Changes

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| +2 || || || || || || +1

| +2 || || || || || || +1

| style="text-align:left;" | Non-stackable between any {{EquipmentLink|Zuiun|Prototype Seiran|Zuiun (634 Air Group)|Zuiun Model 12|Zuiun Model 12 (634 Air Group)|Zuiun (631 Air Group)|Seiran (631 Air Group)|text=lower-tier IJN Seaplane Bombers}}

| style="text-align:left;" | Non-stackable between any {{EquipmentLink|Zuiun|Prototype Seiran|Zuiun (634 Air Group)|Zuiun Model 12|Zuiun Model 12 (634 Air Group)|Zuiun (631 Air Group)|Seiran (631 Air Group)|text=lower-tier IJN Seaplane Bombers}}<ref>Includes {{EquipmentLink|Zuiun}}, {{EquipmentLink|Prototype Seiran}}, {{EquipmentLink|Zuiun (634 Air Group)}}, {{EquipmentLink|Zuiun Model 12}}, {{EquipmentLink|Zuiun Model 12 (634 Air Group)}}, {{EquipmentLink|Zuiun (631 Air Group)}}, {{EquipmentLink|Seiran (631 Air Group)}}</ref>

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! {{ShipLink|Yahagi/Kai Ni|Yahagi/Kai Ni B|text=Yahagi Kai Ni (B)}}<br/>{{ShipLink|Mogami/Kai Ni|Mogami/Kai Ni Toku|text=Mogami Kai Ni (Toku)}}

! {{ShipLink|Yahagi/Kai Ni|Yahagi/Kai Ni B|text=Yahagi Kai Ni (B)}}<br/>{{ShipLink|Mogami/Kai Ni|Mogami/Kai Ni Toku|text=Mogami Kai Ni (Toku)}}

| style="text-align:left;" | {{Firepower}} is non-stackable between any {{EquipmentLink|Zuiun|Prototype Seiran|Zuiun (634 Air Group)|Zuiun Model 12|Zuiun Model 12 (634 Air Group)|Zuiun (631 Air Group)|Seiran (631 Air Group)|text=lower-tier IJN Seaplane Bombers}}

| style="text-align:left;" | {{Firepower}} is non-stackable between any {{EquipmentLink|Zuiun|Prototype Seiran|Zuiun (634 Air Group)|Zuiun Model 12|Zuiun Model 12 (634 Air Group)|Zuiun (631 Air Group)|Seiran (631 Air Group)|text=lower-tier IJN Seaplane Bombers}}

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