Construction

Construction Menu as shown

Large Ship Construction Menu as shown

Construction is accessible from the Arsenal menu and allows building new ship girls. Note that not all ships are available from construction, some being drops from normal maps, and others event exclusive (see below for details).

• For a more comprehensive list of construction recipes and rates, please see PoiDB's construction page.

Constructing a girl costs a selectable amount of the 4 main Resources as well as "development materials" . It will also take a variable amount of time unless instant constructions are used.

• Every player starts off with only 2 construction slots. Up to 2 more slots can be unlocked by using a Dock Opening Key for each.

Construction Types

Two types of ship construction are possible, "Normal Construction" and "Large Ship Construction" (LSC), the former being the most used and cheaper one, and the later being the most expensive with the greatest results.

Normal Construction

"Normal Construction" is the basic construction method. Recipes range from 30-999 fuel , ammo , steel and bauxite and each attempt costs 1 development material . Speeding up construction costs 1 instant construction .

• If applicable, it is often more resource efficient to find a desired ship in sorties as a drop rather than building them.

Construction Theory

In normal construction, there are 4 pools determining the ship being crafted. Each group has exactly 100 unique ships and the available pools remain the same regardless of which Secretary used (excepted for the Z1-class). The selection of a pool is based on the resource input during the construction:

• Pool 1 - 300+ , 400+ , 300+ ,
• Pool 2 - 400+ , 600+ ,
• Pool 3 - 250+ , 200+ ,
• Pool 4 - Do not meet any of the above requirements.
• Note: The check is done from top to bottom, if the requirements of multiple pools are fulfilled, only the topmost one is used.

The constructed ship is selected in the pool by a value called "[math]\displaystyle{ ID }[/math]" which can go from 1 to 100, calculated by substating two random values:

[math]\displaystyle{ ID }[/math] Calculation
[math]\displaystyle{ ID = Rand [0 ; 100] - Rand [0 ; Res - 1] }[/math] With [math]\displaystyle{ Rand }[/math] the function returning a random whole number between its boundaries, included, [math]\displaystyle{ Res }[/math] a whole number that is incremented by having low/high resource inputs of certain types, defined below, The resources used to increment this value depend on the pool that has been selected. In case [math]\displaystyle{ ID }[/math] is 0 or negative, the value will be converted back into a positive value and incremented by 2.
Which resources that are used to increment value [math]\displaystyle{ Res }[/math] is dependent on the pool that has been selected: Pool 1: [math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Steel-400}{25} \Bigg\rceil + \Bigg\lceil \frac{Baux-300}{20} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math] Pool 2: [math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Ammo-400}{25} \Bigg\rceil + \Bigg\lceil \frac{Steel-600}{30} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math] Pool 3: [math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Ammo-200}{13} \Bigg\rceil + \Bigg\lceil \frac{Steel-200}{20} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math] Pool 4: [math]\displaystyle{ Res = MAX \Bigg( \Bigg| \Bigg\lceil \frac{Fuel-100}{10} \Bigg\rceil + \Bigg\lceil \frac{Steel-30}{15} \Bigg\rceil \Bigg| ; 51\Bigg) }[/math] Source: [1]

Pratical Conclusion

• Only 2 resources will have an effect depending on the pool. Changing the two others will have no effect as long as it does not change the pool.
• Of the two resources that have an effect, one has a bigger effect than the other.
  • The effect is capped, above a certain threshold increasing the resources further will not have any effect.
• The effect of changing resources will increase the drop of some ships by reducing the drop of others.
• The direct consequence of the round-up is that the effect of resources works by steps starting from the minimum recipe plus one.
  • Increasing the resource of a recipe by an amount inferior to the step has no effect.
  • The steps are as follows:
    • Pool 1: 25 , 20
    • Pool 2: 25 , 30
    • Pool 3: 13 , 20
    • Pool 4: 10 , 15

Construction Pools

Construction Pools List
Ship	Name	Type	Pool 4 "Light"	Pool 3 "Special"	Pool 2 "Heavy"	Pool 1 "Aviation"
	Mutsuki	DD	✔️	❌	❌	❌
	Kisaragi	DD	✔️	❌	❌	❌
	Satsuki	DD	✔️	❌	❌	❌
	Fumizuki	DD	✔️	❌	❌	❌
	Nagatsuki	DD	✔️	❌	❌	❌
	Kikuzuki	DD	✔️	❌	❌	❌
	Mikazuki	DD	✔️	❌	❌	❌
	Mochizuki	DD	✔️	❌	❌	❌
	Yayoi	DD	✔️	❌	❌	❌
	Fubuki	DD	✔️	❌	❌	✔️
	Shirayuki	DD	✔️	❌	❌	✔️
	Hatsuyuki	DD	✔️	❌	❌	✔️
	Miyuki	DD	✔️	❌	❌	✔️
	Murakumo	DD	✔️	❌	❌	✔️
	Isonami	DD	✔️	❌	❌	✔️
	Ayanami	DD	✔️	❌	❌	✔️
	Shikinami	DD	✔️	❌	❌	✔️
	Oboro	DD	✔️	❌	❌	❌
	Akebono	DD	✔️	❌	❌	❌
	Sazanami	DD	✔️	❌	❌	❌
	Ushio	DD	✔️	❌	❌	❌
	Akatsuki	DD	✔️	❌	❌	✔️
	Hibiki	DD	✔️	❌	❌	✔️
	Ikazuchi	DD	✔️	❌	❌	✔️
	Inazuma	DD	✔️	❌	❌	✔️
	Hatsuharu	DD	✔️	❌	❌	✔️
	Nenohi	DD	✔️	❌	❌	❌
	Wakaba	DD	✔️	❌	❌	❌
	Hatsushimo	DD	✔️	❌	❌	❌
	Shiratsuyu	DD	✔️	❌	❌	✔️
	Shigure	DD	✔️	❌	❌	✔️
	Murasame	DD	✔️	❌	❌	❌
	Yuudachi	DD	✔️	❌	❌	❌
	Samidare	DD	✔️	❌	❌	❌
	Suzukaze	DD	✔️	❌	❌	✔️
	Asashio	DD	✔️	❌	❌	❌
	Ooshio	DD	✔️	❌	❌	❌
	Michishio	DD	✔️	❌	❌	❌
	Arashio	DD	✔️	❌	❌	❌
	Arare	DD	✔️	❌	❌	❌
	Kasumi	DD	✔️	❌	❌	❌
	Kagerou	DD	✔️	❌	❌	✔️
	Shiranui	DD	✔️	❌	❌	✔️
	Kuroshio	DD	✔️	❌	❌	❌
	Akigumo	DD	✔️	❌	❌	✔️
	Yukikaze	DD	❌	✔️	❌	❌
	Shimakaze	DD	❌	✔️	❌	❌
	Z1	DD	❌	✔️	❌	❌
	Z3	DD	❌	✔️	❌	❌
	Tenryuu	CL	✔️	✔️	❌	❌
	Tatsuta	CL	✔️	✔️	❌	❌
	Kuma	CL	✔️	✔️	✔️	✔️
	Tama	CL	✔️	✔️	✔️	✔️
	Kitakami	CL	✔️	✔️	✔️	✔️
	Ooi	CL	❌	✔️	❌	❌
	Kiso	CL	✔️	✔️	✔️	✔️
	Nagara	CL	✔️	✔️	✔️	✔️
	Isuzu	CL	✔️	✔️	✔️	✔️
	Natori	CL	✔️	✔️	✔️	✔️
	Yura	CL	✔️	✔️	✔️	❌
	Kinu	CL	❌	✔️	❌	✔️
	Abukuma	CL	❌	✔️	❌	✔️
	Sendai	CL	✔️	✔️	✔️	✔️
	Jintsuu	CL	✔️	✔️	✔️	✔️
	Naka	CL	✔️	✔️	✔️	✔️
	Yuubari	CL	✔️	❌	❌	✔️
	Katori	CT	❌	✔️	❌	❌
	Furutaka	CA	❌	✔️	✔️	❌
	Kako	CA	❌	✔️	✔️	✔️
	Aoba	CA	❌	✔️	✔️	❌
	Kinugasa	CA	❌	✔️	✔️	❌
	Myoukou	CA	❌	✔️	✔️	❌
	Nachi	CA	❌	✔️	✔️	❌
	Ashigara	CA	❌	✔️	✔️	❌
	Haguro	CA	❌	✔️	✔️	❌
	Takao	CA	❌	✔️	✔️	❌
	Atago	CA	❌	✔️	✔️	❌
	Maya	CA	❌	✔️	✔️	❌
	Choukai	CA	❌	✔️	✔️	❌
	Mogami	CA	❌	✔️	✔️	✔️
	Kumano	CA	❌	❌	✔️	❌
	Suzuya	CA	❌	❌	✔️	❌
	Tone	CA	❌	✔️	✔️	✔️
	Chikuma	CA	❌	✔️	✔️	✔️
	Kongou	FBB	❌	❌	✔️	❌
	Hiei	FBB	❌	❌	✔️	❌
	Haruna	FBB	❌	❌	✔️	❌
	Kirishima	FBB	❌	❌	✔️	❌
	Fusou	BB	❌	❌	✔️	❌
	Yamashiro	BB	❌	❌	✔️	❌
	Ise	BB	❌	❌	✔️	❌
	Hyuuga	BB	❌	❌	✔️	❌
	Nagato	BB	❌	❌	✔️	❌
	Mutsu	BB	❌	❌	✔️	❌
	Shouhou	CVL	❌	❌	❌	✔️
	Ryuujou	CVL	❌	❌	❌	✔️
	Shouhou	CVL	❌	❌	❌	✔️
	Zuihou	CVL	❌	❌	❌	✔️
	Hiyou	CVL	❌	❌	❌	✔️
	Junyou	CVL	❌	❌	❌	✔️
	Akagi	CV	❌	❌	❌	✔️
	Kaga	CV	❌	❌	❌	✔️
	Souryuu	CV	❌	❌	❌	✔️
	Hiryuu	CV	❌	❌	❌	✔️
	Shoukaku	CV	❌	❌	❌	✔️
	Zuikaku	CV	❌	❌	❌	✔️
	I-168	SS	❌	✔️	❌	❌
	I-8	SS	❌	✔️	❌	❌
	I-58	SS	❌	✔️	❌	❌
	Chitose	AV	❌	❌	❌	✔️
	Chiyoda	AV	❌	❌	❌	✔️

Large Ship Construction

"Large Ship Construction" (LSC) allows to build rarer "bigger" ships in exchange for more resources. Recipes range from 1500-7000 fuel and ammo ; 2000-7000 steel and 1000-7000 bauxite . Each attempt also costs either 1, 20, or 100 development materials . Speeding up construction costs 10 instant construction .

• LSC is unlocked by completing quest F10.
• According to the developers, having empty construction docks very slightly increases the chances of obtaining rarer ships [2]. This statement has not been fully tested yet.

• Construction results are solely determined by the amount of resources and devmats used.
  • For few ships, an exact Secretary is required in order to be built, see below.

LSC Construction Theory

LSC works similarly to normal construction, there are 4 pools determining the ship being crafted. Each group has exactly 100 unique ships and the available pools remain the same regardless of which Secretary used The selection of a pool is based on the resource input during the construction:

• Pool 1 - > [math]\displaystyle{ 2400+Rand[0;1200] }[/math], > [math]\displaystyle{ 1050+Rand[0;900] }[/math], > [math]\displaystyle{ 2800+Rand[0;1400] }[/math], > [math]\displaystyle{ 2800+Rand[0;2400] }[/math];
• Pool 2 - > [math]\displaystyle{ 2240+Rand[0;1120] }[/math], > [math]\displaystyle{ 2940+Rand[0;2520] }[/math], > [math]\displaystyle{ 4400+Rand[0;2200] }[/math], > [math]\displaystyle{ 1050+Rand[0;900] }[/math], > 20;
• Pool 3 - > [math]\displaystyle{ 1920+Rand[0;960] }[/math], > [math]\displaystyle{ 2240+Rand[0;1920] }[/math], > [math]\displaystyle{ 3040+Rand[0;1520] }[/math], > [math]\displaystyle{ 910+Rand[0;780] }[/math];
• Pool 4 - Do not meet any of the above requirements.
• Note: The check is done from top to bottom, if the requirements of multiple pools are fulfilled, only the topmost one is used.

The constructed ship is selected in the pool by a value called "[math]\displaystyle{ ID }[/math]" which can go from 1 to 100, calculated by subtracting two random values:

[math]\displaystyle{ ID }[/math] Calculation
[math]\displaystyle{ ID = Rand [a ; b] - MAX \big( Rand [0 ; Res - 1] ; 50 \big) }[/math] With [math]\displaystyle{ a,b }[/math] depend on the number of construction docks "open" (either empty or finished): [math]\displaystyle{ a,b }[/math] Nb dock [math]\displaystyle{ a }[/math] [math]\displaystyle{ b }[/math] 1 3 99 2 1 99 3 1 95 4 1 91 [math]\displaystyle{ Rand }[/math] the function returning a random whole number between its boundaries, included, [math]\displaystyle{ Res }[/math] a whole number that is incremented by having low/high resource inputs of certain types, defined below, The resources used to increment this value depend on the pool that has been selected. Note that if [math]\displaystyle{ Res\lt 1 }[/math] then the result of [math]\displaystyle{ Rand [0 ; Res - 1] }[/math] is zero. In case [math]\displaystyle{ ID }[/math] is 0 or negative, the value will be converted back into a positive value and incremented by 2.
In LSC every resource (including ) are used to increment value [math]\displaystyle{ Res }[/math] only the weight depend on the pool: Pool 1: [math]\displaystyle{ Res = \big[ (Fuel-3000) \times 0.003 \big] + \big[ (Ammo-2000) \times 0.003 \big] + \big[ (Steel-4000) \times 0.004 \big] + \big[ (Baux-5000) \times 0.005 \big] + \big[ (DevMat-50) \times 0.1 \big] }[/math] Pool 2: [math]\displaystyle{ Res = \big[ (Fuel-3500) \times 0.003 \big] + \big[ (Ammo-4500) \times 0.005 \big] + \big[ (Steel-5500) \times 0.004 \big] + \big[ (Baux-2200) \times 0.002 \big] + \big[ (DevMat-60) \times 0.1 \big] }[/math] Pool 3: [math]\displaystyle{ Res = \big[ (Fuel-4000) \times 0.003 \big] + \big[ (Ammo-3000) \times 0.003 \big] + \big[ (Steel-4000) \times 0.003 \big] + \big[ (Baux-1800) \times 0.002 \big] + \big[ (DevMat-40) \times 0.2 \big] }[/math] Pool 4: [math]\displaystyle{ Res = \big[ (Fuel-2000) \times 0.002 \big] + \big[ (Ammo-2500) \times 0.002 \big] + \big[ (Steel-3000) \times 0.002 \big] + \big[ (Baux-1500) \times 0.002 \big] + \big[ (DevMat-40) \times 0.2 \big] }[/math] Note The value between [math]\displaystyle{ \big[ x \big] }[/math] is round down if it's positive and round up if it's negative ([1.5] -> 1 ; [-1.5] -> -1) Source: [3]

Large Ship Construction Pools

Large Ship Constructions Pools List
N°	Ship	Name	Type	Pool 4	Pool 3	Pool 2	Pool 1
163		Maruyu	SS	✔️	✔️	✔️	✔️
155		I-401	SSV	❌	✔️	❌	❌
137		Agano	CL	✔️	✔️	✔️	❌
138		Noshiro	CL	✔️	✔️	✔️	❌
139		Yahagi	CL	✔️	✔️	✔️	❌
154		Katori	CT	✔️	❌	❌	❌
265		Kashima	CT	?	?	?	?
51		Mogami	CA	✔️	❌	❌	❌
116		Mikuma	CA	✔️	❌	❌	❌
124		Suzuya	CA	✔️	✔️	❌	❌
125		Kumano	CA	✔️	✔️	❌	❌
63		Tone	CA	✔️	❌	❌	❌
64		Chikuma	CA	✔️	❌	❌	❌
248		Zara	CA	❌	✔️	❌	❌
21		Kongou	FBB	✔️	✔️	✔️	❌
22		Hiei	FBB	✔️	✔️	✔️	❌
23		Haruna	FBB	✔️	✔️	✔️	❌
24		Kirishima	FBB	✔️	✔️	✔️	❌
171		Bismarck	FBB	❌	❌	✔️	❌
26		Fusou	BB	✔️	✔️	✔️	❌
27		Yamashiro	BB	✔️	✔️	✔️	❌
3		Ise	BB	✔️	✔️	✔️	❌
4		Hyuuga	BB	✔️	✔️	✔️	❌
1		Nagato	BB	✔️	✔️	✔️	❌
2		Mutsu	BB	✔️	✔️	✔️	❌
131		Yamato	BB	❌	✔️	✔️	❌
143		Musashi	BB	❌	❌	✔️	❌
239		Warspite	BB	❌	❌	✔️	❌
30		Ryuujou	CVL	❌	❌	❌	✔️
65		Hiyou	CVL	❌	❌	❌	✔️
66		Junyou	CVL	❌	❌	❌	✔️
94		Shouhou	CVL	❌	❌	❌	✔️
112		Zuihou	CVL	❌	❌	❌	✔️
6		Akagi	CV	❌	❌	❌	✔️
7		Kaga	CV	❌	❌	❌	✔️
8		Souryuu	CV	❌	❌	❌	✔️
9		Hiryuu	CV	❌	❌	❌	✔️
106		Shoukaku	CV	❌	❌	❌	✔️
107		Zuikaku	CV	❌	❌	❌	✔️
153		Taihou	CV	❌	❌	❌	✔️
233		Saratoga	CV	❌	❌	❌	✔️
315		Ark Royal	CV	❌	❌	❌	✔️
251		Mizuho	AV	❌	❌	❌	✔️
161		Akitsu Maru	LHA	❌	✔️	✔️	✔️
162		Kamoi	AO	❌	❌	❌	✔️
260		Hayasui	AO	?	?	?	?

Special Secretary

Some ships require a specific Secretary (1st fleet flagship) in order to be crafted.

• For any other construction, the Secretary is independent of the crafting result.

Special Construction Requirements
	Required Secretary	Ship added to craft pool	Notes
Normal Construction	Z1	Z3	Quest D8 MUST be completed first.[citation needed]
	Z3	Z1
Large Ship Construction	Z1 Z3	Bismarck
	Libeccio Pola	Zara
	Kamoi Iowa	Saratoga
	Kongou Kai Ni	Warspite	Kongou must be Kai Ni/C
	Warspite	Ark Royal

Construction Timers

The times below reflect the type of ship or specific ship you will obtain after hitting the build button.

Time	Ship Type	Result	Note
00:17:00	Submarine	Maruyu	LSC
00:18:00	Destroyer	Mutsuki-class
00:20:00		Fubuki-class , Ayanami-class , Akatsuki-class , Hatsuharu-class
00:22:00		Shiratsuyu-class , Asashio-class
	Submarine	I-168, I-8, I-58
00:24:00	Destroyer	Kagerou-class , Z1-class
00:30:00		Shimakaze
01:00:00	Light Cruiser	Tenryuu-class , Kuma-class , Nagara, Natori, Yura, Sendai-class
		Agano-class	LSC
	Heavy Cruiser	Furutaka-class , Aoba-class
01:10:00	Training Cruiser	Katori
		Kashima	LSC
	Heavy Cruiser	Zara	LSC
01:15:00	Light Cruiser	Kinu, Abukuma
01:20:00	Heavy Cruiser	Myoukou-class
01:22:00	Light Cruiser	Yuubari
01:25:00	Heavy Cruiser	Takao-class
01:30:00		Mogami, Suzuya, Kumano, Tone-class
		Mikuma	LSC
02:00:00	Light Aircraft Carrier	Houshou
02:20:00	Seaplane Tender	Chitose, Chiyoda
		Mizuho	LSC
	Fleet Oiler	Kamoi	LSC
02:30:00	Amphibious Assault Ship	Akitsu Maru	LSC
02:40:00	Light Aircraft Carrier	Shouhou-class
02:50:00		Ryuujou
03:00:00		Hiyou-class
03:20:00	Aircraft Carrying Submarine	I-401	LSC
03:40:00	Fleet Oiler	Hayasui	LSC
04:00:00	Fast Battleship	Kongou-class
04:10:00	Regular Aircraft Carrier	Souryuu, Hiryuu
		Ark Royal	LSC
04:20:00	Battleship	Fusou-class
	Regular Aircraft Carrier	Kaga
04:30:00	Battleship	Ise-class
	Regular Aircraft Carrier	Akagi
04:40:00	Battleship	Warspite	LSC
05:00:00	Battleship	Nagato-class
		Bismarck	LSC
05:30:00	Regular Aircraft Carrier	Saratoga	LSC
06:00:00	Regular Aircraft Carrier	Shoukaku-class
06:40:00	Armored Aircraft Carrier	Taihou	LSC
08:00:00	Battleship	Yamato-class	LSC

Ship Availability

• Some ships are rewarded in Quests.
• Several ships are currently dropable for a limited time, see here.
• Some ships may become buildable in future updates.

Building Recipes

Disclaimers

• These recipes are not guaranteed to give the exact ship wanted in any reasonable number of crafting attempts.
• Percentages listed are sourced from the drop databases and may not be representative of the real craft rates.
• Some ships require special Secretary to be crafted (see here).

Normal Construction Recipes

Destroyer / Light Cruiser / Heavy Cruiser / Submarine

				Notes
30	30	30	30	Mainly common destroyers and light cruisers. No rare destroyers. Small chance of Akigumo, Yayoi, & Yuubari.
250	30	200	30	Heavy cruisers, submarines, rare light Cruisers, and rare destroyers. Small chance to yield training cruiser Katori. Includes chance of rare destroyers (Shimakaze, Yukikaze) and submarines (I-168, I-58, I-8). 1.22 % Shimakaze, 1.71 % Yukikaze, 2.6 % for submarines. [4] Z3 when using Z1 as Secretary. Z1 when using Z3 as Secretary.

• Recipe percentages do not count Z1 & Z3 yet.

Battleship

				Notes
400	30	600	30	BB (32.52 %), CA (59.84 %). 2.98 % Suzuya, 2.01 % Mutsu, 1.09 % Nagato.

Standard Carrier / Light Carrier

				Notes
300	30	400	300	Most common recipe. 7.9 % chance for carriers. 32.3 % light carrier [5] Minimum amount needed to possibly create a CV/CVL according to KC Kai data.
350	30	400	350	8.5 % < 500 entries
300	30	600	400	14.3 % < 500 entries
350	30	600	350	11.9 % carrier, 32.7 % light carrier [6]

Large Ship Construction Recipes

Due to their nature and expansiveness, data on LSC recipes is relatively low and may not be fully accurate or up to date.

• Please note that all ships craftable via LSC often come back as Event rare drops.

Using any of the above mentioned Helper is either required or discouraged, depending on the targeted craft.

• When crafting a ship requiring a helper, then said helper is mandatory,
• However, when crafting any other ship, using those helpers will decrease the crafting rate of the targeted ship.

Notes

• Regarding the use of 1/20/100 DevMats:
  • The amount used affects the pool of craftable ships, with some ships only appearing with 20+ DevMats.
  • Using 100 DevMats does give better rates for some heavier ships, but the gain is often too marginal to justify this cost increase.
  • E.g.:
    • I-401 chances are improved with 1 dev mat.
    • Yamato appears with all dev mat inputs.
    • Musashi, Bismarck, and Warspite only appear with 20+ DevMat.
    • Aiming for Bismarck or Warspite before Musashi can help save both resources and DevMats as Musashi can always appear from a Bismarck attempt, but not necessarily the other way around (if a German ship is not used).

Theorical Recipes

The following are optimized recipes using data from the Kancolle Kai version [7].

The general rule for using the recipes:

• The "minimum recipes" are the minimum resources needed to obtain the desired ship.
• Increasing the resource does increase the rate and is recommended to some extent.
  • Depending on the pool, increasing some resources is more effective than others.
  • Like normal construction, resources should be increased by step. Those steps are here collapsed in the recipes table below.
  • Unless capped, it is not recommended to increase the DevMats cost.
• Unless stated otherwise having more construction docks empty increases the rate.
  • That means LSC should not be done one after another because the "in construction" docks will decrease the rate.

Maruyu
					Note
1500	1500	2000	1000	1	Recommended recipe
Notes Unlike other recipes, the number of free docks should be minimum (ideally 1).

Yamato-class (& Bismarck / Warspite)
					Note
3360	5500	6750	1950	20	Minimum recipe
[Show resource steps]
3840	5700	7000	2700	100	Increasing ammo is more effective than fuel Bauxite should not be increased above 2700, else the recipe will fall on the carrier pool.
4170	5900
4500	6100
4840	6300
5170	6500
5500	6700
5840	6900
6170
6500
6840
3360	6900	7000	1950	20	Recommended recipe
Notes This recipe should be used first if neither Yamato nor Musashi are in possession. If Musashi is constructed first, use the "Yamato only" recipe below for Yamato instead. Using the adequate secretary with those recipes can construct Bismarck or Warspite. Note that it will greatly reduced the rate of both Yamato and Musashi.

Yamato only (& Zara)
					Note
3000	4340	4670	1690	1	Minimum recipe
[Show resource steps]
3500	4670	5000	2300	X	Increasing ammo and steel is more effective than fuel Bauxite should not be increased above 2800, else the recipe will fall on the carrier pool. DevMats should not be increased, else the recipe will fall on the heavy pool.
4000	5000	5000	2800
4500	5340	5340
5000	5670	5670
5500	6000	6000
6000	6340	6340
6500	6670	6670
7000	7000	7000
3000	6000	6000	1690	1	Recommended recipe
Notes The above Yamasushi recipe should be used first if neither Yamato nor Musashi are in possession. Using the adequate secretary with those recipes can construct Zara. Note that it will greatly reduced the rate of Yamato.

Taihou (& Saratoga / Ark Royal)
					Note
3670	1950	4250	5200	1	Minimum recipe
[Show resource steps]
4000	2340	4500	5400	X	Increasing steel and bauxite is more effective than fuel and ammo.
4340	2670	4750	5600
4670	3000	5000	5800
5000	3340	5250	6000
5340	3670	5500	6200
5670	4000	5750	6400
6000	4340	6000	6600
6340	4670	6250	6800
6670	5000	6500	7000
7000	5340	6750
	5670	7000
	6000
	6340
	6670
	7000
4000	1950	5000	6000	1	Recommended recipe
Notes Using the adequate secretary with those recipes can construct Saratoga or Ark Royal. Note that it will greatly reduced the rate of Taihou.

I-401
					Note
2880	4160	4560	1690	1	Recommended recipe (& minimum)
Notes Unlike other rare ships, I-401 is not at the beginning of the pool (as Yamato is). So the best recipe is the minimum one.

Kamoi & Akitsu Maru
					Note
3670	1950	4250	5200	1	Recommended recipe (& minimum)
Notes Unlike other rare ships, Kamoi and Akitsu Maru are not at the beginning of the pool (as Taihou is). So the best recipe is the minimum one. For Kamoi, the number of free docks should be a minimum (ideally 1). For Akitsu Maru, the number of free docks should be maximum. Akitsu Maru is available in other pools but her rate is the highest in the carrier pool.

Old Empirical Recipes

This section is empirical, being outdated by nature. Some recipes and percentages are missing and outdated. Potential misinformation. Those recipes are still viable but may not be optimal.

					Focused Ship	Crafting rate	Sample size	Helper?	Notes
Any	Any	Any	Any	Any	Maruyu	14.9 % with 1.5/1.5/2/1 6.2 % with 4/6/6/2	-	❌	Using fewer resources increases the rate
1500	1500	2000	1000	1	Nagato-class Mogami-class Agano-class	3.2 % Nagato; 6.2 % Mutsu 2.1 % Mikuma; 3.0 % Suzuya; 3.2 % Kumano 3.2 % Agano; 2.1 % Noshiro; 1.7 % Yahagi	25 000	❌
4000	2000	5000	7000	20	Taihou	5.5 %	7 062	❌
4000	2000	5000	6000	20	Taihou	5.7 %	4 721	❌
4000	2000	5000	5200	20	Taihou	5.0 %	15 165	❌
3600	2000	5300	5200	20	Taihou	4.6 %	717	❌	Lacking data
3600	2000	5300	5200	1	Akitsu Maru	7.0 %	717	❌	Lacking data
4000	2000	5000	5500	20	Taihou Akitsu Maru	6.0 % Taihou 8.6 % Akitsu Maru	909	❌	Lacking data
4000	6000	6000	3000	20	Yamato-class Yamato focus	2.7 % Yamato 2.9 % Musashi	23 902	❌
					Bismarck	2.4 %	4 064	✔️	Yamato-class possible
4000	7000	7000	2000	20	Yamato-class Musashi focus	2.7 % Yamato 5.8 % Musashi	10 117	❌
					Bismarck	1.1 %	4 628	✔️	Yamato-class possible
4000	7000	7000	2000	1	I-401 Yamato	4.1 % I-401 3.2 % Yamato	4 547	❌
6000	7000	7000	2000	20	Yamato-class Musashi focus	2.7 % Yamato 7.2 % Musashi	9 975	❌
4000	6000	7000	2000	20	Yamato-class Bismarck focus	1.9 % Yamato 3.5 % Musashi	17 498	❌	Should uses Bismarck's helpers
						6.9% Bismarck	11 683	✔️
4000	6000	6000	2000	20	Yamato-class	2.4 % Yamato 2.6 % Musashi 1.3 % I-401	57 104	❌	Most Reported
					Bismarck	2.5 %	19 000	✔️
4000	6000	6000	2000	1	I-401 Yamato	4.3 % I-401 2.5 % Yamato	30 200	❌
4000	5900	6000	2000	1	I-401	4.3 %	1 324	❌	Lacking data
4000	7000	7000	3000	1	I-401	6.9 %	306	❌	Lacking data
3000	4500	4500	2000	20	Zara	3.3 %	3627	✔️
3500	3500	6000	6000	20	Kamoi	1.5 %	4796	❌
4000	2000	5000	6000 7000	20	Kamoi Saratoga	2.8 % Kamoi 2.0 % Saratoga	19 350	✔️
7000	7000	7000	3000	20	Warspite	1.9%	161	✔️	Lacking data
4000	2000	5000	5200	20	Ark Royal	? %	N/A	✔️	Lacking data
??	??	??	??	??	Kashima	? %	N/A	❌	Lacking data
??	??	??	??	??	Hayasui	? %	N/A	❌	Lacking data

Sources

• Based on Poi-Statistics.
• Kancolle DB reports include all development materials and Secretary used. This is especially noticeable for BB recipes where the number of attempts with/without Z1/Z3 skew the results towards either Bismarck or Yamato-class significantly. However, since the data sets are still significantly less biased than wikiwiki reports, it gives a better idea of what to expect.

See Also

• Poi-Statistics Database
• Japanese Wiki - LSC Page
• Chinese Wiki - Construction Page