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:

• LB Land-Based Recons
  .
  • Air power and LoS might be affected, but it is unknown due to how LBAS work.
• Submarine Equipment.
• Command Facilities
  
  .
• Rations
  
  .
  • Morale gains might be affected. So far, improvement serves to upgrade them into their improved versions.
  • 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 F18.

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		CI rates
			Firepower	Torpedo			Ship	Fleet			Shelling	Torpedo	Shelling	Torpedo	Fleet	Enemy
Main Guns	(Very) Large		1.5	-	1	-	-	-	-	-	1	-	-	-	-	-
	Medium (Red)		1	-	1	-	-	-	-	-	1	-	-	-	-	-
	Small (Red)		1	-	1	-	-	-	-	-	1	-	-	-	-	-
	HA (Green) Main		1	-	1	-	2 3	2 3	-	-	1	-	-	-	-	-
Secondary Guns	90 mm Single HA Sec		1	-	1	-			-	-	1	-	-	-	-	-
	HA (Green) Sec		Linear 0.2 Linear 0.3	-	Linear 0.2 Linear 0.3	-			-	-	1	-	-	-	-	-
	Surface (Yellow)			-		-	-	-	-	-	1	-	-	-	-	-
	15.2 cm Single & OTO		1	-	1	-	-	-	-	-	1	-	-	-	-	-
Anti-Aircraft Fire Directors			1	-	1	-	2 3	2 3	-	-	1	-	-	-	-	-
Anti-Air Guns			1	1.2	-	-	4 6	-	-	-	-	2	-	-	-	-
Torpedoes			-	1.2	1	-	-	-	-	-	-	2	-	-	-	-
Midget Submarines Minisub			-	-	1	-	-	-	-	-	-	-	-	-	-	-
(Large) Carrier Recons			-	-	-	-	-	-	-	1.2	-	-	-	-	-	-
Large Flying Boats			-	-	-	-	-	-	-	1.2	-	-	-	-	-	-
Seaplanes	Recons		-	-	-	-	-	-	-	1.2	-	-	-	-	-	-
	Bombers		-	-	-	-	-	-	-	1.1	-	-	-	-	-	-
Liaison Aircraft			-	-	-	-	-	-	-	-	1	-	-	-	-	-
Land Based Bombers	Attackers/Assault/Heavy Bombers		-	0.7	-	-	-	-	0.5	-	-	-	-	-	-	-
	Ginga & Type 1 Nonaka		-	0.7	-	-	-	-	Linear 0.25	-	-	-	-	-	-	-
	Hayabusa bomber		-	-	-	-	-	-	0.5	-	-	-	-	-	-	-
Radars	Surface	Large	-	-	-	-	-	-	-	1.4	1.7	-	-	-	-	-
		Small	-	-	-	-	-	-	-	1.25		-	-	-	-	-
	Dual Purpose	(Very) Large	-	-	-	-	-	1.5	-	1.4		-	-	-	-	-
		Small	-	-	-	-	-		-	1.25	1	-	-	-	-	-
	Air Radar	Large	-	-	-	-	-		-	1.4		-	-	-	-	-
		Small	-	-	-	-	-		-	1.25		-	-	-	-	-
Depth Charges			0.75	-	-	0.67	-	-	-	-	-	-	-	-	-	-
Sonars			0.75	-	-	0.67	-	-	-	-	1.3	-	-	1.5	-	-
Engines			-	-	-	-	-	-	-	-	-	-	1.5		-	-
Shells			1	-	1	-	-	-	-	-	1	-	-	-	-	-
Landing Craft & Amphibious Tank			1	-	1	-	-	-	-	-	-	-	-	-	-	-
Anti-Ground Rockets			1	-	1	-	-	-	-	-	-	-	-	-	-	-
Lookouts			1	-	1	-	-	-	-	-	-	-	-	-	-	-
Searchlights			1	-	1	-	-	-	-	-	-	-	-	-	-	-?%
Aviation Personnels			1	-	1	-	-	-	-	-	-	-	-	-	-	-

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	Anti-Installation Bonus	Expedition Bonus
Submarine Torpedoes Sub		-	-	0.2	-	-	-	-
Fighters		0.2	-	-	-	-	-	-
SPF		0.2	-	-	-	-	-	-
LB Fighters		0.2	-	-	-	-	-	-
Fighter-Bombers		0.25	-	-	-	-	-	-
Mod 64 Zero FB		0.25	-	-	0.2	-	-	-
Dive Bombers (ex. FB)		-	0.2	-	0.2	-	-	-
Torpedo Bombers		-	-	0.2	0.2	-	-	-
Seaplane Bombers		-	0.2	-	-	-	-	-
Rotorcraft	Basic	-	-	-	0.2	-	-	-
	Advanced	-	-	-	0.3	-	-	-
Liaison Aircraft	Basic	-	-	-	0.2	-	-	-
	Advanced	-	-	-	0.3	-	-	-
Extra Armor	Medium	-	-	-	-	0.2	-	-
	Large	-	-	-	-	0.3	-	-
Landing Craft		-	-	-	-	-	0.02%	0.05% 0.02% 0%
Amphibious Tanks		-	-	-	-	-	0.03%	0.01%

See Also

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