Home Page World War II Armed Forces — Orders of Battle and Organizations Last Updated 06.06.2006
Imperial Japanese Army
Organization
1941 Infantry Division (square)
8 December 1941
 
Infantry Division (square)
 
Symbols Glossary
 
This depicts a typical organization. Actual organizations and equipment could vary from unit by unit. The square (four infantry regiment) infantry division was being gradually phased out by late 1941. On paper, this type of division had about 25,000 men. But the divisions were seldom as neat and tidy as the diagram above. Elements were consistently being attached or detached, so that some divisions had as few as 17,000 men and some as others as many as 32,000.

Also the divisions' own units did not not always have the same size or configuration. A typical e ample would be the cavalry "regiment". In some divisions (such as in the diagram above) this was a battalion sized unit of horse cavalry, in others it was a motorized unit with its own light tanks, [see Infantry Division (triangular)], or various combinations thereof. For e ample, the 5th Reconnaissance Regiment had 2 motorized infantry companies, 1 motorized HMG company, 1 motorized antitank company, and 2 tankette companies.

The artillery also suffered variations - in one case (19th Infantry Division) even having two regiments - some being equipped with different types and numbers of guns. The size of the Transport Regiment also tended to vary, depending on the mission assigned to the division, and whether the regiment itself was horse-drawn, partially or wholly motorized. For e ample, the transport "regiment" of the 18th Division had one horse-drawn company and three truck companies.

In the process of converting these divisions to the triangular (three infantry regiment) Organization, one brigade headquarters and an infantry regiment, (with the appropriate support units), might be withdrawn from the division and operate indepndently.

 
Infantry Divisions (Square)
Division
Commanding General
Infantry Artillery Recon
"Rgt"
Engineer
"Rgt"
Other
Units
Notes
Brig Rgts Brig Rgts Hqs Rgts Equipment
3
  LTG Fusataro TOYOSHIMA
5 6
68
29 18
34
3 Fld 36   75 3 Cav 3 3  
5 (motorized)
  LTG Masao WATANABE
9 11
41
21 21
42
5 Fld 24   75
12 105
5 Recon 5 5 (1)(3)
13
  LTG Eitaro UCHIYAMA
26 58
116
103 65
104
19 Mtn 36   75 13 Cav 13 13  
18 (motorized)
  LTG Renya MATAGUCHI
23 55
56
35 114
124
18 Mtn 36   75 22 Recon 12 18 (2)(3)
19
  LTG Yoshio KOZUKI
37 73
74
38 75
76
19 15 Fld
25 Mtn
  8 150
36   75
19 Recon 19 19  
20
  LTG Hisashige NAGATSU
39 77
78
40 79
80
20 26 Fld 36   75 20 Recon 20 20  
110
  LTG Mamoru IINUMA
108 139
140
133 110
163
110 Fld 36   75 110 Cav 110 110  
116
  LTG Toshijiro KEUCHI
119 109
120
130 133
138
122 Fld 36   75 120 Cav 116 116  
Notes:
   (1) But: 2nd Epidemic And Water Supply Department. Included the Tank Unit, 5th Division.
   (2) 35th Infantry Brigade with 124th Infantry Regiment operated independently as "Kawaguch1 Detachment", and was still at Camranh Bay.
   (3) Only the 5th and 18th divisions were "motorized" square divisions, being equipped with 500 trucks each. The trucks were for the heavy
         equipment and the artillery, whereas every soldier not riding in a motor vehicle rode a bicycle.
 
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