ESTIMATED ENEMY STRENGTH AT IWO JIMA
ON 19 FEBRUARY 1945
Army Units 109th Division--Lieutenant General Tadamichi Kurabayashi1 109th Division Headquarters and Signal Company 300 109th Division Antiaircraft Artillery Battalion--Major Azuma 310-340 2d Mixed Brigade--Major General Senda 5,100-5,200 309th Independent Infantry Battalion--Captain Awatsu 310th Independent Infantry Battalion--Major Iwatani 311th Independent Infantry Battalion--Major Tatsumi 312th Independent Infantry Battalion--Captain Osada 314th Independent Infantry Battalion--Captain Hakuda Artillery Battalion, 2d Mixed Brigade--Major Maeda Engineer Battalion, 2d Mixed Brigade--Major Mackawa Field Hospital, 2d Mixed Brigade--commander not show. 14th Infantry Regiment--Colonel Ikeda 2,200-2,400 1st Battalion, 145th Regiment--Major Hara 2d Battalion, 145th Regiment--Major Yasutake 3d Battalion, 145th Regiment--Major Anso Artillery Battalion, 145th regiment--Captain Masuda Engineer Company, 145th Regiment--commander not shown Field Hospital, 145th Regiment--commander not shown 3d Battalion, 17th Independent Mixed Regiment--Captain Shimotsuma 550 26th Tank Regiment--Lieutenant Colonel Nishi 500-600 20th Independent Artillery Mortar Battalion (Reinforced)--Captain Mizuashi 800 2d Medium Mortar Battalion (Reinforced)--Major Nakao 700 3d Medium Mortar Battalion (Reinforced)--Major Kobayashi 500 1st and 2d Independent Machine Gun Battalions 600 1st Independent Machine Gun Battalion--Captain Kawana 2d Independent Machine Gun Battalion--Captain Kawasaki Independent Antitank Battalions 1,250 8th Independent Antiitank Battalion--Captain Shimizu 9th Independent Antitank Battalion--Major Okubo 10th Independent Antitank Battalion--Major Matsushita 11th Independent Antitank Battalion--Captain Node 12th Independent Antitank Battalion--Captain Hayauchi Army Rocket Unit (three companies) 150-220 1st Company, 1st Mixed Brigade Engineer Unit; 5th Fortress Construction Duty Company; 21st Well Drilling Unit; Detachment, Shipping Engineers 300 Special Machine Cannon Units 250-300 20th Special Machine Cannon Unit (with Naval Guard Force)--2dLt Momozaki 21st Special Machine Cannon Unit (with Naval Guard Force)--2dLt Kondo 43d Special Machine Cannon Unit (with 109th Division AA Artillery)--1stLt Tamara 44th Special Machine Cannon Unit (with 109th Division AA Artillery)--commander not shown
Navy Units Naval Forces on Iwo Jima (over-all command)--Rear Admiral Ichimaru 27th Air Flotilla and 2d Air Attack Force--Rear Admiral Ichimaru Iwo Jima Naval Guard Force--Captain Inoue Naval Guard Force Antiaircraft Batteries2 2,400 125th Antiaircraft Defense Unit--Lt(jg) Tamura 132d Antiaircraft Defense Unit--Ensign Okumura 149th Antiaircraft Defense Unit--commander no known 141st Antiaircraft Defense Unit--Lt(jg) Doi Naval Guard Force Coast Defense Batteries 640 Nanpo Air Group naval Land Force--Captain Inoue Southern Air Group Naval Guard Force troops, construction personnel, technicians) 2,250 204th Naval Construction Battalion--Lt Iida 1,410 Technical Air Personnel 320 Total Japanese troops on Iwo Jima, 19Feb453 20,530-21,060
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1. General Kuribayashi also commanded the Ogasawara Army Group and held over-all command of the defense of Iwo Jima. Footnotes
2. The 125th, 132d, 141st, 149th Naval Antiaircraft Defense Units were disbanded and reorganized into the Iwo Jima Naval Guard Force prior to 19Feb45. VAC IntelRpt, Encl A.
3. Ibid., 14.