Appendix G: Japanese Order of Battle in Eastern Mindanao
G-1: 100th Division, 17 April 1945
Davao District Unit (Lt. Gen. Jiro Harada, Commanding General, 100th Division)
100th Division Headquarters Unit
Headquarters, 100th Division
167th Independent Infantry Battalion, less two companies
3rd Company, 163rd Independent Infantry Battalion
100th Division Transportation Unit
1st Field Hospital, 30th Division, less elements
13th Army Hospital
Elements, 35th Army Signal Unit
Elements, 35th Army Information Section
Elements, Provisional Chemical Unit
Elements, 14th Area Army Field Freight Depot
Special Tank Platoon (U.S. light tanks)
Davao Coast Artillery Unit
Davao Line of Communications Squadron
2nd Provisional Construction Duty Company
100th Division Signal Unit
100th Division Artillery Unit, less one battery
100th Division Engineer Unit, less five companies
Right Sector Unit (Maj. Gen. Ko Tochigi, Commanding General, 76th Infantry Brigade, 100th Division)
Headquarters and Brigade Troops, 76th Infantry Brigade
352nd Independent Infantry Battalion
353rd Independent Infantry Battalion
168th Independent Infantry Battalion, less 3rd and 4th Companies
8th Company, 100th Division Engineer Unit
10th Company, 100th Division Engineer Unit
Ide Battalion
12th Airfield Battalion
14th Airfield Battalion
3rd Naval Battalion, 32nd Naval Special Base Force
114th Naval Air Defense Unit
126th Naval Air Defense Unit
28th Special Machine Cannon Unit (Army)
Left Sector Unit (Maj. Gen. Muraji Kawazoe, Commanding General, 75th Infantry Brigade)
Headquarters and Brigade Troops, 75th Infantry Brigade
164th Independent Infantry Battalion
165th Independent Infantry Battalion
Battery, 100th Division Artillery Unit
Company, 100th Division Engineer Unit
Elements, 1st Field Hospital, 30th Division
1st Naval Battalion, 32nd Naval Special Base Force
97th Naval Air Defense Unit
954th Naval Machine Cannon Unit
25th Special Machine Cannon Unit (Army)
26th Special Machine Cannon Unit (Army)
27th Special Machine Cannon Unit (Army)
2nd Naval Battalion, 32nd Naval Special Base Force
Force troops, 32nd Naval Special Base Force
129th Naval Air Defense Unit
Headquarters, 32nd Naval Special Base Force
Hosono Unit
Headquarters, 13th Air Sector Command
8th Airfield Battalion
127th Airfield Battalion
126th Field Airfield Construction Unit
Elements, 26th Airfield Construction Battalion
| Strength, Davao District Unit | |
| Army ground forces | 13,100 |
| Army air forces | 2,900 |
| Naval forces | 3,675 |
| Noncombatant civilians | 12,000 |
| Total | 31,575 |
Digos District Unit (Col. Rinzo Shizuru, Commanding Officer, 163rd Independent Infantry Battalion, 100th Division)
Headquarters, 163rd Independent Infantry Battalion
163rd Independent Infantry Battalion, less 3rd Company
3rd Battalion, 30th Field Artillery Regiment, 30th Division, less 9th and 11th Batteries
Platoon, 100th Division Engineer Unit
Headquarters, 4th Naval Battalion, 32nd Naval Special Base Force
94th Naval Air Defense Unit
225th Naval Construction Unit
22nd Special Machine Cannon Unit (Army)
23rd Special Machine Cannon Unit (Army)
24th Special Machine Cannon Unit (Army)
Naval Supply Depot
Naval Flying Unit
| Strength, Digos District Unit | |
| Army ground forces | 1,290 |
| Army air forces | 0 |
| Naval forces | 2,040 |
| Noncombatant civilians | 580 |
| Total | 3,910 |
Sarangani District Unit (after 1 May) (Maj. Makoto Takatsuka, Commanding Officer, 1st Battalion, 30th Field Artillery Regiment, 30th Division)
Headquarters, 1st Battalion, 30th Field Artillery Regiment
1st Battalion, 30th Field Artillery Regiment, less 3rd Battery
Company, 168th Independent Infantry Battalion
Hospitalized patients, 1st Battalion, 74th Infantry, 30th Division
Elements, 2nd Field Hospital, 30th Division
Naval Construction Unit
Naval Air Defense Unit
Naval Flying Unit
| Strength, Sarangani District Unit | |
| Army ground forces | 1,050 |
| Naval forces | 450 |
| Total | 1,500 |
Kingking District Unit (east coast of Davao Gulf)
Company, 167th Independent Infantry Battalion
Company, 168th Independent Infantry Battalion
| Strength, Kingking District Unit | |
| Army ground forces | 400 |
| Total | 400 |
| Total Japanese Strength in the 100th Division Area | |
| Army ground combat and service elements, including civilians inducted into the Army ground echelons, November 1944-April 1945 | 15,840 |
| Army air force elements, all of the service category but some armed as auxiliary infantry | 2,900 |
| Naval combat and service elements | 6,165 |
| Noncombatant, nonmilitarized civilians | 12,580 |
| Grand total | 37,485 |
| Subtotal of trained ground combat effectives | |
| 100th Division and attached units | 8,320 |
| 32nd Naval Special Base Force | 500 |
| Total | 8,820 |
G-2: 100th Division reorganization of mid-May (major combat units only)
Headquarters, 100th Division (Lt. Gen. Jiro Harada)
Right Front Line Unit (Maj. Gen. Muraji Kawazoe, Commanding General, 75th Infantry Brigade)
Headquarters and Brigade Troops, 75th Infantry Brigade
164th Independent Infantry Battalion, less one company
165th Independent Infantry Battalion, less one company
168th Independent Infantry Battalion, less one company
Company, 166th Independent Infantry Battalion
Remnants, 163rd Independent Infantry Battalion
Remnants, 3rd Battalion, 30th Field Artillery Regiment, 30th Division
Battery, 100th Division, Artillery Unit
Reinforced company, 100th Division Engineer Unit
Left Front Line Unit (Maj. Gen. Ko Tochigi, Commanding General, 76th Infantry Brigade)
Headquarters and Brigade Troops, 76th Infantry Brigade
352nd Independent Infantry Battalion
353rd Independent Infantry Battalion
Ide Battalion
167th Independent Infantry Battalion, less two companies
3rd Naval Battalion, 32nd Naval Special Base Force
100th Division Artillery Unit, less one battery (actual strength is about one battery)
Two companies, 100th Division Engineer Unit
Left District Unit (Rear Adm. Naoji Doi, Commanding Officer, 32nd Naval Special Base Force)
Headquarters and Service Troops, 32nd Naval Special Base Force
1st Naval Battalion
2nd Naval Battalion
Remnants, 4th Naval Battalion
Company, 164th Independent Infantry Battalion
Company, 165th Independent Infantry Battalion
Hosono Unit
G-3: 30th Division, 17 April 1945
Eastern Sector Unit
Headquarters, 3rd Battalion, 41st Infantry, 30th Division
3rd Battalion, 41st Infantry
Platoon, 1st Battalion, 41st Infantry
1st Company, 19th Shipping Engineer Regiment
Surigao Coast Artillery Unit
Elements, 30th Division Ordnance Service Unit
Miscellaneous army units
Miscellaneous naval units
| Strength, Eastern Sector Unit | |
| Army ground forces | 1,900 |
| Naval forces | 300 |
| Total | 2,200 |
Northern Sector Unit (Col. Toshiro Nawa, Commanding Officer, 30th Reconnaissance Regiment)
Headquarters, 30th Reconnaissance Regiment, 30th Division
30th Reconnaissance Regiment, less 3rd Company
1st Battalion, 77th Infantry, 30th Division
3rd Company, 1st Battalion, 74th Infantry, 30th Division
19th Shipping Engineer Regiment, less 1st Company
15th Debarkation Unit
61st Anchorage Headquarters
Provisional Artillery Battery, 30th Field Artillery Regiment
Reinforced company, 30th Engineer Regiment
Headquarters, Del Monte Sector Air Force Unit
102nd Airfield Battalion, less elements
103rd Airfield Battalion
1st Special Airfield Construction Unit
Elements, 125th Field Airfield Construction Unit
Elements, 37th Airfield Battalion
Miscellaneous 2nd Air Division units
| Strength, Northern Sector Unit | |
| Army ground forces | 2,100 |
| Army air forces | 2,400 |
| Total | 4,500 |
Central Sector Unit (Col. Kan Negishi, Commanding Officer, 74th Infantry, 30th Division)
Headquarters, 74th Infantry, 30th Division
74th Infantry, less 1st Battalion
6th Company, reinforced, 77th Infantry
3rd Company, 30th Reconnaissance Regiment
Headquarters, 30th Field Artillery Regiment
2nd Battalion, 30th Field Artillery Regiment
3rd Battery, 1st Battalion, 30th Field Artillery Regiment
Company, 30th Engineer Regiment
Valencia Sector Air Force Unit
Rear Strong Point Construction Force
Headquarters, 31st Air Sector Command
32nd Airfield Battalion
37th Airfield Battalion, less elements
125th Field Airfield Construction Unit, less elements
Valencia Sector Force
1st Repair Depot, Manila Air Depot
Headquarters, 3rd Airfield Construction Unit
8th Special Airfield Construction Unit
33rd Airfield Battalion
18th Special Machine Cannon Unit (Army)
19th Special Machine Cannon Unit (Army)
8th Independent Maintenance Unit, 14th Field Air Depot
1st Branch Depot, 2nd Repair Depot
Headquarters, 1st Signal Unit
Miscellaneous 2nd Air Division units
| Strength, Central Sector Unit | |
| Army ground forces | 2,900 |
| Army air forces | 2,600 |
| Total | 5,500 |
30th Division Headquarters Unit (Lt. Gen. Gyosaku Morozumi, Commanding General, 30th Division) (Located in Central Sector Unit’s Area)
Headquarters, 30th Division
30th Transportation Regiment, 30th Division
Two companies, 30th Engineer Regiment
2nd Field Hospital, 30th Division
4th Field Hospital, 30th Division
4th Company, 1st Battalion, 74th Infantry
Water Supply and Purification Unit, 30th Division
Signal Unit, 30th Division
Elements, Ordnance Service Unit, 30th Division
Sick Horse Depot, 30th Division
Miscellany
| Strength, Headquarters Unit | |
| Army ground forces | 1,000 |
Southern Sector Unit (Col. Koritaki Ouchi, Commanding Officer, 30th Engineer Regiment)
Headquarters, 30th Engineer Regiment, 30th Division
30th Engineer Regiment, less four companies
7th Company, 100th Division Engineer Unit
9th Company, 100th Division Engineer Unit
1st Battalion, 74th Infantry, less two companies
3rd Company, 166th Independent Infantry Battalion, 100th Division, less two platoons
1st Field Hospital, 30th Division
Medical Service Unit, 30th Division (Murase Battalion)
| Strength, Southern Sector Unit | |
| Army ground forces | 2,500 |
Western Sector Unit (Lt. Col. Yutaka Takumi, Commanding Officer, 166th Independent Infantry Battalion)
Headquarters, 166th Independent Infantry Battalion, 75th Brigade,
100th Division
166th Independent Infantry Battalion, less 3rd Company (less two platoons)
1st Company, 12th Airfield Battalion
Elements, Medical Service Unit, 30th Division
Elements, 4th Company, 100th Division Engineer Unit
Miscellany
| Strength, Western Sector Unit | |
| Army ground forces | 1,350 |
| Army air forces | 150 |
| Total | 1,500 |
| Total Strength in the 30th Division Area | |
| Army ground combat and service elements | 11,750 |
| Army air force elements, all of the service category but some armed as auxiliary infantry | 5,150 |
| Naval forces | 300 |
| Grand total | 17,200 |
| Subtotal of trained ground combat effectives | |
| 30th Division and attached units | 5,800 |
| 5,800 |
G-4: Order of battle of Japanese forces along the northwestern section of the Kibawe–Talomo trail
Ca. 10 May 45
Command Groupment, Chief of Staff, 35th Army (Maj. Gen. Yoshiharu Tomochika)
Chief of Staff’s Office
Elements, 35th Army Signal Unit
100th Division Field Hospital
13th Southern Army Hospital
Headquarters, 58th Field Road Construction Battalion
58th Field Road Construction Battalion
Remnants, 4th, 7th, and 9th Companies, 100th Division Engineer Unit
1st and 2nd Provisional Construction Duty Companies
Platoon, 37th Construction Duty Company
Company, 30th Transportation Regiment, 30th Division
Elements, Medical Service Unit, 30th Division
One-half Machine Gun Company, 1st Battalion, 74th Infantry
Stragglers, rifle companies, 1st Battalion, 74th Infantry
Elements, 1st Shipping Engineer Replacement Unit
Elements, 3rd Company, 19th Shipping Engineer Regiment
| Service troops | 750 |
| Combat troops | 250 |
| Total | 1,000 |
Added in mid-June
Understrength company, 163rd Independent Infantry Battalion, 100th Division
Understrength company, 353rd Independent Infantry Battalion, 100th Division
Added in late July
Remaining remnants, 353rd Independent Infantry Battalion, 100th Division