Appendix V
Japanese Order of Battle¹

ARMY UNITS
Unit		Strength
Thirty-second Army Troops
	Headquarters	1,070
	Ordnance Depot	1,498
	Ordnance Duty Unit	150
	Field Freight Depot	1,167
	36th Signal Regiment	1,912
	Okinawa Army Hospital	204
	27th Field Water Purification Unit	244
	Well Digging Unit	34
	Defense Construction Unit	108
	7th Fortress Construction Duty Company	322
	2d Field Construction Duty Company	366
24th Infantry Division
	Headquarters	267
	22d Infantry Regiment	2,796
	32d Infantry Regiment	2,870
	89th Infantry Regiment	2,809
	42d Field Artillery Regiment	2,321
	24th Reconnaissance Regiment	346
	24th Engineer Regiment	777
	24th Transport Regiment	1,158
	Signal Unit	275
	Decontamination Training Unit	77
	Ordnance Repair Unit	57
	Veterinary Hospital	11
	Water Supply and Purification Unit	241
	1st Field Hospital	174
	2d Field Hospital	181
62d Infantry Division
	Headquarters	65
	63d Brigade Headquarters	129
	11th Independent Infantry Battalion	1,091
	12th Independent Infantry Battalion	1,085
	13th Independent Infantry Battalion	1,058
	14th Independent Infantry Battalion	1,085
	273d Independent Infantry Battalion	683
	64th Brigade Headquarters	121
	15th Independent Infantry Battalion	1,076
	21st Independent Infantry Battalion	1,080
	22d Independent Infantry Battalion	1,071
	23d Independent Infantry Battalion	1,089
	272d Independent Infantry Battalion	683
	Engineer Unit	255
	Signal Unit	359
	Transport Unit	300
	Field Hospital	371
	Veterinary Hospital	22
	44th Independent Mixed Brigade Headquarters	63
	2d Infantry Unit	2,046
	15th Independent Mixed Regiment	1,885
	Artillery Unit	330
	Engineer Unit	161
	5th Artillery Command Headquarters	147
	1st Medium Artillery Regiment (-)	856
	23d Medium Artillery Regiment	1,143
	7th Heavy Artillery Regiment	526
	100th Independent Heavy Artillery Battalion	565
	1st Independent Artillery Mortar Regiment (-)	613
	1st Light Mortar Battalion	633
	2d Light Mortar Battalion	615

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Unit		Strength
21st Antiaircraft Artillery Command
	Headquarters	71
	27th Independent Antiaircraft Artillery Bn	505
	79th Field Antiaircraft Artillery Battalion	513
	80th Field Antiaircraft Artillery Battalion	517
	81st Field Antiaircraft Artillery Battalion	514
	103d Independent Machine Cannon Battalion	336
	104th Independent Machine Cannon Battalion	338
	105th Independent Machine Cannon Battalion	337
Machine Gun Units
	3d Independent Machine Gun Battalion	340
	4th Independent Machine Gun Battalion	344
	14th Independent Machine Gun Battalion	334
	17th Independent Machine Gun Battalion	331
Antitank Units
	3d Independent Antitank Battalion	363
	7th Independent Antitank Battalion	353
	22d Independent Antitank Battalion	402
	32d Independent Antitank Company	144
11th Shipping Group
	Headquarters	100
	7th Shipping Engineer Branch Depot	600
	23d Shipping Engineer Regiment	850
	26th Shipping Engineer Regiment (-)	550
	5th Sea Raiding Base Headquarters	42
	1st Sea Raiding Squadron	104
	2d Sea Raiding Squadron	104
	3d Sea Raiding Squadron	104
	26th Sea Raiding Squadron	104
	27th Sea Raiding Squadron	104
	28th Sea Raiding Squadron	104
	29th Sea Raiding Squadron	104
	1st Sea Raiding Base Battalion	886
	2d Sea Raiding Base Battalion	874
	3d Sea Raiding Base Battalion	877
	26th Sea Raiding Base Battalion	908
	27th Sea Raiding Base Battalion	897
	28th Sea Raiding Base Battalion	900
	29th Sea Raiding Base Battalion	900
49th Line of Communication Sector
	Headquarters	202
	72d Land Duty Company	508
	83d Land Duty Company	496
	103d Sea Duty Company	711
	104th Sea Duty Company	724
	215th Independent Motor Transport Company	181
	259th Independent Motor Transport Company	182
Engineer Units
	66th Independent Engineer Battalion	865
	14th Field Well Drilling Company	110
	20th Field Well Drilling Company	110
19th Air Sector Command
	Headquarters	41
	29th Field Airfield Construction Battalion	750
	44th Airfield Battalion	377
	50th Airfield Battalion	360
	56th Airfield Battalion	380
	3d Independent Maintenance Unit	120
	Makoto 1st Maintenance Company	90
	118th Independent Maintenance Unit	100
	6th Fortress Construction Duty Company	330
	Detachment, 20th Air Regiment	27
	10th Field Meteorological Unit	80
	26th Air-Ground Radio Unit	117
	46th Independent Air Company	132
	1st Branch Depot, 5th Field Air Repair Depot	130
	21st Air Signal Unit	310
	Okinawa Branch, Army Air Route Department	359
	223d Specially Established Garrison Company	200
	224th Specially Established Garrison Company	200
	225th Specially Established Garrison Company	200
	27th Tank Regiment	750
	Army Unit Total	266,636
NAVY UNITS
Okinawa Base Force (Headquarters, Coast Defense, and Antiaircraft Personnel)		3,400
27th Motor Torpedo Boat Squadron		200
33d Midget Submarine Unit		130
37th Torpedo Maintenance Unit		140
Torpedo Working Unit		130
81mm Mortar Battery		150
Oroku Transmitting Station		30
Naha Branch, Sasebo Naval Stores Department		136
Naha Branch, Sasebo Transportation Department		136
Naha Navy Yard, Sasebo Naval Base		53
Oroku Detachment, 951st Air Group		600
Nansei Shoto Air Group		2,000
226th Construction Unit		1,420
3210th Construction Unit		300
	Navy Unit Total	38,825
OKINAWAN
502d Special Guard Engineer Unit		900
503d Special Guard Engineer Unit		700
504th Special Guard Engineer Unit		700
Blood-and-Iron-For-The-Emperor-Duty-Unit		750
Boeitai Assigned to the Army		16,600
Boeitai Assigned to the Navy		1,100

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Unit		Strength
Students		600
Regular Conscripts Not Included Under Army Units		2,000
	Okinawan Total	23,350
	Grand Total (Rounded Out)
	Army Units	67,000
	Navy Units	9,000
	Okinawans	24,000
	Japanese Strength On Okinawa	4100,000

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Footnotes

1. The order of battle is based on a listing compiled by Tenth Army G-2 contained in IntelMono, Part I, Sect B, Chap II, 3. Obvious discrepancies in this list have been corrected with the aid of POW InterrSum Nos 1-19 and CICAS Trans No 212, Extracts from 32d Army Order of Battle, mid-March 1945. Units are listed by their original designation with the strengths they are believed to have had just prior to the American landings.

2. This figure represents the total Japanese strength. Included in it, however, are an estimated 5,000 Okinawans, mostly regular conscripts, who were integrated into Japanese units.

3. This total represents both regular naval ratings and the Japanese, Korean, and Okinawan military civilians who were utilized in the naval land combat organization.

4. Final figures have been rounded out to avoid the appearance of exactness. Thirty-second Army's peak combat strength may have been anywhere between 95,000 and 105,000.

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