Fourth Carrier Division
Encyclopedia
The was a seaplane tender
Seaplane tender
A seaplane tender is a ship that provides facilities for operating seaplanes. These ships were the first aircraft carriers and appeared just before the First World War.-History:...

 and aircraft carrier
Aircraft carrier
An aircraft carrier is a warship designed with a primary mission of deploying and recovering aircraft, acting as a seagoing airbase. Aircraft carriers thus allow a naval force to project air power worldwide without having to depend on local bases for staging aircraft operations...

 unit of the Imperial Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

's Combined Fleet
Combined Fleet
The was the main ocean-going component of the Imperial Japanese Navy. The Combined Fleet was not a standing force, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units normally under separate commands in peacetime....

.

Organization

Date Higher unit Ships and air units
1 December 1937 (original) Combined Fleet
Combined Fleet
The was the main ocean-going component of the Imperial Japanese Navy. The Combined Fleet was not a standing force, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units normally under separate commands in peacetime....

 
Notoro, Kinugasa Maru
1 August 1938 disbanded
1 April 1941 1st Air Fleet
1st Air Fleet of the Imperial Japanese Navy
The Imperial Japanese Navy at the beginning of World War II contained the world's largest carrier fleet. At the centre, was the 1st Air Fleet which was a grouping of naval aircraft and aircraft carriers...

 
Ryūjō
Japanese aircraft carrier Ryujo
Ryūjō was a light aircraft carrier of the Imperial Japanese Navy. She was laid down by Mitsubishi at Yokohama in 1929, launched in 1931 and commissioned on 9 May 1933. Her final design resulted in a top-heavy unstable vessel and within a year she was back at Kure Naval Yard for modification...

11 August 1941 Ryūjō, Destroyer Division 3 : Shiokaze
Japanese destroyer Shiokaze
was a 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.-History:...

, Hokaze
Japanese destroyer Hokaze
was a 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.-History:...

10 December 1941 Ryūjō, Kasuga Maru (Taiyō)
Japanese aircraft carrier Taiyo
Taiyō was the lead ship of Taiyō-class of escort carrier operated by the Imperial Japanese Navy in World War II.-Construction and Conversion:...

, Destroyer Division 3 : Shiokaze, Hokaze
1 April 1942 Ryūjō, Shōhō
Japanese aircraft carrier Shoho
Shōhō , the lead ship of her class, was a light aircraft carrier of the Imperial Japanese Navy during World War II...

3 May 1942 Ryūjō, Shōhō, Jun'yō
20 May 1942 Ryūjō, Jun'yō
14 July 1942 disbanded
1 May 1944 3rd Fleet
IJN 3rd Fleet
The was a fleet of the Imperial Japanese Navy, which was created on six separate occasions.-Russo-Japanese War:First established on 28 December 1903, the IJN 3rd Fleet was created by the Imperial General Headquarters as an administrative unit to manage various vessels considered too obsolete for...

 
Hyūga
Japanese battleship Hyuga
Hyūga , named for Hyūga Province in Kyūshū, was an of the Imperial Japanese Navy laid down by Mitsubishi on 6 May 1915, launched on 27 January 1917 and completed on 30 April 1918. She was initially designed as the fourth ship of the , but was heavily redesigned to fix shortcomings...

, Ise
Japanese battleship Ise
, was the lead ship of the two-vessel Ise-class battleship of the Imperial Japanese Navy, which saw combat service during the Pacific War. Ise was named after Ise Province, one of the traditional provinces of Japan, now part of Mie Prefecture....

, 634th Naval Air Group
15 October 1944 Jun'yō, Ryūhō
Japanese aircraft carrier Ryuho
The was a Japanese Light aircraft carrier. Sole ship of her class, she was converted from a submarine tender. During World War II she operated mainly as aircraft transport but did participate in the First Battle of the Philippine Sea.-Conversion and commission:...

, Hyūga, Ise
(24 October 1944) Hyūga, Ise
15 December 1944 2nd Fleet
IJN 2nd Fleet
The was a fleet of the Imperial Japanese Navy.-History:First established on 28 December 1903, the IJN 2nd Fleet was created by the Imperial General Headquarters as a mobile strike force of cruisers and destroyers to pursue the Imperial Russian Navy's Vladivostok-based cruiser squadron while the...

 
Hyūga, Ise
1 March 1945 disbanded

Commander

Rank Name Date
1 R.ADM Tomoshige Samejima
Tomoshige Samejima
-Notes:...

 
1 December 1937
x disbanded 1 August 1938
x vacant post 1 April 1941
2 R.ADM Torao Kuwabara  10 April 1941
3 R.ADM Kakuji Kakuta
Kakuji Kakuta
, was an admiral in the Imperial Japanese Navy during World War II. He is noted for his role in commanding Japanese naval aviation units in the Pacific War.-Biography:...

 
1 September 1941
x disbanded 14 July 1942
4 R.ADM Chiaki Matsuda 1 May 1944
x disbanded 1 March 1945
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