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| 11th Wewak Transport Convoy (Japanese) |
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| 122nd Infantry Regt Conscript Reserve (Japanese) |
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| 122nd Infantry Regt (Japanese) |
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| 123rd Infantry Regiment (Japanese) |
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| 123rd Line of Communication Hospital (Japanese) |
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| 12th Air Brigade (Japanese) |
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| 12th Air Fleet HQ (Japanese) |
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| 12th Army Staff Training Unit (Japanese) |
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| 12th Field Anti-aircraft Artillery HQ (Japanese) |
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| 12th Field Anti-aircraft Defence Unit (Japanese) |
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| 12th Torpedo Boat Sqn (Japanese) |
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| 12th Transport Flying Sqn (Japanese) |
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| 131st Airfield Bn (Japanese) |
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| 132nd Infantry Regt (Japanese) |
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| 13th Air Fleet (Japanese) |
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| 13th Flying Bde (Japanese) |
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| 13th Infantry Regt 4th Coy (Japanese) |
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| Pacific War (1941-1945) |
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| | Item - War diary for the 13th Infantry Regt 4th Coy in NishibĂ´ekiten in Bougainville (series Army campaign reports and records): 1/4/1943 to 30/4/1943 | |
| 13th Infantry Regt Headquarters (Japanese) |
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| 13th Infantry Regt (Japanese) |
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| 14 Field Artillery Regt 3rd Bn (Japanese) |
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| 141st Infantry Regiment (Japanese) |
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| 141st Infantry Regt 10th Coy (Japanese) |
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| 141st Infantry Regt 11th Coy (Japanese) |
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| 141st Infantry Regt 1st Battalion (Japanese) |
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| 141st Infantry Regt 1st Bn 1st Coy (Japanese) |
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| 141st Infantry Regt 1st Bn 3rd Coy 1st Pl (Japanese) |
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| 141st Infantry Regt 1st Bn (Japanese) |
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| 141st Infantry Regt 1st Coy (Japanese) |
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