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.

• 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.
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, F22, 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]

• [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/Heavy Bombers	-	0.7*both and [5]	-	-	-	-	0.5	-	-	-	-	-	-	-
	Hayabusa bomber bomber	-	0.7*only against DD and Installation [6]	-	-	-	-		-	-	-	-	-	-	-
Radars		-	-	-	-	-	0 1.5	-	1.25 1.4	1 1.7	1.3 1.6	-	-	-	-
Depth Charges		0.75	-	-	0.67	-	-	-	-	-	-	-	-	-	-
Depth Charge Racks DCR		-	-	-		-	-	-	-	-	-	-	-	-	-
Sonars		0.75	-	-	0.67	-	-	-	-	-	-	-	1.3	-	1.5
Engine Improvements		-	-	-	-	-	-	-	-	-	-	-	-	1.5
Shells/Searchlights/Lookouts Landing Equipment/Anti-Ground Rockets		1	-	1	-	-	-	-	-	1	1.3	-	-	-	-
Aviation Personnels/Anti-Ground Rockets Command Facilities/Smoke Generators		1	-	1	-	-	-	-	-	1?	1.3?	-	-	-	-
Submarine Equipments		-	-	-	-	-	-	-	-	-	-	-	-	-	-
Combat Rations		-	-	-	-	-	-	-	-	-	-	-	-	-	-

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

Linear % Bonus

Equipment Type	Anti-Installation Bonus	Expedition Bonus
Landing Craft	0.02%	0.05% 0.02% 0%
Amphibious Tanks	0.03%	0.01%

Expeditions Bonus

In expeditions, improvements are globally simplified.

• See here for more details

Resource Node Bonus

Uniquely on the Resource Nodes 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: [7] [8] [9] [10] [11]

See Also

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