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Type 0 Fighter Model 21
No.20 零式艦戦21型
GreenPlane.png Carrier-based Fighter Aircraft
Effects: AA+5
Combat Radius: 7 (Deployment Cost: Bauxite 4)
Scrap value: Fuel 1 Ammo 1 Bauxite 2 (Buildable)
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



Known as the "Zero-fighter", this is the initial variant of the "Type Zero Carrier-based Fighter". Equipment included twin 7.7 mm machine guns and boasted twin 20 mm cannons.
With far-reaching range and excellent dogfighting ability, it represented overwhelming power.
But eventually, when the enemy produced new machines with greater firepower and speed, weaknesses such as ballistic resistance were revealed.




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Known to the Imperial Japanese Navy as the 'Type 0 Carrier Fighter', this was one of the finest planes to serve in any air force. Capable of higher speeds than any comparable American plane and more maneuverable to boot, it also boasted a hugely powerful armament of two 7.7 mm machine guns and two 20mm cannons which fire explosive shells, giving it the power to shred any enemy in seconds. It has been in service since early 1940, and is known by the code name 'Zeke'.

The Mitsubishi A6M2 Type 0 Model 21 Carrier-based Fighter is the initial production variant of the A6M Type 0 Carrier-based Fighter (also called Rei-sen, but more commonly "Zero-sen", with the Allied reporting name "Zeke"), the predominant Japanese naval fighter of World War II. The 0 in its designation referred to the last digit of Imperial year 2600 (Gregorian year 1940) which it entered service. When encountered, it was codenamed Zeke, but eventually "Zero" became commonplace in Allied speaking.

Development by Mitsubishi started in 1937 whilst its predecessor - the Mitsubishi A5M (Type 96 Carrier-based Fighter) - was entering service as the Imperial Japanese Navy began to consider its eventual replacement. Specification 12-shi was sent to Nakajima and Mitsubishi, which both initiated early development phases whilst waiting more complete requirements.

Assessing the performance and experiences of the then service-fighter A5M, the IJN's final requirements were for the fighter to reach speeds of 600 km/h and climb to 3 km in 3.5 minutes while being able to operate for as much as 6-8 hours at cruise with drop-tanks. Equipment was to include a complete radio and armament of twin 20 mm cannons plus twin 7.7 mm machine guns as well as 60 kg of bombs. Maneuverability was to be at least equal to the A5M with a wingspan less than 12m so that it could be fielded on aircraft carriers. On top of those lofty specifications, Specification 12 had to use available engines, a significant limitation.

Nakajima's engineering team deemed Specification 12's targets impossible and resigned from the competition. Jiro Horikoshi, developer of the A5M (and subsequently, the A7M) thought it was feasible only with an aircraft as light as possible. Every possible weight-reduction measure was incorporated into the A6M, including Sumitomo Metal's new top-secret 7075 aluminum alloy, "Extra Super Duralumin". Armor for the pilot, engine or other critical points was dropped, as were self-sealing fuel tanks. It had a cantilever low-wing layout, retractable landing gear and enclosed cockpit.

The A6M1 prototype, powered by a 780 hp Mitsubishi Zuisei 13 engine, passed its testing in a remarkably short period and was ordered into service as the A6M1. Shortly after, the A6M2 incorporated an engine change suggested by the Navy to the 700 hp Nakajima Sakae 12. The new prototype so greatly surpassed the original specifications that 15 units were sent to battle in China, where they were untouched by planes that troubled the A5M. These results led the Navy to immediately order the A6M2 into production as the Type 0 Model 11.

One of the most advanced aircraft of its time, the A6M2 Zero was lighter and more maneuverable thanks to its aggressive weight-reduction and boasted the longest range of any single-engine fighter in the war. It could maintain stable flight well below 110 km/h, allowing it to out-turn any contemporary Allied fighter. Reports of its performance eventually reached the United States, where they were dismissed as impossible. The A6M2 Type 0 Model 21 in particular introduced folding wingtips so that the plane could better fit onto aircraft carriers, as well as improved range. 2,048 Type 0 Model 21s were constructed by Mitsubishi and Nakajima, including 508 trainers by Hitachi and Sasebo.

Compared to contemporary Allied fighters, however, the anorexic Zero-fighter traded ruggedness and pilot-protection for its maneuverability. This was compounded by its conventional - instead of self-sealing - fuel tanks, which could easily catch fire and explode when shot. Although it could fly a long distance and was difficult to hit, it required little damage to destroy, unlike its opponents.

When powerful Allied aircraft such as the P-38 Lightning, F6F Hellcat and F4U Corsair were fielded, the A6M - with its low powered engine - had difficulty competing. Regardless, it was developed further into variants such as the A6M5 Type 0 Model 52 and A6M7 Type 0 Model 62.

  • The color scheme of the in-game artwork was originally based off that of the A6M2 Zero flown by Saburo Sakai - V-173, one of Japan's most most famous World War II fighter aces.
    • The current in-game artwork is based of the color scheme of an aircraft from Hiryuu's Fighter wing (as noted by the two blue stripes on the fuselage).
  • The Zero was believed to be a copy of the Vought V-141 fighter (which was later redesignated V-143 after modification), but ultimately such claims were discredited.
  • In the 1st episode of the Kancolle Anime, this plane is seen shooting at an Elite I-class Destroyer to rescue Fubuki. Fighters do not contribute to attack power against ships in the game, but would be realistically capable of firing at ships: although generally of a negligible threat to sizeable ships themselves (although a plethora of PT Imps, other small craft and merchant shipping fell victim to them), strafing runs against the bridge (generally, ships smaller than cruisers had no armored command post), poorly or entirely unprotected light artillery and fire control posts could deal a significant blow to a ship's fighting capability and weren't an uncommon tactic when the enemy fleet could not put up a suitable AA response.


See also

[Edit]List · Gallery · By Stats · Development · Improvement · Overweight / Fit Gun · Visible Bonuses
Main Gun Small QF 4.7inch Mk.XII Kai · 12cm Single (Kai 2· 120mm/50 Twin · 12.7cm Single · 12.7cm Twin (Model A (Kai 2· Model B · Model C · Model D (Kai 3)) · 130mm B-13 Twin
AA 10cm Twin HA · 12cm Single HA · 12.7cm HA LM (Single · Twin· 12.7cm HA K2 (Single · Twin· 5inch Single Mk.30 (Kai)
AAFD 10cm Twin HA + AAFD · 12.7cm Twin Model A Kai 3 + AAFD · 12.7cm Twin Model B Kai 4 + AAFD · 5inch Single Mk.30 Kai + GFCS Mk.37
Medium 14cm Single · 14cm Twin (Kai· Bofors (15cm Twin 1938 (Kai· 15.2cm Twin 1930· 15.2cm Twin (Kai· 152mm/55 Triple (Kai· 6inch Twin Mk.16 (mod.2· 6inch Twin Mk.XXI · 15.5cm Triple (Kai· 20.3cm Twin ((No.2) · (No.3)· SKC34 20.3cm Twin · 203mm/53 Twin · 8inch Triple Mk.9 (mod.2)
AAFD 5inch Twin DP (+ GFCS Mk.37)
Large 30.5cm Triple (Kai· 35.6cm Twin (Dazzle Camo · Kai · Kai 2· Proto 35.6cm Triple (Kai Dazzle Camo) · 38cm Twin (Kai· 38cm Quad (Kai· 381mm/50 Triple (Kai· 38.1cm Twin (/N Kai· 41cm Twin (Kai 2· 41cm Triple Kai (Proto 41cm · Kai 2· 46cm Triple (Proto 46cm · Kai)

16inch Twin (Mk.I · Mk.V · Mk.VIII Kai· 16inch Triple Mk.6 (mod.2 · + GFCS· 16inch Triple Mk.7 (+ GFCS)
16inch Mk.I Triple (+ AFCT Kai · + FCR Type 284)

Large (II) 51cm Twin (Prototype)
Secondary Gun 15cm Twin · 15.2cm Single · OTO 152mm Triple · 15.2cm Triple · 15.5cm Triple (Kai)
AA 8cm Twin HA (Kai + Add. Machine Guns· 10cm Twin HA (Carriage) · 10.5cm Twin · 12.7cm Twin HA · 5inch Single HA
AAFD 90mm Single HA · 10cm Twin HA Kai + Add. Machine Guns · 12.7cm HA + AAFD · 5inch Twin Mk.28 mod.2
Anti-Air Machine Gun 7.7mm · 12.7mm Single · 2cm Flakvierling 38 · 25mm Single (Twin · Triple· 3.7cm FlaK M42 · Bi Type 40mm Twin · 12cm 30-tube Rocket Launcher (Kai 2· 20-tube 7inch UP Rocket Launchers
C.D. 25mm Triple (Concentrated Deployment) · Bofors 40mm Quad · QF 2-pounder Octo
Fire Director Type 91 Anti-Aircraft Fire Director · Type 94 Anti-Aircraft Fire Director
Torpedo Weapon Torpedo 53cm Twin · 53cm Oxygen Bow · 533mm Triple · 533mm Quint (Initial Model · Late Model· 61cm (Triple · Quad· 61cm Oxygen (Triple (Late Model· Quad (Late Model· Quint · Proto Sext)
Sub Submarine 53cm Bow (8 tubes) · Prototype FaT Type 95 Oxygen Torpedo Kai · Late Model Bow Torpedo Mount (6 tubes) (+ Skilled Sonar Personnel· Late Model 53cm Bow Torpedo Mount (8 tubes)
Midget Sub Kouhyouteki (Type A · Type C · Type D)
Carrier-based Aircraft Fighter Type 96 Fighter (Kai· Zero (Model 21 (Skilled · Iwamoto· Model 32 (Skilled· Model 52 (Skilled · 52A Iwamoto · 52C 601 · 52C Iwai· Model 53 (Iwamoto)) · Shiden (Kai 2 · Kai 4· Reppuu (Proto Late Model · Model 11 · 601 · Kai (Prototype) · Kai 2 (CarDiv 1/Skilled)) · Shinden Kai

German: Bf 109T Kai · Focke-Wulf (Fw 190T Kai · Fw 190 A-5 Kai)
Italian: Reggiane (Re.2001 OR Kai · Re.2005 Kai)
American: Wildcat (F4F-3 · F4F-4· Hellcat (F6F-3  · F6F-5)  · XF5U
British: Fulmar · Seafire Mk.III Kai

Night Reppuu Kai 2 Model E (CarDiv 1/Skilled· Hellcat (F6F-3N · F6F-5N)
Torpedo Bomber Type 97 (Skilled · 931 (931/Skilled· Tomonaga · Murata· Tenzan (931 · 601 · Model 12A · Model 12 Tomonaga · Model 12 Murata· Ryuusei (601 · Kai (CarDiv 1 · CarDiv 1/Skilled)) · Re.2001 G Kai · Swordfish (Mk.II · Mk.III· TBD · TBF
Night TBM-3D · Type 97 Kai Model E (Skilled· Tenzan Model 12A Kai (Skilled)
Dive Bomber Type 99 (Skilled · Egusa· Suisei (Model 12A (634 w/Cluster Bombs · w/ Photo Fuze Bombs· Model 22 (634 (634/Skilled)) · Egusa · 601· Type 0 Fighter-bomber (Model 62 (Iwai· Model 63· Prototype Nanzan · Ju 87C Kai (Kai 2 (Skilled)) · SBD · F4U-1D · FM-2 · Skua · Re.2001 CB Kai · SB2U
Recon Saiun (Eastern Caroline · 4th Recon Squad· Type 2 Recon · Prototype Keiun
Seaplane Flying Boat Type 2 Large Flying Boat · PBY-5A Catalina
Recon Type 0 Recon (Model 11B · (Skilled)) · Type 0 Observation · Shiun · Type 98 Night Recon · Ar196 Kai · Ro.43 Recon · OS2U · S9 Osprey · Swordfish Mk.II Kai (Recon) · Fairey Seafox
Bomber Zuiun (Model 12 (634)) · Kai 2 (634 (634/Skilled)) · 631 · 634 (634/Skilled)) · Seiran (Prototype Seiran · 631· Laté 298B · Swordfish (Seaplane) (Mk.III Kai (Skilled))
Fighter Ro.44 Seaplane Fighter (bis· Type 2 Seaplane Fighter Kai (Skilled· Kyoufuu Kai
Land-based Aircraft Attack Type 96 · Type 1 (Nonaka · Model 22A · Model 34· Ginga (Egusa)
Patrol Toukai (Prototype · 901)
Fighter Interceptor Raiden · Shiden (Model 11 · Model 21 (Kai (343) 301st Sq.)) · Reppuu Kai (352 Air Group/Skilled· Shuusui (Prototype)
IJA/Foreign Type 1 Fighter Hayabusa (Model II (64th Sq.· Model III A (54th Sq.)) · Type 3 Fighter Hien (244 · Model 1D· Type 4 Fighter Hayate · Spitfire (Mk.I · Mk.V · Mk.IX· Fw 190 D-9 · Me 163B
LBAA-IJA Bomb-carrying Type 1 Fighter Hayabusa Model III Kai (65th Squadron)
Recon Type 2 LB Recon (Skilled)
Jets Fighter-Bomber Jet Keiun Kai · Kikka Kai
Anti-submarine Warfare Patroller Ka Type Observation Autogyro · O Type Observation Autogyro Kai (Kai 2· S-51J (Kai· Type 3 Command Liaison Aircraft (ASW)
Depth Charge Projector Type 94 Depth Charge Projector · Type 3 Depth Charge Projector
Racks Type 95 Depth Charge · Type 2 Depth Charge
Other Type 3 Depth Charge Projector (Concentrated Deployment) · Type 2 12cm Mortar Kai (Concentrated Deployment· 15cm 9-tube ASW Rocket Launcher · RUR-4A Weapon Alpha Kai · Lightweight ASW Torpedo (Initial Test Model)
Sonar Type 93 Passive Sonar · Type 3 Active Sonar · Type 0 Passive Sonar · Type 4 Passive Sonar · ASDIC (Type124 ASDIC · Type144/147 ASDIC · HF/DF + Type144/147 ASDIC)
Shell Type 3 Shell (Kai· Type 91 Armor Piercing Shell · Type 1 Armor Piercing Shell (Kai)
Anti-Ground WG42 (Wurfgerät 42) · Type 4 20cm Anti-ground Rocket Launcher (Concentrated Deployment)
Amphibious and Transport Landing Craft Daihatsu Landing Craft ((Type 89 Medium Tank & Landing Force)· Toku Daihatsu Landing Craft (+ 11th Tank Regiment· M4A1 DD
Tank Special Type 2 Amphibious Tank
Drum Drum Canister (Transport Use)
Material Saiun (Disassembled for Transport)
Radar Small Air Type 13 Air Radar (Kai· SG Radar (Initial Model) · GFCS Mk.37
Large Air Type 21 Air Radar (Kai· Type 42 Air Radar · 15m Duplex Rangefinder + Type 21 Radar Kai 2 · FuMO25 Radar · SK Radar (+ SG)
Small Surface Type 22 Surface Radar (Kai 4 (Calibrated Late Model)) · Type 33 Surface Radar
Large Surface Type 32 Surface Radar (Kai)
Submarine Submarine Radar (& Waterproof Telescope · & Passive Radiolocator ((E27) · Late Model))
Engine Turbine Improved Kanhon Type Turbine
Boiler Enhanced Kanhon Type Boiler · New Model High Temperature High Pressure Boiler
Bulge Anti-torpedo Bulge (Medium · Large· New Kanhon Design (Medium · Large· Pugliese Underwater Protection Bulkhead · Arctic Camouflage (+ Arctic Equipment)
Night Battle Aid Searchlight · Type 96 150cm Searchlight · Star Shell
Support Item Emergency Repair Personnel (Repair Goddess· Combat Ration ((Special Onigiri) · Canned Saury· Underway Replenishment
Personnel and Facility Fleet Command Facility (Striking Force· Ship Repair Facility · Skilled Carrier-based Aircraft Maintenance Personnel · Night Operation Aviation Personnel (+ Skilled Deckhands· Skilled Lookouts