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| 1st Fleet (Japanese) |
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| 1st Guard Coy (Japanese) |
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| 1st Independent Field Searchlight Anti-aircraft Coy (Japanese) |
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| 1st Independent Garrison Bn (Japanese) |
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| 1st Independent Mixed Bde 2nd Bn 4th Coy (Japanese) |
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| 1st Independent Mixed Regt 1st Bn 4th Coy (Japanese) |
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| 1st Independent Mixed Regt 2nd Bn 4th Coy 2nd Pl 1st Sect (Japanese) |
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| 1st Independent Mixed Regt 2nd Bn 4th Coy (Japanese) |
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| 1st Independent Mixed Regt (Japanese) |
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| 1st Machine Gun Unit (Japanese) |
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| 1st Marine Engineer Bn 2nd Coy (Japanese) |
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| 1st Marine Engineer Regt 1st Coy (Japanese) |
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| 1st Marine Engineer Regt Liaison Unit (Japanese) |
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| 1st Marine Engineer Regt (Japanese) |
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| 1st Marine Engineer Workshop (Japanese) |
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| 1st Mixed Regt (Japanese) |
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| 1st Pl (Japanese) |
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| 1st Raid Brigade (Japanese) |
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| 1st Shipping Construction Depot (Japanese) |
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| 1st Shipping Engineer Regt 1st Coy 3rd Pl (Japanese) |
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| 1st Shipping Engineer Regt 1st Coy (Japanese) |
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| 1st Shipping Engineer Regt 2nd Coy (Japanese) |
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| 1st Shipping Engineer Regt 3rd Coy 3rd Pl 4th Sect (Japanese) |
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| 1st Shipping Engineer Regt (Japanese) |
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| 1st Shipping Enginner Regt (Japanese) |
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| 1st Shipping Regt (Japanese) |
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| 1st Shipping Repair Unit (Japanese) |
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| 1st Special Naval Landing Party (Japanese) |
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| 1st Telegraph Regt Conscript Reserve (Japanese) |
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| 1st Working Group (Japanese) |
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