Improvement

Improvements are upgrades to equipment that increase their performance or upgrade them to better versions. Improvements are done in Akashi's Improvement Arsenal, requiring Akashi. Improvement Materials are notably used for improvements.

• See the full list of improvable equipment here (this omit the equipment not improvable but obtainable already improved) .
• See the full list of ship Helpers here.
• For a comprehensive list of improvements, please refer to Akashi-List or the List of Improvements.

Overview

1. Improvement levels are displayed beside equipment names.
   • They run from +1 to (+10).
2. Improvement bonuses are hidden. The increase in stats is not reflected on ship girls' stat cards.
   • This means they do not count for Support Expeditions or for reaching certain thresholds like for OASW.
   • Those bonuses work to some extent to reach regular Expeditions thresholds.
   • Some improvements on equipment can add some additional visible Fit Bonuses.
     • This works an equipment-to-equipment and ship-to-ship basis with no general rule.
3. Equipped equipment cannot be improved.
   • There is an option to unequip the equipment from the improvement list.
4. Equipment must be unlocked in order to be upgraded to a better version.
5. Improvements have a chance to fail. Please see below.
   • Materials () and any fodder equipment are still lost on failure.
     • Items are not lost.
   • The equipment being improved is never lost.
   • It is recommended to use the guaranteed improvement toggle when dealing with expensive improvements and/or rare fodder at +6 and beyond.
   • Akashi Kai has a higher success rate than her base version.
6. Improved equipment cannot be used as fodder.
7. Certain conversion quests like F13, F14, F15, F19, Fm1, and F24 to F30, that do not require improved equipment, will carry over any to the upgraded equipment.
   • This is currently the only way to obtain improved versions of the Tenzan Model 12 (Tomonaga Squadron), Suisei (Egusa Squadron) & Reppuu (601 Air Group) (unimprovable otherwise).
8. Certain conversion quests like F62, F89, F70, and F107, allow to use improved equipment, but any are lost during conversion.

Improvement Success Rates

Akashi's level does not affect improvement rates. However, her remodel status does. It is highly recommended that she be remodeled to Kai as soon as possible, to maximize improvement success rates. The data below is sourced from KanColle Kai.

Modification Level	1★	2★	3★	4★	5★	6★	7★	8★	9★	Max★	Upgrade
Akashi	100%	100%	100%	100%	95%	90%	80%	77%	72%	60%	50%
Akashi Kai	100%	100%	100%	100%	100%	95%	90%	82%	77%	67%	62%

Improvement Bonuses

The bonus stats gained from improvement will vary depending on the type of equipment as well as the stat itself.

• Most improved stats will come as decimal numbers due to the use as base decimals and how square roots work.
• It is important to note that decimals must not be discarded in favor of whole numbers, as stats will be multiplied by various formulas anyway, to finally be rounded down/up.
• For calculated improvment bonuses, please refer to the Categories Charts or Reference Charts.

The improvement effects are unknown for some equipment types/cases.

Square Rooted Bonus

Most bonuses are all a function of the square root of the improvement level. The bonus can be calculated by:

[math]\displaystyle{ \text{Bonus}_\text{stat} = \sum_{\text{All equips}} \text{Mod}_\text{equip} \sqrt{\bigstar} }[/math]

With

• [math]\displaystyle{ \bigstar }[/math] is the improvement level of the equipment.
• [math]\displaystyle{ \text{Mod}_\text{equip} }[/math] is the equipment modifier for that stat. Please refer to the table below for details.

Equipment Type		Day Battle		Night Battle	ASW	AA		Fighter Power	LoS	Accuracy				Evasion
		Firepower	Torpedo			Ship	Fleet			Day	Night	Torpedo	ASW	Shelling	Torpedo
Main Guns	(Very) Large Sp	1.5	-	1	-	-	-	-	-	1	1.3	-	-	-	-
	Medium/Small (Red)	1	-	1	-	-	-	-	-	1	1.3	-	-	-	-
	HA (Green) Main	1	-	1	-	2 3	2 3	-	-	1	1.3	-	-	-	-
Secondary Guns	90 mm Single HA Sec	1	-	1	-			-	-	1	1.3	-	-	-	-
	HA (Green) Sec	Linear 0.2 Linear 0.3	-	Linear 0.2 Linear 0.3	-			-	-	1	1.3	-	-	-	-
	Surface (Yellow)		-		-	-	-	-	-	1	1.3	-	-	-	-
	15.2 cm Single & OTO	1	-	1	-	-	-	-	-	1	1.3	-	-	-	-
Anti-Aircraft Fire Directors		1	-	1	-	2 3	2 3	-	-	1	1.3	-	-	-	-
Anti-Air Guns		1	1.2	-	-	4 6	-	-	-	-	-	2	-	-	-
Torpedoes		-	1.2	1	-	-	-	-	-	-	1.3	2	-	-	-
Midget Submarines Minisub		-	-	1	-	-	-	-	-	-	1.3	-	-	-	-
(Large) Carrier Recons/Large Flying Boats Sp		-	-	-	-	-	-	-	1.2	-	-	-	-	-	-
LB Recons LB		-	-	-	-	-	-	-	1.2?	-	-	-	-	-	-
Seaplanes	Recons	-	-	-	-	-	-	-	1.2	-	-	-	-	-	-
	Bombers	-	-	-	-	-	-	-	1.1	-	-	-	-	-	-
Rotorcraft/Liaison Aircraft		-	-	-	Linear	-	-	-	-	1?	1.3?	-	-	-	-
Land Based Bombers	Attackers/Assault/ASW/Heavy Bombers	-	0.7*both and [4]	-	-	-	-	0.5	-	-	-	-	-	-	-
	Hayabusa bomber bomber	-	0.7*only against DD and Installation [5]	-	-	-	-		-	-	-	-	-	-	-
Radars		-	-	-	-	-	0 1.5	-	1.25 1.4	1 1.7	1.3 1.6	-	-	-	-
Depth Charges		0.75	-	-	0.67	-	-	-	-	-	-	-	-	-	-
T95 DC & T2 DC/K2		-	-	-		-	-	-	-	-	-	-	-	-	-
Sonars		0.75	-	-	0.67	-	-	-	-	-	-	-	1.3	-	1.5
Engine Improvements		-	-	-	-	-	-	-	-	-	-	-	-	1.5
Shells/Searchlights/Lookouts/Landing Equipment Anti-Ground Rockets/Command Facilities		1	-	1	-	-	-	-	-	1	1.3	-	-	-	-
Aviation Personnels/Anti-Ground Rockets Smoke Generators		1	-	1	-	-	-	-	-	1?	1.3?	-	-	-	-

Linear Bonus

Some bonuses have a linear growth. The bonus per improvement level is given in the table below.

Equipment Type		Fighter Power	Dive Bomb	Torpedo	ASW	Armor
Submarine Torpedoes Sub		-	-	0.2	-	-
Fighters		0.2	-	-	-	-
Seaplane Fighters			-	-	-	-
LB Fighters			-	-	-	-
Fighter-Bombers		0.25	-	-	-	-
Mod 64 Zero FB			-	-	0.2	-
Dive Bombers (ex. FB)		-	0.2	-		-
Torpedo Bombers		-	-	0.2		-
Seaplane Bombers		-	0.2	-	-	-
Rotorcraft		-	-	-	0.2 0.3	-
Liaison Aircraft		-	-	-	0.2 0.3	-
Extra Armor	Medium	-	-	-	-	0.2
	Large	-	-	-	-	0.3

Averaged Bonus

The average is counted using all craft on the ship for anti-installation, and all "working" craft in the fleet for expeditions.

All the following bonuses are part of bigger formulas:

• See Anti-Installation for more details,
• See Expedition for more details.

Equipment Type	Anti-Installation Bonuses		Expedition Bonus
	A1	C
Landing Craft	1 + (Average /50)	[1 + (Average /50)]N	1 + (Average /100)
Amphibious Tanks	1 + (Average /30)	1 + (Average /30)

Misc Bonuses

Other bonuses observed in the game.

• See Smoke Generators for more details,

Equipment Type	Smoke Trigger Rate
Smoke Generators	Increased

It is confirmed that none of the usual stats, probably nothing at all, is given to the following equipment types.

Equipment Type	Effect
Submarine Equipments	"Nothing"
Combat Rations	"Nothing"

• So far, Onigiri improvement only serves to upgrade into Special Onigiri.
  • Since improving a Combat Ration up to +6★ cost 0 screw, it is possible to farm some screw by upgrading a ration once a day while doing quest Fd6.

Resource Node Bonus

Uniquely on the Resource Nodes of 1-6 and 3-5, improvements slightly increase resource gains.

Special Resource Nodes Gain Modifiers Type 2
Equipment / Ship				Bonus Gains (per DLC / Ship)
Type			Name	1-6					3-5
				N	G	G	M	M	J	J
	A	1	Toku Daihatsu Landing Craft	0.0	6.00	0.3800?	12.00	0.??	24.00	0.??
		2	Ka-Tsu Tank Kai		5.50	0.??	11.00	0.??	22.00	0.2??
		3	Daihatsu Landing Craft		5.00	0.0350?	10.00	0.??	20.00	0.??
		4	Ka-Tsu Tank		4.50	0.??	9.00	0.??	18.00	0.2??
		5	Armed Daihatsu		2,50	0.0720?	5.00	0.??	10.00	0.??
		6	DLC + T89 Tank DLC + Panzer II		1.50	0.0100?	3.00	0.??	6.00	0.??
		7	Soukoutei Toku DLC + Ho-Ni Tank		1.10	0.0200?	2.20	0.??	4.40	0.??
		8	Ka-Mi Tank		0.75	0.0041?	1.50	0.??	3.00	0.??
	B		Drums		0.0	N/A	0.0	N/A	10.0	N/A
	C		Toku DLC + 11th Reg M4A1 DD Toku DLC + Panzer III Toku DLC + Chi-Ha Toku DLC + Chi-Ha Kai Toku DLC + Panzer III J		0.0
Ship			Kinu Kai Ni		5.0	N/A	10.0	N/A	20.00	N/A
			Other Ships		0.0		0.0		0.0
Resource Cap				N/A	40		80		150
Random Resource Increments				N/A	0		0		0
Star Bonus [math]\displaystyle{ \text{Bonus}_\text{Star} = \sum_\text{All Types} \text{N}_\text{Type}^2 \times \sqrt{\text{N}_\text{Star Type} } \times \text{Star Bonus}_\text{Type} }[/math] With [math]\displaystyle{ \text{Bonus}_\text{Star} }[/math] the total bonus resource gain bonus for the fleet, [math]\displaystyle{ \text{N}_\text{Type} }[/math] the number of craft of a given type (A1 to A6), [math]\displaystyle{ \text{N}_\text{Star Type} }[/math] the total number of stars on a given type, [math]\displaystyle{ \text{Star Bonus}_\text{Type} }[/math] the bonus given by stars of each type. Notes: Sources: [6] [7] [8] [9] [10]

Myths

The following have been confirmed to be negative.

• on Searchlights do NOT increase:
  • Night Cut-In rate of neither fleets,
  • Targeting rate.
• on Lookouts do NOT increase Night Cut-In rate,
• on Submarine Equipments do NOT increase Night Cut-In rate.

Expeditions Bonus

For expedition stats requirements, improvements are globally simplified, overwriting the above-mentioned improvements.

• See here for more details

See Also

• Akashi's Improvement Arsenal
• Improvement/Categories
• Improvement/Helper
• Improvement/Reference Charts
• Help:Akashi Upgrades
• https://akashi-list.me/