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
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
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
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.
Transcribed and formatted for HTML by Jerry Holden for the HyperWar Foundation