All equipment Improvement through the Akashi's Improvement Arsenal require specific "helper ships" to second Akashi. Depending on the ship second to Akashi, its remodel, and the day of the week, the set of equipment that can be improved will change.

Do note that certain ships are incapable of "upgrading" some equipment even though they are able to improve them to ,
In some cases, an equipment can be upgraded into 2 or 3 different new equipment, with the helper determining the result.

The following equipment do not require any specific helper, and can be improved in all cases where they are not overtaken by other help upgrades, including when Akashi is alone in the fleet:

List of ships and their related quests

For a given equipment:

"Improvement" means that the relevant ship can only improve said equipment but not improve it,
"Upgrade" means that the relevant ship can both improve and upgrade said equipment (on at least one of her remodels),

N° 1-10

N°	Ship	Improvement	Upgrade
001	Nagato	Type 1 Land-based Attack Aircraft (Hachiman Force)	41cm Twin Gun Mount, Anti-torpedo Bulge (Large), Prototype 41cm Triple Gun Mount, 41cm Triple Gun Mount Kai
002	Mutsu	Type 3 Shell Kai, 41cm Twin Gun Mount Kai 2, Type 1 Armor Piercing Shell Kai	41cm Twin Gun Mount, Anti-torpedo Bulge (Large), Prototype 41cm Triple Gun Mount, 41cm Triple Gun Mount Kai,
003	Ise	Type 32 Surface Radar Kai, 12cm 30-tube Rocket Launcher Kai 2, 41cm Triple Gun Mount Kai 2,	Zuiun, Type 21 Air Radar, Type 32 Surface Radar, 12cm 30-tube Rocket Launcher, Ka Type Observation Autogyro, Zuiun (634 Air Group), Zuiun Model 12 (634 Air Group)
004	Hyuuga	Type 32 Surface Radar Kai, S-51J Kai, 12cm 30-tube Rocket Launcher Kai 2, Zuiun Kai 2 (634 Air Group)	Zuiun, Type 22 Surface Radar, Type 21 Air Radar, Type 32 Surface Radar, 12cm 30-tube Rocket Launcher, Zuiun (634 Air Group), Zuiun (634 Air Group/Skilled), O Type Observation Autogyro Kai, O Type Observation Autogyro Kai 2, S-51J
005	Yukikaze Dan Yang	Type 13 Air Radar Kai	12.7cm Twin Gun Mount Model C Kai 2
006	Akagi		Type 0 Fighter Model 21, Type 0 Fighter Model 21 (Skilled), Type 0 Fighter Model 32, Type 0 Fighter Model 32 (Skilled), Shiden Model 11
007	Kaga		Type 0 Fighter Model 21, Type 0 Fighter Model 21 (Skilled), Type 0 Fighter Model 32, Type 0 Fighter Model 32 (Skilled), Shiden Model 11
008	Souryuu	Type 97 Torpedo Bomber, Type 2 Reconnaissance Aircraft	Type 99 Dive Bomber (Egusa Squadron), Type 99 Dive Bomber
009	Hiryuu		Type 99 Dive Bomber, Type 97 Torpedo Bomber (Tomonaga Squadron), Type 97 Torpedo Bomber
010	Shimakaze	61cm Quintuple (Oxygen) Torpedo Mount, New Model High Temperature High Pressure Boiler, Prototype 61cm Sextuple (Oxygen) Torpedo Mount	Type 22 Surface Radar, Enhanced Kanhon Type Boiler

N° 11-20

N°	Ship	Improvement	Upgrade
011	Fubuki	12.7cm Twin Gun Mount Model A Kai 3 (Wartime Modification) + Anti-Aircraft Fire Director	61cm Triple (Oxygen) Torpedo Mount, 61cm Triple Torpedo Mount, 61cm Triple (Oxygen) Torpedo Mount, 12.7cm Twin Gun Mount Model A Kai 2
012	Shirayuki		25mm Single Autocannon Mount
013	Hatsuyuki
014	Miyuki	61cm Triple (Oxygen) Torpedo Mount Late Model, Smoke Generator (Smoke Screen)	61cm Triple Torpedo Mount, 61cm Triple (Oxygen) Torpedo Mount, 12.7cm Twin Gun Mount Model A Kai 2
015	Murakumo	61cm Triple Torpedo Mount	12.7cm Twin Gun Mount Model A Kai 2
016	Isonami	61cm Triple (Oxygen) Torpedo Mount Late Model, 12.7cm Twin Gun Mount Model A Kai 3 (Wartime Modification) + Anti-Aircraft Fire Director	61cm Triple Torpedo Mount, 61cm Triple (Oxygen) Torpedo Mount, 12.7cm Twin Gun Mount Model A Kai 2
017	Ayanami	61cm Triple (Oxygen) Torpedo Mount Late Model	61cm Triple Torpedo Mount, 12.7cm Twin Gun Mount Model B Kai 2, Searchlight, 61cm Triple (Oxygen) Torpedo Mount
018	Shikinami	12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director	61cm Triple Torpedo Mount, 61cm Triple Torpedo Mount
019	Ooi		61cm Quadruple (Oxygen) Torpedo Mount
020	Kitakami	Type 42 Air Radar	61cm Quadruple (Oxygen) Torpedo Mount

N° 21-30

N°	Ship	Improvement	Upgrade
021	Kongou	Type 1 Armor Piercing Shell Kai, Type 3 Shell Kai, Type 3 Shell Kai 2	15.2cm Single Gun Mount, Type 3 Shell, Type 22 Surface Radar Kai 4, Prototype 35.6cm Triple Gun Mount, Type 1 Armor Piercing Shell, 35.6cm Twin Gun Mount Kai
022	Hiei	Type 0 Passive Sonar, Type 96 150cm Searchlight	Type 3 Shell, Type 91 Armor Piercing Shell, Prototype 35.6cm Triple Gun Mount, Type 3 Shell Kai, 35.6cm Twin Gun Mount Kai
023	Haruna	Type 1 Land-based Attack Aircraft Model 34	Type 3 Shell, Prototype 35.6cm Triple Gun Mount, 35.6cm Twin Gun Mount (Dazzle Camouflage), Type 1 Armor Piercing Shell, Shiden Model 21 Shiden Kai, 35.6cm Triple Gun Mount Kai (Dazzle Camouflage), 35.6cm Twin Gun Mount Kai 3 (Dazzle Camouflage)
024	Kirishima	Type 96 150cm Searchlight	Type 3 Shell, Type 91 Armor Piercing Shell, Type 1 Land-based Attack Aircraft Model 22A
025	Houshou	Type 96 Fighter Kai, Type 0 Fighter Model 64 (Skilled Fighter-bomber)	Type 97 Torpedo Bomber, Type 96 Fighter, Type 97 Torpedo Bomber (Skilled), Type 0 Fighter Model 64 (Air Superiority Fighter Specification)
026	Fusou	Prototype 35.6cm Triple Gun Mount	35.6cm Twin Gun Mount, 15.2cm Single Gun Mount, Type 96 Land-based Attack Aircraft
027	Yamashiro	Prototype 35.6cm Triple Gun Mount	Zuiun Model 12 (634 Air Group), Type 1 Land-based Attack Aircraft
028	Tenryuu	12.7cm Twin High-angle Gun Mount (Late Model)
029	Tatsuta	53cm Twin Torpedo Mount	Daihatsu Landing Craft
030	Ryuujou

N° 31-40

N°	Ship	Upgrade
031	Mutsuki	12cm Single Gun Mount, 12cm Single Gun Mount Kai 2
032	Kisaragi	12cm Single Gun Mount, 12cm Single Gun Mount Kai 2
033	Satsuki	25mm Twin Autocannon Mount, 25mm Single Autocannon Mount, Daihatsu Landing Craft, Daihatsu Landing Craft (Type 89 Medium Tank & Landing Force)
034	Fumizuki	25mm Twin Autocannon Mount, 25mm Single Autocannon Mount
035	Nagatsuki
036	Kikuzuki
037	Mikazuki
038	Mochizuki
039	Kuma
040	Tama

N° 41-50

N°	Ship	Improvement	Upgrade
041	Kiso
042	Nagara
043	Isuzu	Type 3 Depth Charge Projector, Type 3 Active Sonar, Type 4 Passive Sonar	Type 13 Air Radar, 25mm Twin Autocannon Mount, 25mm Triple Autocannon Mount, Type 93 Passive Sonar
044	Natori
045	Yura	12.7cm Single High-angle Gun Mount (Late Model), Type 0 Reconnaissance Seaplane Model 11B
046	Sendai	Type 98 Reconnaissance Seaplane (Night Recon)
047	Jintsuu		Searchlight
048	Naka	12.7cm Twin High-angle Gun Mount (Late Model)	Type 95 Depth Charge
049	Chitose		Type 0 Reconnaissance Seaplane
050	Chiyoda		Type 0 Reconnaissance Seaplane, Type A Kouhyouteki

N° 51-60

N°	Ship	Improvement	Upgrade
051	Mogami	15.5cm Triple Gun Mount, Type 21 Air Radar Kai 2, Kyoufuu Kai 2	Zuiun, Type 21 Air Radar, Zuiun Model 12, Zuiun Model 12 (634 Air Group), Zuiun Kai 2 (634 Air Group)
052	Furutaka
053	Kako
054	Aoba		20.3cm Twin Gun Mount, Searchlight
055	Myoukou	Type 22 Surface Radar Kai 4	20.3cm (No.2) Twin Gun Mount
056	Nachi
057	Ashigara
058	Haguro	Type 22 Surface Radar Kai 4
059	Takao
060	Atago