50th Infantry Regiment--Colonel Kiyochi, Ogata.2 Headquarters, 50th Infantry Regiment 60 1st Battalion, 50th Infantry Regiment - Captain Matsuda 880 2d Battalion, 50th Infantry Regiment - Captain Kamityama 880 3d Battalion, 50th Infantry Regiment - Captain Yamamoto 880 Artillery Battalion, 50th Infantry Regiment - Major Kahi 360 Communication Company, 50th Infantry Regiment - Lieutenant Hayashi 141 Engineer Company, 50th Infantry Regiment - Lieutenant Yano 169 Supply Company, 50th Infantry Regiment - Lieutenant Nozaki 200 Medical Company, 50th Infantry Regiment - Lieutenant Narizawa 130 Antitank Platoon, 50th Infantry Regiment - Lieutenant Otani 42 Fortification Detachment, 50th Infantry - Captain Hiruma 60 Detachment, 29th Field Hospital - Captain Hayashi 200 Platoon, 164th Independent Vehicle Company 60 Tank Company, 18th Infantry Regiment - Lieutenant Shikamura 90 1st Battalion, 135th Infantry Regiment3 - Captain Izumi 900 ------ Total Army 5,052 Navy Units4 56th Naval Guard Force (Keibitai) - Captain Goichi Oya 1,400 233d Construction Battalion, 56th Keibitai 600 23d Air Group 450 Hospital, 523d Air Group 60 Construction Battalion, 523d Air Group 400 Headquarters, 1st Air Fleet - Vice Admiral Kakuda 200 833d Construction Battalion 400 116th Construction Battalion 400 Naval air stragglers 200 ------ Total Navy 4,110 Grand Total 9,162
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1. No two sources consulted gave exactly the same numbers of Japanese at Tinian. Figures, therefore, are only reconciled approximations.
2. Colonel Ogata was also Tinian Island Commander, a job he performed under administrative control of the Northern Marianas Group with headquarters on Saipan. After Saipan's fall, Ogata's command came under the 29th Division on Guam.
3. The other two battalions of the 135th Infantry Regiment participated in the defense of Saipan.
4. Japanese Navy Units were generally more security conscious than were Army units; therefore, the order of battle for Navy units at Tinian is much less detailed and less accurate than that for Army forces.