| 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}} |