The IJN 9th Fleet (第九艦隊, Dai-kyū Kantai) was a fleet of the Imperial Japanese Navy established during World War II.
Established on 15 November 1943, the IJN 9th Fleet was a headquarters unit established to direct Japanese naval operations in New Guinea. The ships and equipment of the IJN 9th Fleet were under the operational control of the Southeast Area Fleet. It provided support for Japanese troops on the northern coast of New Guinea, and also administered the No.2 and No.7 Base units of land forces assigned to occupy northern New Guinea. By the time the IJN 9th Fleet had been established, much of New Guinea had already been retaken by American forces under Operation Cartwheel, and the IJN 9th Fleet could do little more than provide defensive support and limited supplies.
In March 1944, survivors of the two Base Units merged into the No.27 Special Base unit, at which time the IJN 9th Fleet came under the operational control of the Southwest Area Fleet. It was disbanded on 10 July 1944.
Commander in chief
| Rank | Name | ||
|---|---|---|---|
| 1 | Vice-Admiral | Yoshikazu Endo | 15 Nov 1943 – 10 Jul 1944 |
Chief of staff
| Rank | Name | ||
|---|---|---|---|
| 1 | Rear-Admiral | Masaki Ogata | 15 Nov 1943 – 3 May 1944 |
The Combined Fleet was the main sea-going component of the Imperial Japanese Navy. Until 1933, the Combined Fleet was not a permanent organization, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units normally under separate commands in peacetime.
Chūichi Nagumo was an admiral in the Imperial Japanese Navy (IJN) during World War II. Nagumo led Japan's main carrier battle group, the Kido Butai, in the attack on Pearl Harbor, the Indian Ocean raid and the Battle of Midway. He committed suicide during the Battle of Saipan.
Operation Cartwheel (1943–1944) was a major military operation for the Allies in the Pacific theatre of World War II. Cartwheel was an operation aimed at neutralising the major Japanese base at Rabaul. The operation was directed by the Supreme Allied Commander in the South West Pacific Area (SWPA), General Douglas MacArthur, whose forces had advanced along the northeast coast of New Guinea and occupied nearby islands. Allied forces from the South Pacific Area, under Admiral William Halsey, advanced through the Solomon Islands toward Bougainville. The Allied forces involved were from Australia, the Netherlands, New Zealand, the US and various Pacific Islands.
The bombing of Rabaul in November 1943 was an air attack conducted by the Allies of World War II upon a cruiser force at the major Japanese base of Rabaul. In response to the Allied invasion of Bougainville, the Japanese had brought a strong cruiser force down to Rabaul from Truk, their major naval base in the Caroline Islands about 800 miles north of Rabaul in preparation for a night engagement against the Allied supply and support shipping. Allied carrier- and land-based planes attacked the Japanese ships, airfields, and port facilities on the island of New Britain to protect the Allied amphibious invasion of Bougainville. As a result of the Rabaul raids, the Japanese naval forces could no longer threaten the landings. The success of the raid began to change the strongly held belief that carrier-based air forces could not challenge land-based air forces.
The Imperial Japanese Navy Air Service (IJNAS) was the air arm of the Imperial Japanese Navy (IJN). The organization was responsible for the operation of naval aircraft and the conduct of aerial warfare in the Pacific War.
The Imperial Japanese Navy in World War II, at the beginning of the Pacific War in December 1941, was the third most powerful navy in the world, and the naval air service was one of the most potent air forces in the world. During the first six months of the war, the Imperial Japanese Navy enjoyed spectacular success inflicting heavy defeats on Allied forces, being undefeated in every battle. The attack on Pearl Harbor crippled the battleships of the US Pacific Fleet, while Allied navies were devastated during Japan's conquest of Southeast Asia. Japanese Navy aircraft operating from land bases were also responsible for the sinkings of HMS Prince of Wales and HMS Repulse which was the first time that capital ships were sunk by aerial attack while underway. In April 1942, the Indian Ocean raid drove the Royal Navy from South East Asia. After these successes, the Japanese now concentrated on the elimination and neutralization of strategic points from where the Allies could launch counteroffensives against Japan's conquests. However, at Coral Sea the Japanese were forced to abandon their attempts to isolate Australia while the defeat at Midway saw them forced on the defensive. The campaign in the Solomon Islands, in which the Japanese lost the war of attrition, was the most decisive; they had failed to commit enough forces in sufficient time.
Tatsuta (龍田) was the second ship in the two ship Tenryū class of light cruisers in the Imperial Japanese Navy (IJN). She was named after the Tatsuta River in Nara Prefecture, Japan.
Mineichi Koga was a Japanese Marshal Admiral and commander-in-chief of the Imperial Japanese Navy's Combined Fleet.
The South West Pacific theatre, during World War II, was a major theatre of the war between the Allies and the Axis. It included the Philippines, the Dutch East Indies, Borneo, Australia and its mandate Territory of New Guinea and the western part of the Solomon Islands. This area was defined by the Allied powers' South West Pacific Area (SWPA) command.
The Pacific Ocean theater of World War II was a major theater of the Pacific War, the war between the Allies and the Empire of Japan. It was defined by the Allied powers' Pacific Ocean Area command, which included most of the Pacific Ocean and its islands, while mainland Asia was excluded, as were the Philippines, the Dutch East Indies, Borneo, Australia, most of the Territory of New Guinea, and the western part of the Solomon Islands.
The 1st Air Fleet, also known as the Kidō Butai, was a name used for a combined carrier battle group comprising most of the aircraft carriers and carrier air groups of the Imperial Japanese Navy (IJN) during the first eight months of the Pacific War.
The Central Pacific Area Fleet was a fleet of the Imperial Japanese Navy established during World War II.
The 5th Fleet was a fleet of the Imperial Japanese Navy, active during the early portions of the Second Sino-Japanese War, and again in World War II, primarily in the Aleutian campaign, during which it was augmented and designated the Northern Area Force.
The 4th Fleet was a fleet of the Imperial Japanese Navy. The Fourth Fleet designation was used during three separate periods. The initial designation was for a group of ships that were assigned to work together during the Russo-Japanese conflict and the period of its immediate aftermath. The second time the designation was used was during the Sino-Japanese conflict, and the third time was as a South Pacific area of command during the middle of the Pacific War.
The Southeast Area Fleet was a fleet of the Imperial Japanese Navy established during World War II.
Hokaze was a Minekaze-class destroyer, built for the Imperial Japanese Navy immediately following World War I. Advanced for their time, these ships served as first-line destroyers through the 1930s, but were considered obsolescent by the start of the Pacific War.
Itsukushima (厳島) was a medium-sized minelayer of the Imperial Japanese Navy, which was in service during the Second Sino-Japanese War and World War II. She was named after Itsukushima, a sacred island in Hiroshima Prefecture of Japan. She was the first warship in the Imperial Japanese Navy with all-diesel engine propulsion.
Tsugaru (津軽) was a large minelayer of the Imperial Japanese Navy that was in service during the early stages of World War II. She was named after the Tsugaru Peninsula in northwest Aomori Prefecture of Japan. She was commissioned immediately before the start of World War II, and sunk by the American submarine USS Darter in June 1944.
The Northeast Area Fleet was a fleet of the Imperial Japanese Navy established during World War II.
Shirataka was a medium-sized minelayer of the Imperial Japanese Navy, which was in service during the Second Sino-Japanese War and World War II. She was the world's first purpose-built anti-submarine netlayer. Also, unlike any other warship in the Japanese Navy, she had two chrysanthemum crests due to her unusual bow configuration.