiral Nobutake Kondō, which included ''Zuikaku'' and the light carrier ''Zuihō'', she engaged United States Navy forces built around USS ''Hornet'' and USS ''Enterprise''. Her aircraft contributed to the fatal bombing of USS ''Hornet''. However, during the battle, she was again struck, this time by dive bombers from USS ''Enterprise''. She took four to six bomb hits, causing extensive damage to her flight deck and upper hangar, and was forced to retire from the action. This battle, while tactically inconclusive, further attrited the veteran aircrews of the Kido Butai.

Loss

After the Battle of the Santa Cruz Islands, Shōkaku underwent lengthy repairs and refits, missing the crucial naval battles around Guadalcanal. She returned to active service in 1943 and was present during the Battle of the Philippine Sea in June 1944, operating as part of the First Mobile Fleet under Vice Admiral Jisaburō Ozawa. On 19 June 1944, while launching aircraft for strikes against the United States Navy's Task Force 58, she was torpedoed by the United States Navy submarine USS Cavalla (SS-244). Three or four torpedoes struck her starboard side, igniting aviation fuel vapors and triggering catastrophic fires. The resulting explosions proved uncontrollable, and she sank quickly, taking a significant portion of her crew and the commander of Carrier Division 1, Rear Admiral Tomonaga, down with her. Her loss, along with that of ''Taihō'' on the same day, crippled Japanese carrier air power for the remainder of the Pacific War. Category:Aircraft carriers of the Imperial Japanese Navy Category:Shōkaku-class aircraft carriers Category:Ships sunk by American submarines Category:Maritime incidents in 1944