Zuiun (631 Air Group)
|Coastal Defense Ship||Destroyer|
|Light Carrier||Standard Carrier|
|Armored Carrier||Seaplane Tender|
|Submarine||Aircraft Carrying Submarine|
|Submarine Tender||Fleet Oiler|
|Repair Ship||Amphibious Assault Ship|
Multi-purpose recon seaplane "Zuiun" that is capable of performing sudden dive-bombing attacks. The 631st Navy Air Force utilizing as a submarine launched seaplane group to operate the expensive, high performance attack aircraft "Seiran". This "Zuiun" used by the 631st Navy Air Group for training.
December 2016 ranking reward.
Winter 2017 Event E-1 normal and hard reward.
The 631st Air Group used the Zuiun as a training aircraft until the arrival of the Seiran (This is demonstrated by the use of orange paint normally used by aircraft like the Prototype Nanzan, which served as a training plane to aid pilot conversion to the Seiran, and the arrows carried by Houshou indicating her role as a training ship).
第六三一海軍航空隊 - Wikipedia(Japanese link)