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Akashi's Improvement Arsenal

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This gameplay mechanic is made accessible by having Akashi or Akashi Kai as your secretary.

Equipment can be improved here and sometimes upgraded into new, better equipment. Different equipment can be improved based on the day of the week and which ship you have in the second slot of your first fleet.

How to Enter

  1. Set Akashi or Akashi Kai as your secretary (first ship of the first fleet).
  2. At the home screen, hover your cursor over the factory icon (do not click).
  3. The Improvement Arsenal icon will appear next to it as shown.
    Kaishu koushou.png
  4. Move your cursor to that icon and click.

How to Use

  • Improvement materials Item Icon Improvement Material.png are the primary component for improvement. They can be obtained through the following means:
  1. Specific quests
  2. 4 improvement materials in exchange for a medal.
  3. The in-game cash shop, which sells them in packages of 10 for 700 DMM points.
  4. Event map clearance rewards and first class medals, the latter of which yields 10.
  • The 2nd ship in your first fleet determines which upgrades are available.
  • Improvements can fail.
    • Your chance of failure rises with equipment improvement ranking.
    • Your success rate is higher when using a remodeled Akashi.
    • On failure, components used will disappear; however, the equipment being upgraded remains unchanged.
    • There is a slider that guaranteed success in exchange for an increase in required development and improvement materials.
  • Equipment that has been improved will have a ★. Improvement ranks range from ★+1 to ★+10. ★+10 appears as ★max.
  • All improvement attempts from ★+6 onward use up equipment (most of the time this is the same as the equipment being upgraded). This requirement is present on some equipment even from ★+0.
    • Locked and previously improved equipment cannot be used as improvement fodder.
    • As equipment is spent even on failure, you are recommended to use the success slider when improvements consume rare equipment.
  • There is no visible stat difference between improved and unimproved equipment.
    • Improvements on equipment have been shown to increase firepower, torpedo and ASW stats depending on the category of the equipment.
      • It's possible that this bonus is possibly not directly added to the firepower/torpedo value in damage calculations, but is instead added as a flat bonus.
    • Japanese sources are currently testing the effect of improvements. Preliminary results as of 2014/12/10 are:
      • 12.7cm Twin Gun Mount and similar (not specified in wikiwiki)
        • ★+1~3: +1 bonus to firepower/torpedo
        • ★+4~8: +2 bonus to firepower/torpedo
        • ★+9~10: +3 bonus to firepower/torpedo
      • 35.6cm Twin Gun Mount:
        • ★+1: +1 bonus to firepower
        • ★+2~4: +2 bonus to firepower
        • ★+5~7: +3 bonus to firepower
        • ★+8~10: +4 bonus to firepower
      • Depth charges and sonars are reported to boost firepower and ASW.
  • If the equipment reaches the maximum improvement level (★max), it can sometimes be upgraded into stronger equipment. Be aware that the equipment's improvement level will reset, and a ★+10 equipment could be stronger than its unimproved upgrade.
    • If the new equipment after upgrading is something you can develop from conventional development, the improvement level will be automatically set to ★+3 (or ★+5 in a few cases).
    • This has a higher chance of failure than normal improvement.

Possible Improvements

Equipment that can be improved depends on the day of the week and the ship in the second slot of the first fleet. Changes at 0:00 JST.

When the 2nd Ship varies by day, the ship's Initial is used; '✓' denotes that either may be used.

Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
High-Angle Gun 10cm Twin High-angle Mount +
Anti-Aircraft Fire Director 		0 10 60 150 50 6/7 3/4 - X ✓ ✓ ✓ ✓ X X Akizuki Uses 10cm Twin High-angle Mounts for improvement past ★+6.
6 5/8 4/7 2*
10 - - -
Small Caliber Main Gun 12.7cm Twin Gun Mount 0 10 30 60 0 1/2 1/2 - ✓ ✓ ✓ ✓ ✓ ✓ ✓ -
6 1/2 1/2 1
10 2/3 3/6 2
12.7cm Twin Mount Type-B Kai 2 0 10 60 100 0 2/2 2/3 - X ✓ ✓ ✓ X X X Yuudachi Kai-2
Ayanami Kai-2
6 2/2 2/4 1
10 - - -
Medium Caliber Main Gun 14cm Naval Gun 0 10 50 80 0 1/2 1/2 - ✓ ✓ ✓ ✓ ✓ ✓ ✓ -
6 1/2 1/2 1
10 3/4 3/6 2
14cm Twin Gun Mount 0 10 60 100 0 2/2 1/2 - X ✓ X X ✓ X X Yuubari
6 2/4 2/3 1
10 - - -
15.5cm Triple Gun Mount (Main) 0 10 90 120 0 2/2 2/3 0 O O X X X M M Mogami
Ooyodo
6 2/3 2/4 1
10 - - -
20.3cm Twin Gun Mount 0 10 90 120 0 1/2 2/3 - ✓ ✓ ✓ ✓ ✓ ✓ ✓ Aoba
Kinugasa
6 2/3 2/3 1
10 2/5 4/10 2
20.3cm(no.2) Twin Gun Mount 0 10 100 130 0 2/3 2/3 - ✓ ✓ ✓ X X X X Myoukou
6 2/4 2/4 1
10 4/8 4/11 2
20.3cm(no.3) Twin Gun Mount 0 10 110 140 0 3/4 2/3 - X X ✓ ✓ X X X Mikuma
6 3/5 3/5 1
10 - - -
Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Large Caliber Main Gun 35.6cm Twin Gun Mount 0 20 240 300 0 2/3 1/2 - ✓ X X X X ✓ ✓ Fusou
6 3/4 2/4 1
10 6/12 5/12 3
38cm Twin Gun Mount 0 20 380 450 20 4/5 2/3 1* X X X X ✓ ✓ ✓ Bismarck Uses 35.6cm Twin Gun Mounts for improvement.
Uses 41cm Twin Gun Mounts for upgrading.
6 5/8 3/5 2*
10 10/20 6/13 2*
38cm Twin Gun Mount Kai 0 30 390 470 30 5/7 3/4 1* ✓ ✓ ✓ X X X X Bismarck Uses 41cm Twin Gun Mounts for improvement.
6 6/9 4/6 2*
10 - - -
381mm / 50 Triple Gun Mount 0 30 400 480 20 4/5 2/3 1* R R L L L L R Littorio/Italia
Roma 		Uses 35.6cm Twin Gun Mounts for improvement.
Uses 25mm Twin Autocannon Mounts for upgrading.
6 5/8 3/5 2*
10 12/20 7/14 2*
381mm / 50 Triple Gun Mount kai 0 40 440 500 50 4/7 3/4 1* L L R R R R L Littorio
Roma 		Uses 41cm Twin Gun Mounts for improvement.
6 7/10 4/6 2*
10 - - -
41cm Twin Gun Mount 0 30 350 480 0 3/4 2/3 1 M M N X M N N Nagato
Mutsu
6 4/7 3/6 2
10 - - -
Prototype 46cm Twin Gun Mount 0 40 420 650 40 5/6 3/5 2* Y Y M M X X X Yamato
Musashi 		Uses 41cm Twin Gun Mounts for improvement and when upgrading.
6 6/8 4/7 3*
10 12/18 8/14 4*
46cm Triple Gun Mount 0 50 480 800 50 6/8 4/6 1 M M X X X Y Y Musashi
Yamato
6 8/10 5/8 2
10 - - -
Prototype 51cm Twin Cannon 0 50 550 950 80 7/9 5/7 2* ✓ Y M X X X Yamato Kai
Musashi Kai 		Uses 46cm Triple Gun Mounts for improvement.
6 10/15 7/10 3*
10 - - -
Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates different equipment is required. Sun Mon Tue Wed Thu Fri Sat
High-Angle Gun 90mm Single High Angled Gun 0 10 20 70 10 1/2 1/2 1* R L L L ✓ R R Littorio
Roma 		Uses 10cm Twin High-angle Mounts for improvement.
6 2/3 1/2 2*
10 - - -
Secondary Gun OTO 152mm triple extended machine gun 0 10 90 120 0 2/3 2/3 - ✓ R L L R R L Littorio
Roma 		Uses 15.5cm Triple Gun Mounts (Main) for improvement past ★+6.
6 3/4 3/5 1*
10 - - -
15.2cm Naval Gun 0 10 60 90 0 2/2 1/2 - A/K/Y/ A/Y Y X X K Agano, Kongou
Yamashiro
6 ? ? ?
10 - - -
Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Armor-Piercing Shell Type 91 AP Shell 0 30 150 310 10 2/3 1/1 - K K X H H ✓ ✓ Hiei
Kirishima
6 3/5 1/2 1
10 6/9 4/9 3
Type 1 AP Shell 0 30 170 330 20 3/5 1/1 2* K H H H X K K Kongou
Haruna 		Uses Type 91 AP Shells for improvement before ★+6.
Uses Type 1 AP Shells past ★+6.
6 4/6 2/4 1
10 - - -
Anti-Aircraft Gun 25mm Twin Autocannon Mount 0 0 20 10 10 0/1 1/1 - ✓ X X X X ✓ ✓ Isuzu Kai-2
6 1/2 1/2 1
10 2/3 1/2 1
25mm Triple Autocannon Mount 0 0 30 20 10 1/2 1/1 - X I ✓ ✓ M X X Isuzu Kai-2
Maya
6 1/3 1/2 1
10 5/9 3/7 5
Anti-Aircraft Fire Director Type 91 Anti-Aircraft Fire Director 0 0 0 60 40 3/4 1/2 - ✓ ✓ X X X ✓ ✓ Maya
Akizuki 		Uses 12.7cm Twin High-angle Mounts for improvement past ★+6.
Uses 10cm Twin High-angle Mounts for upgrading.
6 3/5 2/4 1*
10 4/9 4/7 2*
Type 94 Anti-Aircraft Fire Director 0 0 0 80 70 4/5 2/3 - ✓ A A A ✓ ✓ ✓ Akizuki
Fubuki Kai-2 		Uses 10cm Twin High-angle Mounts for improvement.
Upgrades into 10cm Twin High-angle Mount + Anti-Aircraft Fire Director.
6 3/5 3/5 1*
10 8/10 5/10 2*
0 4/5 2/3 - ✓ X X X ✓ ✓ ✓ Maya Kai-2 Uses 12.7cm Twin High-angle Mounts for improvement.
Upgrades into 12.7cm Twin High-angle Mount + Anti-Aircraft Fire Director.
6 3/5 3/5 1*
10 7/9 5/9 2*
Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Torpedoes 61cm Triple Torpedo Mount 0 50 70 60 20 1/2 1/1 - M M M X F F F Fubuki
Murakumo 		Fubuki Kai Ni cannot be used.
6 2/3 1/2 1
10 3/5 2/4 2
61cm Triple (Oxygen) Torpedo Mount 0 60 90 60 20 1/2 1/1 - X X X X ✓ ✓ ✓ Fubuki Kai-2 Uses 61cm Triple Torpedo Mounts for improvement past ★+6.
Uses 61cm Quad Torpedo Mounts for upgrading.
6 3/5 1/3 1*
10 4/8 3/6 2*
61cm Quad Torpedo Mount 0 70 100 70 20 1/2 1/2 - ✓ ✓ ✓ X X ✓ ✓ -
6 2/3 1/2 1
10 3/5 3/6 2
61cm Quad (Oxygen) Torpedo Mount 0 80 120 80 20 2/3 1/2 - ✓ ✓ ✓ ✓ ✓ ✓ ✓ Ooi
Kitakami
6 4/8 2/4 1
10 5/10 5/11 3
61cm Quint (Oxygen) Torpedo Mount 0 100 150 90 30 3/4 3/5 - X X X ✓ ✓ X X Shimakaze
6 5/9 3/7 1
10 - - -
Type Name ★ Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
SONAR Type 93 SONAR 0 10 0 30 30 2/2 1/2 - Y I X X X ✓ ✓ Isuzu Kai-2
Yuubari
6 3/4 2/3 1
10 6/9 3/5 2
Type 3 SONAR 0 10 0 30 50 4/5 2/3 - I X ✓ ✓ X X X Isuzu Kai-2
Yuubari
6 5/7 3/5 1
10 - - -
Depth Charges Type 94 Depth Charge 0 10 60 20 20 1/2 1/2 - X X X ✓ ✓ X X -
6 2/3 1/3 1
10 3/6 3/8 2
Type 3 Depth Charge 0 10 80 20 30 3/3 2/3 - X X X ✓ ✓ X X Isuzu Kai-2
6 3/5 2/4 1
10 - - -

Possible Upgrades

Type Starting Equipment Upgraded Equipment
Small Caliber Main Gun / High-Angle Gun Light Gun 12.7cm Twin Gun Mount 12.7cm Twin Mount Type-B Kai 2
12.7cm Twin Mount Type-B Kai 2 Impossible to upgrade
10cm Twin High-angle Mount + Anti-Aircraft Fire Director Impossible to upgrade
Medium Caliber Main Gun Medium Gun 14cm Naval Gun 14cm Twin Gun Mount
14cm Twin Gun Mount Impossible to upgrade
15.5cm Triple Gun Mount (Main) Impossible to upgrade
20.3cm Twin Gun Mount 20.3cm(no.2) Twin Gun Mount
20.3cm(no.2) Twin Gun Mount 20.3cm(no.3) Twin Gun Mount
20.3cm(no.3) Twin Gun Mount Impossible to upgrade
Large Caliber Main Gun Heavy Gun 35.6cm Twin Gun Mount Prototype 35.6cm Triple Gun Mount
38cm Twin Gun Mount 38cm Twin Gun Mount Kai ★+3
38cm Twin Gun Mount Kai Impossible to upgrade
381mm / 50 Triple Gun Mount 381mm / 50 Triple Gun Mount kai ★+3
381mm / 50 Triple Gun Mount kai Impossible to upgrade
41cm Twin Gun Mount Impossible to upgrade
46cm Twin Gun Mount Prototype 46cm Triple Gun Mount ★+5
46cm Triple Gun Mount Impossible to upgrade
Prototype 51cm Twin Cannon Impossible to upgrade
High-Angle Gun / Secondary Gun Auxiliary Gun 90mm Single High Angled Gun Impossible to upgrade
OTO 152mm triple extended machine gun Impossible to upgrade
15.2cm Naval Gun 15.2cm Twin Gun Mount
Armor-Piercing Shell AP Shell Type 91 Armor-Piercing (AP) Shell Type 1 Armor-Piercing (AP) Shell
Type 1 Armor-Piercing (AP) Shell Impossible to upgrade
Anti-Aircraft Gun Anti-Air Gun 25mm Twin Autocannon Mount 25mm Triple Autocannon Mount ★+3
25mm Triple Autocannon Mount* 25mm Triple Autocannon Mount (Concentrated Deployment)
Anti-Aircraft Fire Director Anti-Aircraft Fire Director Type 91 Anti-Aircraft Fire Director Type 94 Anti-Aircraft Fire Director
Type 94 Anti-Aircraft Fire Director* 10cm Twin High-angle Mount + Anti-Aircraft Fire Director
12.7cm Twin High-angle Mount + Anti-Aircraft Fire Director
TorpedoesTorpedo 61cm Triple Torpedo Mount 61cm Triple O2 Torpedo Mount
61cm Triple O2 Torpedo Mount 61cm Quad O2 Torpedo Mount ★+5
61cm Quad Torpedo Mount 61cm Quad O2 Torpedo Mount ★+3
61cm Quad O2 Torpedo Mount 61cm Quint O2 Torpedo Mount
61cm Quint O2 Torpedo Mount Impossible to upgrade
SONARSonar Type 93 SONAR Type 3 SONAR ★+3
Type 3 SONAR Impossible to upgrade
Depth ChargesDepthCharge Type 94 Depth Charge Type 3 Depth Charge ★+3
Type 3 Depth Charge Impossible to upgrade

*The Type 94 Anti-Aircraft Fire Director upgrades to the 10cm Twin High-angle Mount + Anti-Aircraft Fire Director with Akizuki and Fubuki Kai-2 or the 12.7cm Twin High-angle Mount + Anti-Aircraft Fire Director with Maya Kai-2.

*Upgrading 25mm Triple Autocannon Mount to 25mm Triple Autocannon Mount (Concentrated Deployment) requires Maya Kai-2 as 2nd ship. Maya and Maya Kai won't work.

Improvement Material (Quest Rewards)

Quest Type Quest ID Quest Name (JP) Description Item Icon Improvement Material.png Note
Once A45 改修工廠を準備せよ！ Have Akashi as flagship in your main fleet. 5
F17 はじめての「装備改修」！ Do equipment modernization 1 time 7 consumes Item Icon Improvement Material.png
A44 「西村艦隊」を再編成せよ！ Organize the Nishimura Fleet 3
B33 「西村艦隊」南方海域へ進出せよ！ Deploy the Nishimura Fleet to 5-1 and obtain S-victory at boss node 5
Daily F18 装備の改修強化 Do equipment modernization 1 time (failure OK) 1 Consumes 1+ Item Icon Improvement Material.png in order
to complete, thus cannot gain
Weekly Bw5 海上護衛戦 Sink 15 submarines. 1
Bw7 敵北方艦隊主力を撃滅せよ！ Defeat 5 bosses in the Northern Sea (3-3, 3-4, or 3-5). 3
Bw9 南方海域珊瑚諸島沖の制空権を握れ！ Sortie to 5-2 and get S-rank at the boss node 2 times. 2
Bw10 海上輸送路の安全確保に努めよ！ Sortie to 1-5 and get at least A-rank at the boss node 3 times. 3
C4 大規模演習 Get 20 victories in practice mode within the same week. 1
D11 南方への鼠輸送を継続実施せよ! Complete Expedition 37 or 38 a total of 7 times in a week. 1
Monthly Bm3 「水雷戦隊」南西へ！ Deploy a Torpedo Squadron to 1-4 and win S-victory at boss node. 3
Bm4 「水上打撃部隊」南方へ！ Deploy a Battleship Squadron to 5-1 and win S-victory at boss node. 4
Bm5 海上護衛強化月間 Dispatch a fleet to 1-5. You must reach the boss and achieve A-rank victory or above 10 times 3
Bm6 「空母機動部隊」西へ！ Dispatch a fleet consisting of 2 CV, 2 DD and additional 2 ships to 4-2. You must reach the boss an achieve S-rank Victory. 2
Bm7 「水上反撃部隊」突入せよ！ Consists of 1 CA 1 CL 4 DD. You MUST deploy to World 2-5, and obtain an S-Rank victory at the boss node. Flagship MUST be DD. 2

Trivia

  • Akashi is animated on the Improvement Arsenal screen, blinking her eyes and occasionally looking towards the options on the left.
    • She also has two separate sprites for her basic and Kai forms, reflecting her headband and heftier rigging.


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