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Prototype Keiun (Carrier-based Reconnaissance Model)

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Prototype Cirrus Cloud (Carrier-based Reconnaissance Model)
No.151 試製景雲(艦偵型)
YellowPlane.png Carrier-based Reconnaissance Aircraft (II)
Effects: Firepower+2 Accuracy+2 LoS+11
Combat Radius: 8 (Deployment Cost: Bauxite 12)
Scrap value: Fuel 4 Bauxite 14 (Unbuildable)

Equipment Card Prototype Keiun (Carrier-based Reconnaissance Model).png

Equipment Character Prototype Keiun (Carrier-based Reconnaissance Model).png

Equipment Item Prototype Keiun (Carrier-based Reconnaissance Model).png

Equipment Full Prototype Keiun (Carrier-based Reconnaissance Model).png

Refittable Class
Coastal Defense Ship Destroyer
Light Cruiser Torpedo Cruiser
Heavy Cruiser Training Cruiser
Aviation Cruiser Fast Battleship
Battleship Aviation Battleship
Light Carrier Standard Aircraft Carrier
Armored Carrier Seaplane Tender
Submarine Aircraft Carrying Submarine
Submarine Tender Fleet Oiler
Repair Ship Amphibious Assault Ship



The high-flight-level prototype reconnaissance plane "Keiun" developed by the Air Technical Arsenal. This is the remodeled version suitable for carriers.
"Keiun" has a unique body, and there were planes to equip the "Ne-330" turbojet engine to transform it into an attacking plane
(this plane is only usable by a small portion of elite standard carriers).


Reconnaissance AircraftReconnaissance AircraftLarge Reconnaissance AircraftSpLand-based Reconnaissance AircraftLBReconnaissance SeaplaneReconNight Reconnaissance Seaplane are planes that:


Not to be confused with other aircraft of this family (see here).

How To Obtain

From quest: B143 (choice), F45

From limited-time quest: 2112 LB03 (choice)

Ranking reward for:

  • Sep 2015: 1-5, 6-20
  • Oct 2015: 1-5, 6-20, 21-100, 101-500
  • Oct 2016: 1-5, 6-20, 21-100, 101-500
  • Jan 2020: 1-5 (★+4), 6-20 (★+4), 21-100, 101-500

Updates History

  • 2015-10-21: Implemented as ranking reward
  • 2016-12-09: Became improvable and upgradeable to Jet Keiun KaiJet Keiun Kai
  • 2019-02-08: Visible bonuses added

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
All Equippable Ships (★2-3) +1 Non-stackable between any Carrier-based Recon Aircraft
(★4-5) +1 +1
(★6-9) +1 +2
(★MAX) +2 +3


Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Reconnaissance Aircraft Prototype Keiun 0 250 100 700 650 8/10 6/8 1xBluePlane.png  
X X X Shoukaku Kai Ni A
Zuikaku Kai Ni A
Upgrades to Jet Keiun Kai
6 10/15 7/10 1xGreenPlane.png
10 20/30 10/13 1xItem Icon Ne Type Engine.png
Improvement Improved effects
Reconnaissance Aircraft 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Line of Sight 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79

See Also

Yokosuka R2Y