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Improvement

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Introduction

Improvements are upgrades to equipment that increase their performance or upgrade them to better versions. Akashi is required to improve equipment. Improvements are done in Akashi's Improvement Arsenal. Improvement Materials Improvement material are needed for all improvements except Battle Ration 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 Icon Star.png+1 to Icon Imp.png (+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.
    • 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 Icon Star.png+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 Icon Star.png to the upgraded equipment.
  8. Certain conversion quests like F62, F89, F70, and F107, allow to use Improved equipment, but any Icon Star.png 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.

The Torpedo-based WeaponMinisub Midget SubmarinesType A Kouhyouteki
Type C Kouhyouteki
Type D Kouhyouteki Kai (Kouryuu Kai)
and Combat Ration RationsCombat Ration
Combat Ration (Special Onigiri)
Canned Saury
are the only equipment that do not gain any stats from improvement.

  • Improving them only serves to upgrade them into their improved versions.
  • Since improving a Combat RationCombat 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

Bonuses to attack power (day shelling, night shelling, torpedo, ASW), anti-air, LoS, accuracy and evasion 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 modifer for that stat. Please refer to the table below for details.
Equipment Type Day Battle Night Battle ASW AA LoS Accuracy Evasion
Firepower Torpedo Equipment AA Fleet AA Shelling Torpedo Shelling Torpedo
Main Guns Small Guns (Red)
Small Caliber Main Gun
1 - 1 - - - - 1 - - -
Main High-Angle Guns (Green)
Dual-purpose Gun
1 - 1 - 0.7 3 - 1 - - -
Medium Guns (Red)
Medium Caliber Main Gun
1 - 1 - - - - 1 - - -
Large Guns
Large Caliber Main Gun
1.5 - 1 - - - - 1 - - -
Secondary Guns Surface (Yellow)
Auxiliary Gun
1 - 1 - - - - 1 - - -
High-Angle (Green)
Dual-purpose Gun
Linear 0.2 - Linear 0.2 - 0.7 3 - 1 - - -
Anti-Air Guns
Anti-aircraft Point-defense Weapon
1 1.2 - - 0.7 - - - 2 - -
Anti-Aircraft Fire Directors
Anti Aircraft Fire Director
1 - 1 - 0.7 2 - 1 - - -
Torpedoess
Torpedo-based Weapon
0 1.2 1 - - - - - 2 - -
Carrier Recons
Reconnaissance Aircraft
- - - - - - 1.2 - - - -
Seaplanes (Reconnaissance & Bomber)
Seaplane
- - - - - - 1.2 - - - -
Radars
RADAR
Surface Radars - - - - - - 1.25 1.7 - - -
Air Radars - - - - - 1.5 1.25 1 - - -
Depth Charges
Depth Charges
0.75 - - 0.66 - - - - - - -
Sonars
SONAR
0.75 - - 0.66 - - - 1.3[1] - - 1.5
Engines
Propulsion Systems
- - - - - - - - - - 1.5
Shells
Armor Piercing AmmunitionSanshiki "Beehive" Ammunition
1 - 1 - - - - - 1 - -
Landing Crafts & Amphibious Tank
Landing CraftAmphibious Tank
1 - 1 - - - - - - - -
Searchlights
Searchlight
1 - 1 - - - - - - - -
Anti-Ground Artillery
Anti-Ground Artillery
1 - 1 - - - - - - - -
  1. Applies to ASW only.

Linear Bonus

Bonuses to fighter power, dive bomb, plane torpedo, plane ASW, armour, anti-installation bonus and expedition bonus just have a linear growth. The bonus per improvement level is given by the table below.

Equipment Type Fighter Power Dive Bomb Torpedo ASW Armour Anti-Installation Bonus[1] Expedition Bonus[2]
Carrier-based Planes Fighters
Fighter
0.2 - - - - - -
Fighter-Bombers
Dive Bomber
0.25 - - - - - -
Dive Bombers (ex. FB)
Dive Bomber
- 0.2 - 0.2 - - -
Torpedo Bombers
Torpedo Bomber
- - 0.2 0.2 - - -
Interceptors
Interceptor FighterLand-based Fighter
0.2 - - - - - -
Armor
Add-on Armor
Medium - - - - 0.2 - -
Large - - - - 0.3 - -
Seaplane Bombers
Seaplane
- 0.2 - - - - -
Rotorcrafts
Autogyro
Basic[3] - - - 0.2 - - -
Advanced[4] - - - 0.3 - - -
Landing Crafts
Landing Craft
- - - - - 0.02% 0.05%[5]


0.02%[6]

Amphibious Tanks
Amphibious Tank
- - - - - 0.03% 0.01%

See Also

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