10th Area Fleet (Imperial Japanese Navy)
The commander in chief of the 1st Southern Expeditionary Fleet based in Singapore was named commander in chief of the newly created Tenth Area Fleet on 1 February 1944. As the Southwest Area Fleet command staff was isolated in the Philippines, a new command structure was necessary to direct the 1st and 2nd Southern Expeditionary Fleets and surviving elements of the IJN 5th Fleet. It was supported by the IJN 13th Air Fleet. The 10th Area Fleet had responsibility for the defenses of Indonesia and Indochina. It lost most of its combat capability at the Battle of the Malacca Strait and when Ashigara was sunk by HMS Trenchant and was disbanded at the end of the Pacific War.
The Tenth Area Fleet was a theatre command; however, its name was taken sequentially from the numbered fleets rather than from the area in which it was located.
Structure of the IJN 10th Area Fleet
|Date||Higher unit||Lower units|
|5 February 1945 (original)||Combined Fleet||1st Southern Expeditionary Fleet, 2nd Southern Expeditionary Fleet, 13th Air Fleet,
5th Cruiser Division, Auxiliary survey ship Hakusa, Auxiliary gunboat Nankai
|1 June 1945||1st Southern Expeditionary Fleet, 2nd Southern Expeditionary Fleet, 13th Air Fleet,
5th Cruiser Division, Auxiliary gunboat Nankai, No.27 Special Base Force, No.25 Base Force, No.28 Base Force
|12 September 1945||Surrendered to United Kingdom in Singapore.|
Commanders of the IJN 10th Area Fleet
Commander in chief 
|1||Vice-Admiral||Shigeru Fukudome||5 Feb 1945 - Sep 1945||Commander of the 1st Southern Expeditionary Fleet and the 13th Air Fleet|
Chief of staff
|1||Rear-Admiral||Bunji Asakura||5 Feb 1945 - Sep 1945||Chief of staff of the 1st Southern Expeditionary Fleet and the 13th Air Fleet|
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