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 | 20th Division 2nd Field Hospital (Japanese) |
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| 20th Division 4th Field Hospital (Japanese) |
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| 20th Division 78th Infantry Regt 1st Coy (Japanese) |
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| 20th Division 78th Infantry Regt 1st Infantry Gun Det (Japanese) |
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| 20th Division 78th Infantry Regt 1st Infantry Gun Pl (Japanese) |
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| 20th Division 78th Infantry Regt 2nd Bn Machine Gun Pl (Japanese) |
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| 20th Division 78th Infantry Regt 2nd Coy (Japanese) |
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| 20th Division 78th Infantry Regt 6th Coy (Japanese) |
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| 20th Division 78th Infantry Regt Conscript Reserve 1st Machine Gun Coy (Japanese) |
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| 20th Division 78th Infantry Regt (Japanese) |
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| 20th Division 79th Infantry Regt 67th Coy (Japanese) |
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| 20th Division 79th Infantry Regt (Japanese) |
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| 20th Division 80th Infantry Regt (Japanese) |
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| 20th Division Finance Corps (Japanese) |
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 | 20th Division Infectious Disease Prevention and Water Supply Unit Sanitation Group (Japanese) |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| Alexishafen |
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| Huon Peninsula |
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| Madang |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| Nagada |
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| New Guinea |
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| Ramu River |
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| Ramu River–Finisterre Range |
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| Wewak–Madang Area |
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| Yaula |
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| Yokopi |
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| 20th Division Military Police (Japanese) |
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| 20th Division (Japanese) |
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| 20th Engineer Regt 2nd Coy 2nd Pl (Japanese) |
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