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The term Army ( gun?) in the Imperial Japanese Army was used in a different ways to designate a variety of large military formations, corresponding to the army group, field army and corps in the militaries of western nations.

General Armies[edit | edit source]

Kwantung Army on maneuvers

The General Army (総軍 Sō-gun?) was the highest level in the organizational structure of the Imperial Japanese Army. It corresponded to the army group in western military terminology. Intended to be self-sufficient for indefinite periods, the general armies were commanded by either a field marshal or a full general. The initial General Army was the Japanese Manchurian Army, formed from 1904–1905 during the Russo-Japanese War as a temporary command structure to coordinate the efforts of several Japanese armies in the campaign against Imperial Russia.

In terms of a permanent standing organization, the Japanese Army created the Kantōgun, usually known in English as the Kwantung Army, to manage its overseas deployment in the Kwantung Territory and Manchukuo from 1906.

Subsequent general armies were created in response to the needs of the Second Sino-Japanese War and World War II, in which increased overseas deployment called for an organizational structure that could respond quickly and autonomously from the Imperial Japanese Army General Staff in Tokyo. As a result, Japanese forces were re-organized into three separate overseas operational commands: (Manchuria, China and Southeast Asia), with the Japanese home islands forming a fourth.

Towards the end of World War II, the home island command (i.e. the General Defense Command) was restructured geographically into the First General Army in the east, Second General Army in the west, and the Air General Army in charge of military aviation.

With the official Japanese surrender in September 1945, all of the general armies were dissolved, except for the First General Army, which continued to exist until November 30, 1945 as the 1st Demobilization Headquarters.

Name Active Operational Area
1 Kwantung Army (関東軍 Kantōgun?) 1906–1945 Manchukuo
2 China Expeditionary Army (支那派遣軍 Shina hakengun?) 1939–1945 China
3 Southern Expeditionary Army Group (南方軍 Nampōgun?) 1941–1945 Southeast Asia, Southwest Pacific
4 General Defense Command (防衛総司令部 Bōei Sōshireibu?) 1941–1945 Japanese home islands
5 First General Army (第1総軍 Dai-ichi Sōgun?) 1945-1945 Japanese home islands
6 Second General Army (第2総軍 Dai-ni Sōgun?) 1945-1945 Japanese home islands
7 Air General Army ( 航空総軍 Kōkū Sōgun?) 1945-1945 Japanese home islands

Area Armies[edit | edit source]

Area Armies (方面軍 Hōmen-gun?) in Japanese military terminology were equivalent to field armies in western militaries. Area Armies were normally commanded by a lieutenant general. There is much confusion between the similarly numbered Area Armies and Armies in historical records, as many writers often did not make a clear distinction when describing the units involved.

Name Active Operational Area
1 First Area Army ( 第1方面軍 Dai ichi hōmen gun?) 1942–1945 Manchukuo
2 Second Area Army ( 第2方面軍 Dai ni hōmen gun?) 1942–1945 Manchukuo
3 Third Area Army ( 第3方面軍 Dai san hōmen gun?) 1942–1945 Manchukuo
4 Fifth Area Army ( 第5方面軍 Dai go hōmen gun?) 1944–1945 Japanese home islands
5 Sixth Area Army ( 第6方面軍 Dai roku hōmen gun?) 1944–1945 China
6 Seventh Area Army ( 第7方面軍 Dai nana hōmen gun?) 1944–1945 British Malaya, Singapore, Sumatra
7 Eighth Area Army ( 第8方面軍 Dai hachi hōmen gun?) 1942–1945 Solomon Islands, New Guinea
8 Tenth Area Army ( 第10方面軍 Dai jyū hōmen gun?) 1944–1945 Taiwan
9 Eleventh Area Army ( 第11方面軍 Dai jyū ichi hōmen gun?) 1945-1945 Japanese home islands
10 Twelfth Area Army ( 第12方面軍 Dai jyū ni hōmen gun?) 1945-1945 Japanese home islands
11 Thirteenth Area Army ( 第13方面軍 Dai jyū san hōmen gun?) 1945-1945 Japanese home islands
12 Fourteenth Area Army ( 第14方面軍 Dai jyū yon hōmen gun?) 1942–1945 Philippines
13 Fifteenth Area Army ( 第15方面軍 Dai jyū go hōmen gun?) 1945-1945 Japanese home islands
14 Sixteenth Area Army ( 第16方面軍 Dai jyū roku hōmen gun?) 1945-1945 Japanese home islands
15 Seventeenth Area Army ( 第17方面軍 Dai jyū nana hōmen gun?) 1945-1945 Korea
15 Eighteenth Area Army ( 第18方面軍 Dai jyū hachi hōmen gun?) 1943–1945 Thailand
16 Burma Area Army ( 緬甸方面軍 Biruma hōmen gun?) 1943–1945 Burma
17 Central China Area Army ( 中支那方面軍 Naka-Shina hōmen gun?) 1937–1938 China
18 Northern China Area Army ( 北支那方面軍 Kita-Shina hōmen gun?) 1937–1945 China
19 Southern China Area Army ( 南支那方面軍 Minami-Shina hōmen gun?) 1940–1941 China
19 Northern District Army ( 北部軍 Hokubu gun?) 1940–1945 Japanese home islands
20 Eastern District Army ( 東部軍 Tobu gun?) 1923–1945 Japanese home islands
22 Western District Army (西部軍 Seibu gun?) 1937–1945 Japanese home islands
21 Central District Army (中部軍 Chubu gun?) 1945-1945 Japanese home islands
22 Shanghai Expeditionary Army (上海派遣軍 Shanhai Haken gun?) 1932, 1937–1938 China

Armies[edit | edit source]

The Japanese Army ( gun?) corresponded to an army corps in American or British military terminology. It was usually commanded by a lieutenant general.

Auxiliaries[edit | edit source]

References[edit | edit source]

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