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Prototype Shuusui

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Prototype Autumn Water
No.351 試製 秋水
Interceptor Fighter Icon.png Land-based Fighter
Effects: AA+2 Anti-Bomber+8
Combat Radius: 1 (Deployment Cost: Bauxite 4)
Scrap value: Fuel 4 Ammo 3 Steel 1 Bauxite 6 (Unbuildable)

Equipment Card Prototype Shuusui.png

Equipment Character Prototype Shuusui.png

Equipment Item Prototype Shuusui.png

Equipment Full Prototype Shuusui.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



This is the world's first mass-produced rocket-powered fighter developed and put into service by the Country of Science.
This is a Japanese-made prototype rocket-powered fighter developed jointly by the IJA and IJN based on valuable, but incomplete, blueprints brought back by the I-class submarine.
It was made to intercept heavy bombers at distant, high altitudes that were difficult for regular aircraft with reciprocating engines.


Prototype Shuusui is considered in-game as a high altitude interceptor.

  • High Altitude Interceptors multiply the total air power of all land bases in Air Defense mode, when defending against enemy High-Altitude Bombers. The multiplier depends on the number of high altitude interceptors equipped and which difficulty the event map is played on:
Land-based Fighter High Altitude Interceptors
Equipment Card Me 163B.png
Me 163B
Equipment Card Prototype Shuusui.png
Prototype Shuusui
Equipment Card Shuusui.png
Airpower modifier against high altitude raids:
Event Map
Number of High Altitude
Interceptors Defending
0 1 2 3+
Casual/Easy: 1x 1.1x 1.2x
Medium/Hard: 0.5x 0.8x

How To Obtain

From quest: B153 (choice)

Ranking reward for:

  • Jul 2019: 1-5, 6-20, 21-100, 101-500

Event reward for:

Updates History

  • 2019-08-28: Implemented as ranking reward

See Also