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| 18 army (Japanese) |
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| 18th Area Army (Japanese) |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| Bismarck Archipelago |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| New Britain |
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| Rabaul |
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| Rabaul Area |
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| Netherlands East Indies (Indonesia) |
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| 18th Army 112th Line of Communication Hospital (Japanese) |
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| 18th Army 20th Div 80th Infantry Regt (Japanese) |
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| 18th Army 20th Div (Japanese) |
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| 18th Army 3rd Telegraph Regt (Japanese) |
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| 18th Army 51st Div (Japanese) |
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| 18th Army 54th Line of Communication Unit (Japanese) |
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| 18th Army 66th Infantry Regt 2nd Bn SUGIYAMA Unit (Japanese) |
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| 18th Army Finance Dept (Japanese) |
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| 18th Army General Staff (Japanese) |
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| 18th Army Headquarters Azuma Unit 1st Coy 2nd Sect (Japanese) |
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| 18th Army HQ Military Police Sect KAMI Organization (Japanese) |
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| 18th Army HQ (Japanese) |
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| 18th Army Intendance Unit (Japanese) |
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| 18th Army Judicial Dept (Japanese) |
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| 18th Army Logistics HQ (Japanese) |
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| 18th Army Medical Dept (Japanese) |
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| 18th Army Medical Sect (Japanese) |
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| 18th Army Military Police Wewak Squad (Japanese) |
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| 18th Army Military Police (Japanese) |
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| 18th Army MO Signal Unit (Japanese) |
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| 18th Army Ordnance Dept (Japanese) |
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