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| 11th Field Anti-aircraft Defence Unit (Japanese) |
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| 11th Group (Japanese) |
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| 11th Independent Engineer Regt 2 Debarkation Group (Japanese) |
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| 11th Kure Air Defense Unit (Japanese) |
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| 11th Motor Torpedo Boat Sqn (Japanese) |
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| 11th Transport Flying Sqn (Japanese) |
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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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| Japan–Formosa |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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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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| 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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