The was the main sea-going component of the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrend ...

. 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.

History

Sino-Japanese War (1894–95)

The Combined Fleet was formally created for the first time on 18 July 1894 by the merger of the

Standing Fleet The was a fleet of the Imperial Japanese Navy. It was the main combat fleet of the Japanese Navy and formed the core of a wartime Combined Fleet organization. It was created from the Standing Small-Fleet in 1889. It was split into the 1st Fle ...

and the Western Fleet. The Standing Fleet (also known as the Readiness Fleet) contained the navy's most modern and combat-capable warships. The Western Fleet was a reserve force consisting primarily of obsolete ships deemed unsuitable for front-line combat operations, but still suitable for commerce protection and coastal defense. Vice-admiral

Itō Sukeyuki Marshal-Admiral Count (20 May 1843 – 16 January 1914) was a Japanese career officer and admiral in the Imperial Japanese Navy in Meiji-period Japan. Biography Born in what is now part of Kagoshima City as the son of a ''samurai'' of the ...

was appointed the first Commander-in-Chief of the Combined FleetFleet''
/ref> for the duration of the

first Sino-Japanese War The First Sino-Japanese War (25 July 1894 – 17 April 1895) was a conflict between China and Japan primarily over influence in Korea. After more than six months of unbroken successes by Japanese land and naval forces and the loss of the ...

against China.

Russo-Japanese War (1904–05)

The Combined Fleet was re-formed during the

Russo-Japanese War The Russo-Japanese War ( ja, 日露戦争, Nichiro sensō, Japanese-Russian War; russian: Ру́сско-япóнская войнá, Rússko-yapónskaya voyná) was fought between the Empire of Japan and the Russian Empire during 1904 and 1 ...

of 1904–05 to provide a unified overall command for the three separate fleets in the Imperial Japanese Navy. The

IJN 1st Fleet The was the main battleship fleet of the Imperial Japanese Navy. History First established on 28 December 1903, the IJN 1st Fleet was created during the Russo-Japanese War when the Imperial General Headquarters divided the Readiness Fleet in ...

was the main battleship force, which formed the backbone of the navy and was intended to be used in a traditional

line of battle The line of battle is a tactic in naval warfare in which a fleet of ships forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for dates ranging from 1502 to 1652. Line-of-battle tacti ...

showdown with an equivalent enemy battleship fleet ('' kantai kessen''). The

IJN 2nd Fleet The was a fleet of the Imperial Japanese Navy (IJN) created as a mobile strike force in response to hostilities with Russia, and saw action in every IJN military operation until the end of World War II. History Established on 27 October 1903, ...

was a fast, mobile strike force with

armored cruiser The armored cruiser was a type of warship of the late 19th and early 20th centuries. It was designed like other types of cruisers to operate as a long-range, independent warship, capable of defeating any ship apart from a battleship and fast eno ...

s and

protected cruiser Protected cruisers, a type of naval cruiser of the late-19th century, gained their description because an armoured deck offered protection for vital machine-spaces from fragments caused by shells exploding above them. Protected cruisers re ...

s. The

IJN 3rd Fleet The was a fleet of the Imperial Japanese Navy (IJN), which was created, and subsequently disbanded on six separate occasions and revived on five separate occasions. =History= Russo-Japanese War First established on 28 December 1903, the 3rd Fl ...

was primarily a reserve fleet of obsolete vessels considered too weak for front-line combat service, but which could still be used in the operation to blockade Port Arthur. Admiral

Tōgō Heihachirō Marshal-Admiral Marquis , served as a '' gensui'' or admiral of the fleet in the Imperial Japanese Navy and became one of Japan's greatest naval heroes. He claimed descent from Samurai Shijo Kingo, and he was an integral part of preserving ...

was commander-in-chief of the Combined Fleet during the Russo-Japanese War.

Interwar years

The Combined Fleet was not maintained as a permanent organization, but was temporarily created when necessary during fleet maneuvers or when called for by extraordinary circumstances. Thus, during the period from 1905 to 1924, the Combined Fleet was created only sporadically as the occasion or circumstances dictated, and disbanded immediately afterwards. In 1924, the Imperial Japanese Navy declared in an edict on fleet organization that "for the time being" the Combined Fleet would be a standing organization consisting of the IJN 1st Fleet and IJN 2nd Fleet. As this was not intended to be "permanent" and since the commander of IJN 1st Fleet concurrently directed the Combined Fleet, the Combined Fleet was not given a Headquarters staff of its own. From 1933, with the Mukden Incident and the increasing tension with China, a permanent HQ staff for the Combined Fleet was established. By the late 1930s, it included most of Japan's warships—only the base units, the

Special Naval Landing Forces The Special Naval Landing Forces (SNLF; ja, 海軍特別陸戦隊, Kaigun Tokubetsu Rikusentai) were naval infantry units of the Imperial Japanese Navy (IJN) and were a part of the IJN Land Forces. They saw extensive service in the Second Sino ...

, and the China Area Fleet lay outside the Combined Fleet.

World War II

The Combined Fleet came under direct command of the Imperial General Headquarters in 1937. With the start of the Pacific War with the

attack on Pearl Harbor The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii ...

carried out by Combined Fleet's ''Kido Butai'' (

1st Air Fleet The , also known as the ''Kidō Butai'' ("Mobile Force"), 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 ...

), the Combined Fleet became almost synonymous with the Imperial Japanese Navy, under the command of admiral

Isoroku Yamamoto was a Marshal Admiral of the Imperial Japanese Navy (IJN) and the commander-in-chief of the Combined Fleet during World War II until he was killed. Yamamoto held several important posts in the IJN, and undertook many of its changes and reor ...

till April 1943 when he died after his plane was shot-down by US air forces over Bougainville Island. It comprised the battleships, aircraft carriers,

aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engine ...

, and the components that made up the main fighting strength of the IJN. It was first mobilized on the whole for the

Battle of Midway The Battle of Midway was a major naval battle in the Pacific Theater of World War II that took place on 4–7 June 1942, six months after Japan's attack on Pearl Harbor and one month after the Battle of the Coral Sea. The U.S. Navy under ...

. After the devastating carrier losses at Midway and in the

Solomon Islands campaign The Solomon Islands campaign was a major campaign of the Pacific War of World War II. The campaign began with Japanese landings and occupation of several areas in the British Solomon Islands and Bougainville, in the Territory of New Guinea, ...

, the navy re-organized into a number of "Area Fleets" for local operational control of various geographic zones. The Combined Fleet then evolved into more of an administrative organization. As the war situation deteriorated for the Japanese and the territories controlled by the "Area Fleets" fell one after another to the

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

, the Imperial General Headquarters and the

Imperial Japanese Navy General Staff The was the highest organ within the Imperial Japanese Navy. In charge of planning and operations, it was headed by an Admiral headquartered in Tokyo. History Created in 1893, the Navy General Staff took over operational (as opposed to adminis ...

acted to force the American fleet into a "decisive battle" in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

per the '' kantai kessen'' philosophy. In the resultant

Battle of the Philippine Sea The Battle of the Philippine Sea (June 19–20, 1944) was a major naval battle of World War II that eliminated the Imperial Japanese Navy's ability to conduct large-scale carrier actions. It took place during the United States' amphibious invas ...

and the Battle of Leyte Gulf the Japanese fleet was severely depleted. The remnants of the Combined Fleet fled to

Okinawa is a prefecture of Japan. Okinawa Prefecture is the southernmost and westernmost prefecture of Japan, has a population of 1,457,162 (as of 2 February 2020) and a geographic area of 2,281 km2 (880 sq mi). Naha is the capital and largest city ...

, but further operations were hindered by lack of fuel and air cover. By the time of the final suicide mission of the battleship ''Yamato'' in

Operation Ten-Go , also known as Operation Heaven One (or Ten-ichi-gō 天一号), was the last major Japanese naval operation in the Pacific Theater of World War II. The resulting engagement is also known as the Battle of the East China Sea. In April 1945, t ...

, the Combined Fleet had ceased to exist as an effective combat force.

Commander-in-Chief (司令長官, ''Shireichōkan'')

Chief of Staff (参謀長, ''Sanbōchō'')

Footnotes

References

Notes

Books

* *

External links

* *
War II Armed Forces – Orders of Battle and Organizations''Nihon Kaigun
{{IJN Fleets of the Imperial Japanese Navy Military units and formations established in 1894 Military units and formations disestablished in 1945