| Ship | Extra Requirement | 
|
|
|
|
|
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|
Note |
|---|---|---|---|---|---|---|---|---|---|
Noshiro Kai Ni
|
+2 | +1 | Non-stackable between any lower-tier IJN Seaplane Bombers     [1]
| ||||||
Yahagi Kai Ni (B)  Mogami Kai Ni (Toku)  
|
+2 | +1 | +1 | is non-stackable between any lower-tier IJN Seaplane Bombers
|
