Introduction

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

Overview

Mechanics

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

Both jets have unique equipements 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-class Kai Ni A, Kaga Kai Ni Go, 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 but damage during the airstrike phase is reduced.
- For LBAS jet assault, both jet assault and LBAS bombing use the lower multiplier.

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

	Ship AA resistance	Fleet AA resistance
Keiun kai	50%	30%
Kikka kai	50%	50%

6. 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.

It is unknown if the jet assault phase can trigger anti-air cut-ins.

7. Jets do not count as dive bombers or fighters and so cannot activate the Carrier Cut-In Attacks or take part in it.

Use Notes

1. Since they use the dive bomber multiplier and have a weaker airstrike, their use against targets larger than a heavy cruiser is limited.

2. They are two of the three fighter-bombers with shoot down resistance. This makes them useful when needing to maximise fighter power while maintaining some striking power. The Kikka Kai is fighter-bomber with the highest anti-air in game.

This usefulness is limited because they cannot be used to trigger CVCI.

3. The steel cost can add up very quickly. Especially when being equipped on the largest slots of Shoukaku and Zuikaku.

Note that equipping them in smaller slots limits their ability to contribute to air control and damage.

Steel Cost

The steel consumption of jets is:

[math]\displaystyle{ \text{Steel} = \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: [math]\displaystyle{ 2.6 }[/math]
- Jet Keiun Kai: [math]\displaystyle{ 2.8 }[/math]

Important 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 if you don't have enough steel for the sortie.
Because LBAS squadrons are refilled between waves, jets will always cost the full 18 planes per wave.

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

New Air Craft Plans

Prototype Keiun

Kikka Kai

The Kikka Kai is obtainable one by completing the following quest chain, and can be obtained up to 1 per year via the yearly quest By10.

The total resources required to complete the quest chain are:

18,500 Steel
4,000 Bauxite
1x Ne-type Engine (obtained during the quest chain)
2x New Aircraft Blueprint (obtained during the quest chain)
3x Shiden Kai 2
2x Prototype Reppuu Late Model
2x Ryuusei

Completing this quest chain gives you an extra Ne-type Engine for upgrading the Keiun.

Quest info		Rewards
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! Send a Submarine Fleet of 4 subs or more to Expedition 30 and Expedition 31 successfully complete them. Note: Display may change depending on which quest is completed first if Expedition 30 is complete it'll display as 50% complete. If Expedition 31 is completed first, it'll display at 80% complete. Either way, both expeditions need to be completed.		New Technology Aircraft Blueprint
Notes	Requires: D2, D6 Quest must be activated before Expedition Fleet's return to be considered complete.	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 5000 steel and 1500 bauxite to bring in the new Jet Engine Technology through a Submarine Dispatch Operation. (Resources will be consumed upon completion of quest) Send a Submarine Fleet of 4 subs or more to Expedition 30 and Expedition 31 successfully complete them.		Development Material 2x Ne Type Engine
Notes	Requires: B88, D20 Quest must be activated before Expedition Fleet's return to be considered complete. 5000 steel and 1500 Bauxite will be consumed upon completion of the quest	Development Material 2x Ne Type Engine

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. (Upon completion, previously noted items will be consumed upon completion of quest) Scrap 3 Shiden Kai 2 and have 2 New Technology Aircraft Blueprint and 1 Ne Type Engine in your inventory upon activating the quest.		Development Material 2x Kikka Kai
Notes	Requires: F45, C3 One Ne Type Engine and two New Technology Aircraft Blueprint will be consumed upon completion of quest	Development Material 2x Kikka Kai

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 3 Type 52 Zero Fighter in the factory, prepare 2 Reppuu and Ryuusei each and 8,000 steel. (Upon completion of quest, the equipment and resources needed will be comsumed.) Scrap 3 Type 52 Zero Fighter and have two Reppuu, two Ryuusei and 8,000 steel in your inventory while the quest is activated.		Ne Type Engine
Notes	Requires: D21 Two Reppuu, two Ryuusei and 8,000 steel will be consumed from your inventory upon completion of quest	Ne Type Engine

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 improvement to a Standard Carrier twice using x 5 Aircraft Carrier Ships. (Resources will be consumed upon the completion of quest.) Modernize a Standard Carriers using a total of 5 CVL/CV for each modernization twice while the quest is activated.		New Technology Aircraft Blueprint
Notes	Requires: B87, G3 5,500 steel and 2,500 Bauxite will be consumed upon completion of quest.	New Technology Aircraft Blueprint

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! Organize the first fleet consisting of 1 CV(L)(B) as flagship and up to 5 XX, then score S rank on the boss nodes of 5-2, 5-5 and 6-5 twice, and score A+ rank on the boss of 6-4 twice.		Ranking Point Reward 600x Choose between: Skilled Crew Member 5x Prototype Flight Deck Catapult Kikka Kai
Notes	Requires: By9, B153 Yearly Quest (June)

Jet Keiun Kai

The Jet Keiun Kai is obtainable by upgrading a Prototype Keiun via Akashi's Improvement Arsenal.

Up to two Prototype Keiun can be obtained via quests, and some have also been given as ranking rewards.

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! (Required Equipment will be consumed upon completion of quest) Scrap 2 Type 0 Recon Seaplane and have 1 Type 1 Land Attacker and 2 Saiun in your equipment inventory upon activating the quest.		Prototype Keiun (Carrier-based Reconnaissance Model) Development Material 2x
Notes	Requires: F43, A62 one Type 1 Land Attacker and two Saiun will be consumed upon completion of quest

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. Organize a fleet with Shoukaku, Zuikaku, Oboro, and Akigumo , then score an S rank on 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

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 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

From there, once you have the Prototype Keiun, you can begin to upgrade it through Akashi's Improvement Arsenal :

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

Jets

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