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The I-400-class submarine Imperial Japanese Navy (IJN) submarines were the largest submarines of World War II, with the first one completed just a little over a month before the end of the war. The I-400s remained the largest submarines ever built until the construction of nuclear ballistic missile submarines in the 1960s. The IJN called this type of submarine Sentoku type submarine. The type name was shortened to Toku-gata Sensuikan. They were submarine aircraft carriers able to carry three Aichi M6A Seiran aircraft underwater to their destinations. They were designed to surface, launch their planes, then quickly dive again before they were discovered. They also carried torpedoes for close-range combat.
The Aichi M6A Seiran is a submarine-launched attack floatplane designed for the Imperial Japanese Navy during World War II. It was intended to operate from I-400 class submarines whose original mission was to conduct aerial attacks against the United States.
Ise was the lead ship of her class of two dreadnought battleships built for the Imperial Japanese Navy (IJN) during the 1910s. Although completed in 1917, she played no role in World War I. Ise supported Japanese forces in the early 1920s during the Siberian Intervention in the Russian Civil War. In 1923, she assisted survivors of the Great Kantō earthquake. The ship was partially modernised in two stages in 1928–1929 and 1931–1932, during which her forward superstructure was rebuilt in the pagoda mast style. Ise was reconstructed in 1934–1937, with improvements to her armour and her propulsion machinery. Afterwards she played a minor role in the Second Sino-Japanese War.
I-400 was an Imperial Japanese Navy Sentoku-type submarine commissioned in 1944 for service in World War II. Capable of carrying three two-seat Aichi M6A1 "Seiran" float-equipped torpedo bombers, the Sentoku-class submarines were built to launch a surprise air strike against the Panama Canal. Until 1965, the Sentaku-type submarines—I-400 and her sister ships I-401 and I-402 —were the largest submarines ever commissioned.
The Ise-class battleships were a pair of dreadnought battleships built for the Imperial Japanese Navy (IJN) during World War I. Both ships carried supplies for the survivors of the Great Kantō earthquake in 1923. They were modernized in 1934–1937 with improvements to their armour and machinery and a rebuilt superstructure in the pagoda mast style. Afterwards they played a minor role in the Second Sino-Japanese War.
A submarine aircraft carrier is a submarine equipped with aircraft for observation or attack missions. These submarines saw their most extensive use during World War II, although their operational significance remained rather small. The most famous of them were the Japanese I-400-class submarines and the French submarine Surcouf, although small numbers of similar craft were built for other nations' navies as well.
Ōyodo (大淀) was a light cruiser built for the Imperial Japanese Navy (IJN) during World War II, and was the only ship of her class completed before the end of the war. Designed to command submarine operations, she was obsolete upon completion in 1943. The ship was used as a transport and to escort the navy's capital ships for the rest of the year. Ōyodo was lightly damaged by American aircraft in early January 1944 during one transport mission and returned home several months later to begin conversion to serve as the flagship of the Combined Fleet.
The Type A Kai 2 submarine, also called I-13-class submarine was a pair of large, aircraft-carrying cruiser submarines built for the Imperial Japanese Navy (IJN) during World War II.
The Type B1 submarine, also called I-15-class submarine was the first group of boats of the Type B cruiser submarines built for the Imperial Japanese Navy (IJN) during the 1940s. In total 20 were built, starting with I-15, which gave the series their alternative name.
The Type A1 submarine, also called I-9-class submarine were a trio of aircraft-carrying cruiser submarines built for the Imperial Japanese Navy (IJN) during the 1930s. All three participated in the Pacific War and were lost.
I-401 was an Imperial Japanese Navy Sentoku-type submarine commissioned in 1945 for service in World War II. Capable of carrying three two-seat Aichi M6A1 "Seiran" float-equipped torpedo bombers, the Sentoku-class submarines were built to launch a surprise air strike against the Panama Canal. Until 1965, the Sentaku-type submarines — I-401 and her sister ships I-400 and I-402 — were the largest submarines ever commissioned.
The Japanese aircraft carrier Unryū was the lead ship of her class of fleet aircraft carriers built for the Imperial Japanese Navy (IJN) during World War II. She was commissioned in mid-1944, but fuel and aircrew shortages limited her use to Japanese waters. The impending American invasion of Luzon caused the IJN to order her to transport aircraft and supplies to the Philippines in December. The ship was torpedoed and sunk by the American submarine USS Redfish in the East China Sea during the voyage.
Nisshin (日進) was a seaplane tender (AV) of the Imperial Japanese Navy during World War II.
The Japanese submarine I-28 was one of 20 Type B cruiser submarines of the B1 sub-class built for the Imperial Japanese Navy (IJN) during the 1940s.
The Japanese submarine I-31 was one of 20 Type B cruiser submarines of the B1 sub-class built for the Imperial Japanese Navy (IJN) during the 1940s.
I-14 was an Imperial Japanese Navy Type A Mod.2 submarine that served during World War II. Designed as a submarine aircraft carrier, she was commissioned in March 1945. She surrendered in August 1945 and was sunk as a target in 1946.
I-13 was an Imperial Japanese Navy Type A Mod.2 submarine that served during World War II. Designed as a submarine aircraft carrier, she was commissioned in December 1944 and sunk in July 1945.
I-9 was an Imperial Japanese Navy Type A1 submarine commissioned in 1941. She saw service during World War II, including operations related to the attack on Pearl Harbor, a patrol off the United States West Coast, and in Operation K. She also took part in the Aleutians campaign and the Guadalcanal campaign before she was sunk in June 1943.
I-11 was an Imperial Japanese Navy Type A1 submarine that served during World War II. Designed as a submarine aircraft carrier and submarine squadron flagship, she was commissioned in 1942. She participated in the Guadalcanal campaign and patrolled off Australia, New Caledonia, and the Ellice Islands before she disappeared in 1944 during her sixth war patrol. She badly damaged the Royal Australian Navy light cruiser HMAS Hobart in 1943.
The Yokosuka E6Y was a Japanese submarine-based reconnaissance seaplane developed at the Yokosuka Naval Air Technical Arsenal for the Imperial Japanese Navy during the 1920s. The prototype first flew as the Yokosho 2-Go in 1929.
References
- Dorr Carpenter, Dorr B. & Polmar, Norman Submarines of the Imperial Japanese Navy (1986, Conway Maritime Press)