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Imperial Japanese Army
Organization
Regular Infantry Division (Triangular)
8 December 1941
 
Regular Infantry Division (triangular)
 
Symbols Glossary
 
This depicts a typical organization. As can also be seen from the diagram above, actual organizations and equipment could vary from division by division. On paper, the triangular (three infantry regiment) Infantry Division had about 19,000 to 21,000 men. But the divisions were seldom as neat and tidy as this diagram. Elements were consistently being attached or detached, so that some divisions had as few as 14,000 men and some as others as many as 28,000.

The units in the divisions did not not always have the same size or configuration. A typical example would be the reconnaissance "regiment". In some divisions this was a cavalry-motorized unit, in others it was a battalion sized unit of horse cavalry, and in some divisions a reconnaissance element was missing altogether.

The artillery suffered similar variations being equipped with different types and numbers of guns, etc.

The size of the Transport Regiment also tended to vary, depending on the mission assigned to the division. The regiment itself could be issued with pack-horses, horse-drawn wagons and carts, or be partially or wholly equipped with motor vehicles.

 
Infantry Divisions (Triangular)
(Type) Division
     Comm  anding General
Raised Infantry Artillery Recon
Rgt
Engineer
Rgt
Transport Other
Units
Notes
(Type) Grp Inf Rgt Inf Rgt Inf Rgt (Type) Grp Art Rgt Equipment (Type) Rgt
(A)      1
     LTG Mitsuo NAKAZAWA
14.05.81 (A1) 1 1 49 57 (A2) 1 Fld 9  75mm  
18 105mm  
 9 150mm  
1 Recon (A1) 1 [1]
(A)      2
     LTG Masao MARUYAMA
14.05.81 (A1) 2 4 16 29 (A1) 2 Fld 18  75mm  
 9 150mm  
2 Recon 2 (A1) 2 2  
(A)      4
     LTG Norizo KITANO
14.05.81 (A1) 4 8 37 61 (A1) 4 Fld 24  75mm  
24 105mm  
4 Recon 4 (A1) 4 4  
(A)      6
     LTG Masatane KANDA
14.05.81 (A1) 6 13 23 45 (A1) 6 Fld 27  75mm   6 Recon 6 (A1) 6 6  
(A)      7
     LTG Gyoichi KOITO
19.10.86 (A1) 7 26 27 28 (A1) 7 Mtn 36  75mm   7 Recon 7 (A1) 7 7  
(A)      8
     LTG Masaki HONDA
01.10.88 (A1) 8 5 17 31 (A2) 8 8 Fld 12  75mm  
24 105mm  
12 150mm  
8 Recon 8 (A1) 8 8  
(A)     9
     LTG Kiichiro HIGUCHI
01.10.88 (A2) 9 7 19 35 (A1) 9 Mtn 36  75mm   9 Cav 9 (A2) 9 9  
(A)   10
     LTG Jiro SOGAWA
01.10.88 (A1) 10 10 39 63 (A2) 10 Fld 12  75mm  
24 105mm  
10 Recon 10 (A1) 10 10  
(A)   11
     LTG Takashi TAKAMORI
01.10.88 (A2) 11 12 43 44 (A1) 11 11 Mtn 36  75mm   11 Cav 11 (A2) 11 11  
(A)   12
     LTG Yukio KASAHARA
01.10.88 (A1) 12 24 46 48 (A2) 24 Fld 12  75mm  
 24 105mm  
12 Recon 18 (A1) 18 12 [2]
(A)   14
     LTG Mitsu KAWANAMI
06.07.05 (A1) 14 2 15 59 (A2) 14 20 Fld 12  75mm  
24 105mm  
12 150mm  
14 Recon 14 (A1) 14 14  
(A)   16
     LTG Susumu MORIOKA
18.07.05 (A1) 16 9 20 33 (A2) 22 Fld 36  75mm   16 Recon 16 (A1) 16 16 [3]
(A)   23
     LTG Kanji NISHIHARA
11.07.38 (A3) 23 64 71 72 (A3) 23 17 Fld 12  75mm  
12 150mm  
23 Recon 23 (A3) 23 23  
(A)   24
     LTG Mitsuru KAWANAMI
07.10.39 (A1) 24 22 32 89 (A2) 24 24 Fld 12  75mm  
12 105mm  
12 150mm  
24 Recon 24 (A1) 24 24  
(A)   25
     LTG Yaezo AKASHI
29.07.40 (A2) 25 14 40 70 (A2) 25 15 Mtn 12  75mm  
24 105mm  
12 150mm  
25 Cav 25 (A1) 25 25  
(A)   28
     LTG Taizo ISHIGURO
10.07.40 (A1) 28 3 30 36 (A2) 28 Mtn 24  75mm  
12 105mm  
28 Cav 28 (A1) 28 28  
(A)   29
     LTG Toshimichi UEMURA
01.04.41 (S) 38 50 (S) 29 Mtn 36  75mm   29 Cav 29 (S) 29 29  
(A)   48 (partially motorized)
     LTG Yuitsu TSUCHIHASHI
30.11.40 (A1) 48 1 Taiwan 2 Taiwan 47 (B) 48 Mtn 36  75mm  
12 105mm  
48 Recon 48 (S) 48 48 [4]
(A) Guards (motorized)
     LTG Takumaro NISHIMURA
03.06.40 (A1) Gds 3 Gds 4 Gds 5 Gds (A1) Gds Fld 24  75mm  
12 105mm  
Gds Recon Gds (A1) Gds Gds [5]
(Type) Division
     Comm  anding General
Raised Infantry Artillery Recon
Rgt
Engineer
Rgt
Transport Other
Units
Notes
(Type) Grp Inf Rgt Inf Rgt Inf Rgt (Type) Hqs Art Rgt Equipment (Type) Rgt
Notes:
Type (A) are regular, peacetime (activated) units.
Type (B) are depot (activated) units.
Type (S) are wartime (activated) units.
[1] Also: Tank Unit, 1st Division.
[2] But: 18th Transport Regiment.
[3] Each infantry regiment in the 16th Division had one motorized, one bicycle, and one foot battalion. Three of the four artillery battalions were motorized.
[4] One battalion of each infantry regiment of the 48th Division was bicycle mounted. One battalion of the artillery regiment was motorized.
[5] The Guards division 'motorized' division was equipped with 660 trucks. (A non-motorized divison had approximately 200 trucks.) The scarce trucks were for moving the heavy equipment and the artillery, and soldiers not allocated places in motor vehicles were issued bicycles.
 
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Infantry Regiment Infantry Regiment Infantry Regiment Field Artillery Regiment Field Artillery Regiment Mountain Artillery Regiment Mountain Artillery Regiment Cavalry Reconnaissance Regiment Cavalry-Mechanized Reconnaissance Regiment Engineer Regiment (Combat) Transport Regiment (Type A1) Transport Regiment (Type A2) Anti-Gas Unit Signal Unit Ordnance Maintenance Unit Medical Unit Veterinarian Hospital Infantry Regiment Infantry Regiment Infantry Regiment