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Improvement

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Development · Improvement · Fit Bonuses
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Stats · Resources · Experience and Rank · Ranking


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 Improvement material 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 Improved+1 to Max-Improved (+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 on 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 (Development materialImprovement material) 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 Improved+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 Improved to the upgraded equipment.
  8. Certain conversion quests like F62, F89, F70, and F107, allow to use improved equipment, but any Improved 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[1] Evasion
Firepower Torpedo Ship Fleet Day Night Torpedo ASW Shelling Torpedo
Main Guns (Very) Large
Large Caliber Main GunVery Large Caliber Main GunSp
1.5 - 1 - - - - - 1 1.3 - - - -
Medium/Small (Red)
Medium Caliber Main GunSmall Caliber Main Gun
1 - 1 - - - - - 1 1.3 - - - -
HA (Green)
Main High-Angle GunMain
1 - 1 - 2[2]
3[3]
2[2]
3[3]
- - 1 1.3 - - - -
Secondary Guns 90 mm Single HA90mm Single High-angle Gun Mount
Secondary High-Angle GunSec
1 - 1 - - - 1 1.3 - - - -
(Large) HA (Green)
Secondary High-Angle GunSec Large Secondary High-Angle GunSp_Sec
Linear 0.2[4]
Linear 0.3[5]
- Linear 0.2[4]
Linear 0.3[5]
- - - 1 1.3 - - - -
Surface (Yellow)
Secondary Gun
- - - - - - 1 1.3 - - - -
15.2 cm Single15.2cm Single Gun Mount & OTOOTO 152mm Triple Rapid Fire Gun Mount
Secondary Gun
1 - 1 - - - - - 1 1.3 - - - -
Anti-Aircraft Fire Directors
Anti-Aircraft Fire Director
1 - 1 - 2[2]
3[3]
2[2]
3[3]
- - 1 1.3 - - - -
Anti-Air Guns
Anti-Aircraft Gun
1 1.2 - - 4[2]
6[3]
- - - - - 2 - - -
Torpedoes
Torpedoes
- 1.2 1 - - - - - - 1.3 2 - - -
Midget Submarines
Midget SubmarineMinisub
- - 1 - - - - - - 1.3 - - - -
(Large) Carrier Recons/Large Flying Boats
Reconnaissance AircraftLarge Reconnaissance AircraftSpLarge Flying Boat
- - - - - - - 1.2 - - - - - -
LB Recons
Land-based Reconnaissance AircraftLB
- - - - - - - 1.2?[6] - - - - - -
Seaplanes
SeaplaneNight Reconnaissance Seaplane
Recons - - - - - - - 1.2 - - - - - -
Bombers - - - - - - - 1.1 - - - - - -
Rotorcraft/Liaison Aircraft
RotorcraftLiaison Aircraft
- - - Linear - - - - 1?[7] 1.3?[7] - - - -
Land Based Bombers Attackers/Assault/ASW/Heavy Bombers
Land-based Attack AircraftLand-based Assault AircraftLand-based Patrol AircraftLand-based Heavy Bomber
- 0.7*both Torpedo Attack and Dive Bomber Attack[5] - - - - 0.5 - - - - - - -
Hayabusa bomberBomb-carrying Type 1 Fighter Hayabusa Model III Kai (65th Squadron)
Land-based Fighterbomber
- 0.7*only against DD and Installation [6] - - - - - - - - - - -
Radars
RADAR
- - - - - 0[8]
1.5[9]
- 1.25[10]
1.4[11]
1[12]
1.7[13]
1.3[14]
1.6[15]
- - - -
Depth Charges
Depth Charges
0.75 - - 0.67 - - - - - - - - - -
T95 DCType 95 Depth Charge & T2/K2 DCType 2 Depth Charge
Type 2 Depth Charge Kai 2

Depth Charges
- - - - - - - - - - - - -
Sonars
SONAR
0.75 - - 0.67 - - - - - - - 1.3 - 1.5
Engine Improvements
Engine Improvement
- - - - - - - - - - - - 1.5
Shells/Searchlights/Lookouts
Landing Equipment/Command Facilities
Anti-Aircraft ShellArmor-Piercing ShellSearchlightLookoutLanding CraftAmphibious VehicleLanding ForcesCommand Facility
1 - 1 - - - - - 1 1.3 - - - -
Aviation Personnels/Anti-Ground Rockets
Smoke Generators
Aviation PersonnelAnti-Ground RocketSmoke Generator
1 - 1 - - - - - 1?[7] 1.3?[7] - - - -
  1. [1]
  2. 2.0 2.1 2.2 2.3 2.4 For base Anti-Air AA ≤ 7
  3. 3.0 3.1 3.2 3.3 3.4 For base Anti-Air AA ≥ 8
  4. 4.0 4.1 For base Firepower FP ≤ 3
  5. 5.0 5.1 For base Firepower FP ≥ 5
  6. LoS might be affected like other recons, but it is not measurable, due to how LBAS work.
  7. 7.0 7.1 7.2 7.3 Unconfirmed yet
  8. For Surface Radars
  9. For Air Radars
  10. For Small Radars
  11. For (Very) Large Radars
  12. For pure Surface Radars & Large Dual Purpose Radars
  13. For pure Air Radars & Small Dual Purpose Radars
  14. For base Accuracy Acc ≤ 2
  15. For base Accuracy Acc ≥ 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
Submarine TorpedoesSub
- - 0.2 - -
Fighters
Fighter
0.2 - - - -
Seaplane Fighters
Seaplane Fighter
- - - -
LB Fighters
Land-based FighterLand-based Fighter
- - - -
Fighter-Bombers
Dive Bomber
0.25 - - - -
Mod 64 Zero FBType 0 Fighter Model 64 (Two-seat w/ KMX)
Type 0 Fighter Model 64 (Skilled Fighter-bomber)

Dive Bomber
- - 0.2 -
Dive Bombers (ex. FB)
Dive Bomber
- 0.2 - -
Torpedo Bombers
Torpedo Bomber
- - 0.2 -
Seaplane Bombers
Seaplane
- 0.2 - - -
Rotorcraft
Rotorcraft
- - - 0.2[1]
0.3[2]
-
Liaison Aircraft
Liaison Aircraft[3]
- - - 0.2[4]
0.3[5]
-
Extra Armor
Armor
Medium - - - - 0.2
Large - - - - 0.3
  1. For base Anti-Submarine Warfare ASW ≤ 10
  2. For base Anti-Submarine Warfare ASW ≥ 11
  3. [2][3]
  4. For base Anti-Submarine Warfare ASW ≤ 7
  5. For base Anti-Submarine Warfare ASW ≥ 8

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:

Equipment Type Anti-Installation Bonuses[1][2] Expedition Bonus
A1 C
Landing Craft
Landing Craft
1 + (Average Improved /50) [1 + (Average Improved /50)]N[3] 1 + (Average Improved /100)[4]
Amphibious Vehicles
Amphibious Vehicle
Ka-Mi tankSpecial Type 2 Amphibious Tank 1 + (Average Improved /30) 1 + (Average Improved /30)
Ka-Tsu tanksSpecial Type 4 Amphibious Tank
Special Type 4 Amphibious Tank Kai
1 + (Average Improved /50) [1 + (Average Improved /50)]N[3]
Landing Forces
Landing Forces
Unknown yet -
  1. The average stars are counted on a per-category basis, with each 3 categories being counted separately.
  2. https://bbs.nga.cn/read.php?tid=39595977&rand=587
  3. 3.0 3.1 N = 1 for any Landing Craft/Ka-Tsu, +1 to N for each unique:
  4. Does not work for Type 3 Landing Tanks

Misc Bonuses

Other bonuses observed in the game.

Equipment Type Smoke Trigger Rate Smoke Level
Smoke Generators
Smoke Generator
Increased[1] Increased[2]

It is confirmed that none of the usual stats, probably nothing at all, is given to the following equipment types[3].

Equipment Type Effect
Submarine Equipments
Submarine Equipment
"Nothing"
Combat Rations
Ration
"Nothing"[4]
  • So far, Ration OnigiriCombat Ration improvement only serves to upgrade into Special OnigiriCombat Ration (Special Onigiri).
    • 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 Fd6.

Resource Node Bonus

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

Special Resource Nodes Gain Modifiers
Type 2
Equipment / Ship Bonus Gains (per DLC / Ship)[1]
Type Name 1-6 3-5
N G
Ammunition
G
Improved[2]
M
Fuel
M
Improved[2]
J
Ammunition
J
Improved[2]
Landing Craft
Amphibious Vehicle
A 1 Toku Daihatsu Landing CraftToku Daihatsu Landing Craft 0.0 6.00 0.3800? 12.00 0.?? 24.00 0.??
2 Ka-Tsu Tank KaiSpecial Type 4 Amphibious Tank Kai 5.50 0.?? 11.00 0.?? 22.00 0.2??
3 Daihatsu Landing CraftDaihatsu Landing Craft 5.00 0.0350? 10.00 0.?? 20.00 0.??
4 Ka-Tsu TankSpecial Type 4 Amphibious Tank 4.50 0.?? 9.00 0.?? 18.00 0.2??
5 Armed DaihatsuArmed Daihatsu 2,50 0.0720? 5.00 0.?? 10.00 0.??
6 DLC + T89 TankDaihatsu Landing Craft (Type 89 Medium Tank & Landing Force)
DLC + Panzer IIDaihatsu Landing Craft (Panzer II/North African Specification)
1.50 0.0100? 3.00 0.?? 6.00 0.??
7 SoukouteiSoukoutei (Armored Boat Class)
Toku DLC + Ho-Ni TankToku Daihatsu Landing Craft + Type 1 Gun Tank
1.10 0.0200? 2.20 0.?? 4.40 0.??
8 Ka-Mi TankSpecial Type 2 Amphibious Tank 0.75 0.0041? 1.50 0.?? 3.00 0.??
Drum Canister B DrumsDrum Canister (Transport Use) 0.0 N/A 0.0 N/A 10.0 N/A
Landing Craft C Toku DLC + 11th RegToku Daihatsu Landing Craft + 11th Tank Regiment
M4A1 DDM4A1 DD
Toku DLC + Panzer IIIToku Daihatsu Landing Craft + Panzer III (North African Specification)
Toku DLC + Chi-HaToku Daihatsu Landing Craft + Chi-Ha
Toku DLC + Chi-Ha KaiToku Daihatsu Landing Craft + Chi-Ha Kai
Toku DLC + Panzer III JToku Daihatsu Landing Craft + Panzer III Ausf. J
0.0
Ship Kinu Kai NiKinu Kai Ni[3] 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[2]
[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:

  1. If the total value has a decimal, only the rounded-down value is applied.
  2. 2.0 2.1 2.2 2.3 Exact values an behaviors still under investigation
  3. Those bonuses only appear if any type from A1 to A8 is equipped in the fleet.

Sources: [7] [8] [9] [10] [11]

Myths

The following have been confirmed to be negative.

Expeditions Bonus

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

  • See here for more details

See Also