Ryūjō was a Japanese light aircraft carrier constructed during the early 1930s, designed to exploit a loophole in the Washington Naval Treaty by having a standard displacement of approximately 8,000 metric tons. She measured 179.9 meters (590 ft 3 in) in overall length, with a beam of 20.32 meters (66 ft 8 in) and a draft of 5.56 meters (18 ft 3 in). Her initial design lacked armor, with a lightly built hull to stay within her displacement limits, featuring protective plating only around machinery spaces and magazines. Her hull was notably top-heavy, a flaw that was addressed after modifications following the Tomozuru and Fourth Fleet Incidents, which involved reinforcing her keel, adding ballast, and restructuring her funnels. Ryūjō was powered by two geared steam turbines producing 65,000 shaft horsepower, enabling her to reach speeds of approximately 29.5 knots. She carried 2,490 long tons of fuel oil, providing a range of about 10,000 nautical miles at 14 knots. Her flight deck was a flush deck spanning 156.5 meters (513 ft 5 in), with a width of 23 meters (75 ft 6 in), extended beyond her superstructure, and supported by two pillars. She had two hangars totaling nearly 102.4 meters (335 ft 11 in) each, with an initial capacity of 48 aircraft, although operationally only 37 could be accommodated at once. Aircraft were moved between the hangars and the deck via two elevators, though the rear elevator's limited size hindered operations as aircraft grew larger. Her armament initially consisted of six twin-gun mounts with 12.7 cm (5 in) Type 89 dual-purpose guns and 24 Type 93 13.2 mm machine guns. During her 1934–1936 refit, she received two twin 25 mm Type 96 AA guns to improve her defenses, although these proved largely ineffective throughout the war. The ship’s aircraft complement evolved over her service, ranging from early torpedo bombers and fighters to later aircraft such as the Nakajima B5N "Kate" torpedo bombers and A6M Zero fighters. Commissioned in 1933, Ryūjō saw extensive service in the Second Sino-Japanese War and during World War II, participating in key campaigns such as the invasions of the Philippines, Malaya, and the Dutch East Indies. Notably, she took part in the Second Battle of the Java Sea and the Indian Ocean raid. Her operational history culminated in her participation in the Aleutian Islands campaign, and ultimately her sinking by American carrier-based aircraft during the Battle of the Eastern Solomons on 24 August 1942. Her design, though innovative in circumventing naval treaties, was marred by stability issues, which were only partially mitigated through subsequent modifications.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.