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



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), 2404 F2 (★+2, 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

Carrier Recon Type Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
All Ships (1st equipped) (★2-3) +1 One-time[1]
(1st equipped) (★4-5) +1 +1 One-time[1]
(1st equipped) (★6-9) +1 +2 One-time[1]
(1st equipped) (★MAX) +2 +3 One-time[1]
  1. 1.0 1.1 1.2 1.3 Shared with all Reconnaissance AircraftCarrier Recon


YellowPlane.png Prototype Keiun (Carrier-based Reconnaissance Model)

Improvement Conversion
★ Improvement
0~5 6~9
Equipment Card Jet Keiun Kai.png
Jet Keiun Kai
Development material Consumed 8/10 10/15 20/30
Improvement material Consumed 6/8 7/10 10/13
Equipment Card Ryuusei.png Equipment Card Prototype Reppuu Late Model.png -
- Item Icon Ne Type Engine.png
Resources Fuel250 Ammunition100 Steel700 Bauxite650
Ship Helper Conversion
Ship Banner Shoukaku Kai Ni A.png
Shoukaku Kai Ni A
Equipment Card Jet Keiun Kai.png
Jet Keiun Kai
Mon Tue Wed Thu Fri Sat Sun
Ship Banner Zuikaku Kai Ni A.png
Zuikaku Kai Ni A
Mon Tue Wed Thu Fri Sat Sun
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


The depicted plane is allegedly the R2Y1-C variant (did not exist/enter service as is).

See Also