Akashi's Improvement Arsenal

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.
   
4. Move your cursor to that icon and click.

How to Use

• Improvement materials 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
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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					-	-	-
	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					-	-	-
	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					-	-	-
	15.2cm Twin Gun Mount	0	?	?	?	?			-
		6					?	?	?
		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
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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*		M						Yamato Kai Musashi Kai	Uses 46cm Triple Gun Mounts for improvement.
		6
		10					-	-	-
Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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					-	-	-
	OTO 152mm triple extended machine gun	0	10	90	120		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/?	3/?	1*
		10					-	-	-
Type	Name	★	Resource							Day							2nd Ship	Note
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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					-	-	-
	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
	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
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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
										Sun	Mon	Tue	Wed	Thu	Fri	Sat
	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					-	-	-
	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					-	-	-

Note

• Type 91 Anti-Aircraft Fire Director use 12.7cm Twin High-angle Mount for improvement past ★+6 and use 10cm Twin High-angle Mount for upgrading.
• Type 94 Anti-Aircraft Fire Director use 10cm Twin High-angle Mount(Akizuki and Fubuki Kai-2) or 12.7cm Twin High-angle Mount(Maya) for improvement. For upgrading: with Akizuki or Fubuki Kai-2 consumes 10cm Twin High-angle Mount to make 10cm Twin High-angle Mount + Anti-Aircraft Fire Director; with Maya Kai-2 consumes 12.7cm Twin High-angle Mount to make 12.7cm Twin High-angle Mount + Anti-Aircraft Fire Director
• 10cm Twin High-angle Mount + Anti-Aircraft Fire Director use 10cm Twin High-angle Mount for improvement past ★+6.
• 61cm Triple Torpedo Mount requires Fubuki or Fubuki Kai as 2nd ship, Fubuki Kai-2 not valid.
• 61cm Triple (Oxygen) Torpedo Mount use 61cm Triple Torpedo Mount for improvement past ★+6 and use 61cm Quad Torpedo Mount for upgrading.
• Type 1 AP Shell use Type 91 AP Shell for improvement before ★+6. Consumes itself past ★+6.
• 38cm Twin Gun Mount use 35.6cm Twin Gun Mount for improvement and use 41cm Twin Gun Mount for upgrading.
• 38cm Twin Gun Mount Kai use 41cm Twin Gun Mount for improvement.
• Prototype 46cm Twin Gun Mount use 41cm Twin Gun Mount for improvement and upgrading.
• 381mm / 50 Triple Gun Mount use 35.6cm Twin Gun Mount for improvement and 25mm Twin Autocannon Mount for upgrading.
• 381mm / 50 Triple Gun Mount kai use 41cm Twin Gun Mount for improvement.
• 90mm Single High Angled Gun use 10cm Twin High-angle Mount for improvement.
• OTO 152mm triple extended machine gun use 15.5cm Triple Gun Mount (Main) for improvement past ★+6.

Possible Upgrades

Type	Starting Equipment	Upgraded Equipment
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
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
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
	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
AP Shell	Type 91 Armor-Piercing (AP) Shell	Type 1 Armor-Piercing (AP) Shell
	Type 1 Armor-Piercing (AP) Shell	Impossible to upgrade
Light Gun	10cm Twin High-angle Mount + Anti-Aircraft Fire Director	Impossible to upgrade
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	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
Torpedo	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
Sonar	Type 93 SONAR	Type 3 SONAR ★+3
	Type 3 SONAR	Impossible to upgrade
DepthCharge	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		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
	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
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.