Imperial Japanese Army
Organization Regular Infantry Division (Triangular) 8 December 1941 
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 cavalrymotorized 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 packhorses, horsedrawn wagons and carts, or be partially or wholly equipped with motor vehicles. 
Infantry Divisions (Triangular)  
(Type)  Division
Commanding 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 nonmotorized 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.
