Jets were introduced in the December 9th, 2016 Update. Jets possess the ability to perform a Jet Assault before the aerial combat phase.

In their current form, "Jets" refer to "Turbojet propelled fighter-bombers".

Mechanics

1. Two "jets" are currently available in the game, the Kikka Kai and the Jet Keiun Kai.

Both jets have unique equipment icons : and respectively
Despite being propelled by one jet engine, the FR-1 Fireball has nothing to do with "jets" in the game and is seen as a regular fighter.

2. Jets can only be equipped by Shoukaku Kai Ni A, Zuikaku Kai Ni A, Kaga Kai Ni Go, and Victorious Kai, and placed in Land-Based Air Squadrons.

3. Using jets will consume steel in addition to bauxite.

4. Having a jet equipped will allow a pre-emptive aerial attack known as Jet Assault (JA).

Jets will still participate in the following aerial combat phases.
Damage during the jet assault is calculated the same way as dive bombers (x1.0), but damage during the airstrike phase is reduced (x0.7071).
- For LBAS jet assault, both jet assault and LBAS bombing use the lower multiplier.

5. Equipping at least 1 Jet on a CV/B will increase its range from Medium to Long.

6. Jets have a high shootdown resistance that reduces the losses to anti-air fire.

Plane	Air State Modifier	Ship AA Modifier	Fleet AA Modifier
Jet Keiun Kai	0.6	0.5	0.7
Kikka Kai	0.6	0.5	0.5

7. Jets will go through three different shoot-down phases per normal battle.

Anti-air during the Jet Assault.
Shoot down during Air Control.
Anti-air during the normal airstrike.

The jet assault phase cannot trigger AACI.

8. Jets do not count as Dive Bombers nor Fighters, and so cannot activate the CVCI or take part in it.

Steel Cost

The steel consumption of jets is:

[math]\displaystyle{ \text{Jet Phase Cost} = \sum^{\text{All Jets}} \lceil \text{Plane Count} \times \text{Steel Cost} \rceil }[/math]

[math]\displaystyle{ \text{Plane Count} }[/math] is the current plane count at the start of the battle.
[math]\displaystyle{ \text{Steel Cost} }[/math] is the steel cost per plane.
- Kikka Kai: 2.6
- Jet Keiun Kai: 2.8

Notes:

Take note that the costs are rounded up.
Jets only cost steel in nodes where they are used for jet assaults and airstrikes.
- Night battles will not cost steel.
Steel is consumed upon returning to base.
- This means jets can still be used even when having not enough steel for the sortie.
Because LBAS squadrons are refilled between waves, jets will always cost the full 18 planes per wave.

Use Notes

Since they use the dive bomber multiplier and have a weaker airstrike per plane, making their use against larger targets is limited if used alone.
They are two of the three "fighter-bombers" with shoot-down resistance. This makes them useful when needing to maximize fighter power while maintaining some striking power.
- Jets are the fighter-bombers with the highest AA and Dive Bombing in-game, and among the only planes to provide Range .
- This usefulness is relative, since they cannot be used in the CVCI.
The steel cost can add up very quickly, especially when being equipped on the largest slots of the CV.
- Note that equipping them in smaller slots limits their ability to contribute to air control and damage.

Acquiring Jets

Currently, the only way to acquire Jets is by obtaining several special items from Quests or ranking, that are necessary to obtain the Kikka Kai and produce the Jet Keiun Kai :

Ne-Type Engine (D21 & F47)

New Air Craft Plans (D20 & G5)

Those items are notably given in the following quest chains:

F43+A62>F45>F46
D2+D6>D20>D21>F47

Quest info		Rewards
G5 航空艤装の近代化改修 Modernization Improvement of Flight Rigging		0	0	0	0
Prepare 5,500 Steel and 2,500 Bauxite and make modernization improvements to a Standard Carrier twice using x 5 Aircraft Carrier Ships. Modernize a CV(B) using 5 CV(L) twice, and prepare 5,500 steel and 2,500 bauxite.		New Technology Aircraft Blueprint
Notes	Requires: B87, G3 Steel and bauxite will be consumed upon completion.	New Technology Aircraft Blueprint

D20 潜水艦派遣作戦による航空機技術入手 Obtain Airplane Technology from Submarine Dispatch Operation		0	100	0	100
Deploy a Submarine Dispatch Operation to obtain new Plane Technology! Complete expeditions 30 and 31.		New Technology Aircraft Blueprint
Notes	Requires: D2, D6 The quest will be displayed as 50% complete if Expedition 30 is completed first, and as 80% complete if Expedition 31 is completed first. Either way, both expeditions need to be completed.	New Technology Aircraft Blueprint

D21 潜水艦派遣作戦による噴式技術の入手 Obtain Jet Engine Technology from Submarine Dispatch Operation		100	0	0	100
Prepare 5,000 steel and 1,500 bauxite to bring in the new Jet Engine Technology through a Submarine Dispatch Operation. Complete expeditions 30 and 31, and prepare 5,000 steel and 1,500 bauxite.		Development Material 2x Ne Type Engine
Notes	Requires: B88, D20 Steel and Bauxite will be consumed upon completion.	Development Material 2x Ne Type Engine

F47 ネ式エンジンの増産 Increased Production of Ne Type Engine		0	0	0	0
To prepare to increase the production of engines for the jet aircraft, dispose of 3 Type 52 Zero Fighter in the factory, prepare 2 Reppuu and Ryuusei each and 8,000 steel. Scrap 3 Type 52 Zero Fighter and prepare 2 Prototype Reppuu Late Model, 2 Ryuusei, and 8,000 steel.		Ne Type Engine
Notes	Requires: D21, F45 Resources and equipment will be consumed upon completion.	Ne Type Engine

Kikka Kai

The Kikka Kai is obtainable once with F46, and up to one per year via the yearly quest By10.

Quest info		Rewards
F46 噴式戦闘爆撃機の開発 Develop the Jet Fighter-Bomber		0	0	0	100
To Produce the new type Fighter-Bomber with the built-in Ne Type Engines, dispose 3 Shiden Kai 2 in the factory and prepare 2 New Technology Aircraft Blueprint and 1 Ne Type Engine. Scrap 3 Shiden Kai 2 and prepare 2 New Technology Aircraft Blueprints and 1 Ne Type Engine.		Development Material 2x Kikka Kai
Notes	Requires: C3, F45 The Ne Type Engine and New Technology Aircraft Blueprints will be consumed upon completion.	Development Material 2x Kikka Kai

By10 機動部隊決戦 Naval Task Force Decisive Battle		1300	1300	0	1300
Organize a fleet with an Aircraft Carrier as part of your first fleet, then proceed into the Coral Sea Area, Eastern Salmon Sea, the KW Atoll, and the waters around Peacock Island. Confront the main enemy in the area and destroy them several times! Assemble a fleet containing 1 CV(L/B) as Secretary and up to 5 XX, then S rank the boss nodes of 5-2, 5-5, and 6-5 twice each, and A+ rank the boss node of 6-4 twice.		Ranking Point Reward 600x Choose between: Skilled Crew Member 5x Prototype Flight Deck Catapult Kikka Kai
Notes	Requires: B153, By9 Yearly Quest (June)

Jet Keiun Kai

The Jet Keiun Kai is obtainable by upgrading a Prototype Keiun via Akashi's Improvement Arsenal, also consuming a Ne Type Engine.

Up to two Prototype Keiun can be obtained via quests F45 and B143.

Quest info		Rewards
F45 新機軸偵察機の開発 Develop the New Reconnaissance Plane		0	0	0	100
To produce the New Reconnaissance Plane, dispose 2 Type 0 Recon Seaplane in the factory and prepare one Type 1 Land Attacker and two Saiun! Scrap 2 Type 0 Recon Seaplane and prepare 1 Type 1 Land-based Attack Aircraft and 2 Saiun.		Prototype Keiun (Carrier-based Reconnaissance Model) Development Material 2x
Notes	Requires: A62, F43 Equipment will be consumed upon completion.

B143 「第五航空戦隊」、縦横無尽！ 5th Carrier Division, Go Wild!		0	0	0	1000
Organize the 5th Carrier Division mobile task force fleet consisting mainly of the carriers Shoukaku and Zuikaku, along with the escort Destroyer Oboro and Akigumo. With said fleet, sortie into the Northern AL Area, Off the Coral Sea, Off the Tawi-Tawi Anchorage area, and the Off the KW Atoll. Locate the main enemy fleet and destroy them. Assemble a fleet containing Shoukaku, Zuikaku, Oboro, Akigumo, and up to 2 XX, then S rank the boss nodes of 3-5, 5-2, 7-2 (Part 2), and 6-5.		Choose between: Underway Replenishment 2x Instant Repair Material 6x 25mm Triple Autocannon Mount 2x Then choose between: Prototype Toukai Prototype Keiun (Carrier-based Reconnaissance Model)
Notes	Requires: D21

From there, once in possession of a Prototype Keiun, the upgrade through Akashi's Improvement Arsenal can begin:

Type	Name	★	Resource							Day							2nd Ship	Note
Type	Name	★								Sun	Mon	Tue	Wed	Thu	Fri	Sat	2nd Ship	Note
	Prototype Keiun	0	250	100	700	650	8/10	6/8	1x	Z	Z	S Z	S	X	X	X	Shoukaku Kai Ni A Zuikaku Kai Ni A	Upgrades to Jet Keiun Kai
		6					10/15	7/10	1x
		10					20/30	10/13	1x

Limited availability

Some jet parts have been given during some limited-time quests or events, and also as ranking rewards.

The Prototype Keiun has been given in the following ranking months :

month	Rank 1-5	Rank 6-20	Rank 21-100	Rank 101-500
September 2015	1	1	0	0
October 2015	1	1	1	1
October 2016	1	1	1	1
January 2020	1 ★+4	1 ★+4	1	1

The Kikka Kai has been given in the following ranking months :

month	Rank 1-5	Rank 6-20	Rank 21-100	Rank 101-500
January 2020	1	0	0	0
April 2020	1	0	0	0

The Ne Type Engine has been given in the following ranking months :

month	Rank 1-5	Rank 6-20	Rank 21-100	Rank 101-500
November 2015	2	1	1	1
December 2015	1	0	0	0
April 2017	1	0	0	0

Both the 2020 and 2021 Hishimochi mini-events gave several Ne Type Engines and New Technology Aircraft Blueprints in quests :

Hinamatsuri 2020 Mini-Event as part of one "Weekly Quest" and three "One-Time Quests"

Quest info		Rewards
20WiG6 【桃の節句任務】菱餅改修：週 (Peach Festival Mission) Hishimochi Renovation: Weekly		0	0	0	0
Prepare 6 Hishimochi,100 development materials, 3000 Bauxite, and 3000 steel and proceed to modernize any light carrier with 3 light carriers 2 times. *All prepared items will be consumed upon completion Prepare 6 Hishimochi,100 development materials, 3000 Bauxite, and 3000 steel and successfully modernize 1 CVL using 3 CVL 2 times.		Choose between: New Technology Aircraft Blueprint New Model Gun Mount Improvement Material New Model Rocket Development Material Then choose between: Instant Repair Material 6x Improvement Material 3x Food Supply Ship Irako 3x
Notes	Requires: 20WiG5, 20WiB4, 20WiB4 Weekly Quest

20WiG4 【桃の節句任務】菱餅改修：序 (Peach Festival Mission) Hishimochi Renovation: Intro		0	0	0	0
Prepare 10 Hishimochi and proceed to modernize any Yuugumo-class Destroyer with 4 Heavy Cruiser 2 times. All prepared items will be consumed upon completion* Prepare 10 Hishimochi and successfully modernize a Yuugumo-class DD using 4 CAs 2 times.		Choose between: Action Report New Model Gun Mount Improvement Material 2x Ne Type Engine
Notes	Requires: 20WiB1, 20WiB2, 20WiB2 One-time

20WiG5 【桃の節句任務】菱餅改修：破 (Peach Festival Mission) Hishimochi Renovation: Midpoint		0	0	0	0
Prepare 15 Hishimochi, 8000 Bauxite, and 8000 steel and proceed to modernize the Yuugumo-class Destroyer Okinami with 4 Battleships 2 times. All prepared items will be consumed upon completion* Prepare 15 Hishimochi, 8000 Bauxite, and 8000 steel and successfully modernize Okinami using 4 BBs 2 times.		Choose between: Remodel Blueprint New Technology Aircraft Blueprint 2x Prototype Flight Deck Catapult
Notes	Requires: 20WiB3, 20WiG4, 20WiG4 One-time

20WiG7 【桃の節句任務】菱餅改修：果 (Peach Festival Mission) Hishimochi Renovation: Final		0	0	0	0
Prepare 17 Hishimochi, 300 development materials, 15000 Bauxite, and 15000 steel and proceed to modernize any Standard carrier with 5 standard carriers 2 times. *All prepared items will be consumed upon completion Prepare 17 Hishimochi, 300 development materials, 15000 Bauxite, and 15000 Steel and successfully modernize 1 CV using 5 CV 2 times.		Choose between: Prototype Flight Deck Catapult Ne Type Engine Night Operation Aviation Personnel + Skilled Deckhands
Notes	Requires: 20WiG6 One-time

Hishimochi Mini-Event as part of the "Exchange Quests"

Quest info		Rewards
2103 G4 【桃の節句】菱餅改修：2021空 (Hinamatsuri Operation) Hishimochi Modernization: 2021 Sky		0	0	0	0
Hinamatsuri Operation: Prepare 7 Hishimochi, 90 Development Materials, 9000 fuel and 9000 bauxite. Successfully modernize a CV ship with 5 CVL at the same time, twice. Only CVs can work for the modernization process CVB will not work		Choose between: Prototype Flight Deck Catapult Ne Type Engine 2x New Technology Aircraft Blueprint 4x
Notes	Requires: 2103 G2, 2103 B3 Time-limited Quest 7 Hishimochi, 9000 Fuel and bauxite, and 90 Development Materials will be consumed upon completion of this quest

The limited Xmas quests of 2021 included a Prototype Keiun and its Ne Type Engine among the rewards :

Quest info		Rewards
2112 LB03 【Xmas限定】聖夜の翼、出撃せよ！ [Christmas limited] Wings of the Holy Night, sortie!		0	0	1224	1224
Limited Time Christmas Mission: Organize a fleet consisting of 3 of the following ships "Shoukaku, Zuikaku, and Hayasui" or "Suzuya, Kumano, and Gotland". Do repeat sorties in the Okinoshima sea area, the Northern AL Operation Area, and the Coral Sea! Confront and destroy the enemy fleet! Use a fleet including "Shoukaku, Zuikaku, and Hayasui" or "Suzuya, Kumano, and Gotland", and up to 3 XX, and S rank the following maps twice: 2-4, 3-5, 5-2.		Choose between: Type 1 Land-based Attack Aircraft 2x Shinzan Prototype Keiun (Carrier-based Reconnaissance Model) Then Choose between: Skilled Crew Member 2x New Model Aerial Armament Material 2x Ne Type Engine
Notes	Requires: 2112 LB01 Limited Time Quest Kumano and Suzuya can be used in their CVL form.

Music track
-	Source	Japanese	Romanization	English	OST Release	Notes
Play	Akashi's Improvement Arsenal (when improving jets)	「噴式の胎動」	Funshiki no Taidou	Birth of the Jets	OST 波

Jets

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