Improvement Material

Improvement Material () is a primary resource used for improvements in Akashi's Improvement Arsenal.

Improvement Materials can be obtained through the following methods:

• Certain quests reward Improvement Materials.
• Some event maps reward Improvement Materials upon clearing.
• Medals () can be exchanged for 4 Improvement Materials each. First Class Medal can be exchanged for 10. Present Box (), Mackerel and Hishimochi () can be exchanged for 1 Improvement Material each.
  • Those items can be obtained from quests, event and EO maps, and during special occasions, such as seasonal events or login rewards.
• The in-game cash shop sells them in a package of 10 Improvement Materials for 700 DMM points.

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Possible gain during a month (4 weeks) from repeatable quests and EO maps:

Quests			EO
Without F18 and Bw9	With F18	With Bw9	With 1-6	With
54	82	90	91	115

EO maps

1-5, 2-5, 3-5, 4-5, 5-5, and 6-5 all reward (4 each). 1-6 rewards (1). Thus, it is possible to obtain 25 from EO maps during a month.

Quest Rewards

These are the one-time and repeatable quests that reward (or items that can be exchanged for ).

Quest Type	Quest ID	Quest Name (JP)	Description		Note
Once	A44	「西村艦隊」を再編成せよ！	Have Fusou, Yamashiro, Mogami, Shigure, and Michishio in your fleet	3
	A45	改修工廠を準備せよ！	Have Akashi as flagship in your fleet	5
	A49	「第二二駆逐隊」を編成せよ！	Have only Satsuki, Fumizuki, Nagatsuki, and 1 more DD in your fleet	2
	A57	新編「第二一戦隊」出撃準備！	Have Nachi Kai Ni, Ashigara Kai Ni, Tama and Kiso in your fleet	2
	A60	「第四航空戦隊」を編成せよ！	Have Ise Kai and Hyuuga Kai in your fleet	2
	A64	「新編成航空戦隊」を編成せよ！	Have 2 CV/CVL, 2 BBV or CAV and 2 DD in your fleet	2
	A71	精鋭！八駆第一小隊！	Have Asashio Kai Ni D and Ooshio Kai Ni in your fleet	3
	B33	「西村艦隊」南方海域へ進出せよ！	Sortie Fusou, Yamashiro, Mogami, Shigure, Michishio, and 1 additional ship to 5-1 and obtain an S-Rank at the boss	5	(4)
	B37	「第二一駆逐隊」出撃せよ！	Sortie Hatsuharu, Nenohi, Wakaba, Hatsushimo, and 2 additional ships to 3-1 and obtain an S-Rank at the boss		()
	B38	「那智戦隊」抜錨せよ！	Sortie Nachi as flagship, Hatsushimo, Kasumi, Ushio, Akebono, and 1 additional ship to 2-2 and obtain an S-Rank at the boss	2
	B41	新編「三川艦隊」ソロモン方面へ！	Sortie Choukai Kai Ni as flagship and any combination of Furutaka, Kako, Aoba, Kinugasa, Yuubari and Tenryuu to 5-1 and obtain an S-Rank at the boss	3
	B44	海上突入部隊、進発せよ！	Sortie Hiei, Kirishima, Nagara, Akatsuki, Ikazuchi and Inazuma to 5-1 and obtain an S-rank at boss node	2
	B45	「第六駆逐隊」対潜哨戒を徹底なのです！	Sortie Akatsuki Kai Ni, Hibiki, Ikazuchi and Inazuma to 1-5 and obtain at least an A-Rank at the boss	2
	B47	「第一水雷戦隊」北方ケ号作戦、再突入！	Sortie Abukuma Kai Ni as flagship, Hibiki, Yuugumo, Naganami, Akigumo and Shimakaze to 3-2 and obtain an S-Rank at the boss	4
	B49	「空母機動部隊」北方海域に進出せよ！	Sortie a fleet with CV flagship to 3-5 and obtain an S-Rank at the boss	3
	B51	新編「第二一戦隊」北方へ出撃せよ！	Sortie Nachi Kai Ni, Ashigara Kai Ni, Tama, Kiso, and up to 2 additional ships to 2-2 and obtain an S-rank at the boss		()
	B52	「第十六戦隊(第一次)」出撃せよ！	Sortie Ashigara as flagship, Kuma, Nagara, and up to 3 additional ships to 2-2 and obtain an S-Rank at the boss		()
	B56	新編成航空戦隊、北方へ進出せよ！	Sortie 2 CV/CVL, 2 BBV or CAV and 2 DD to 3-3 and score an S-rank victory at the boss	2
	B57	「礼号作戦」実施せよ！	Sortie Kasumi as flagship, Ashigara, Ooyodo, Asashimo, Kiyoshimo and up to one additional ship to 2-5 and score an S-rank victory at the boss	3	()
	B59	旗艦「霞」出撃！敵艦隊を撃滅せよ！	Sortie a fleet with Kasumi Kai Ni as flagship, 2 DD and up to 3 additional ships to 2-5 and score an S rank victory at the boss	3
	B60	「第三十一戦隊」出撃せよ！	Sortie Isuzu Kai Ni as flagship, Satsuki Kai Ni, Uzuki Kai and up to 3 additional ships to 1-6 and reach the end node	3	()
	B62	強襲上陸作戦用戦力を増強せよ！	Sortie to 6-3 and obtain at least a B-Rank at the boss	3
	B63	製油所地帯を防衛せよ！	Sortie 1 CL and 5 DD to 1-3 and obtain 3 S-Ranks at the boss		(4)
	B65	オリョール海の制海権を確保せよ！	Sortie Ooshio as flagship to 2-3 and obtain 6 S-Ranks at the boss		(4)
	B66	旗艦「大潮」出撃せよ！	Sortie Ooshio Kai Ni as flagship to 3-5 and obtain an S-Rank at the boss	3
	B68	強行高速輸送部隊、出撃せよ！	Sortie Sendai Kai Ni, Kawakaze Kai Ni, Shigure Kai Ni, 2 DD and one wildcard to 4-1 and obtain at least an A-Rank at the boss	2
	B69	「第一航空戦隊」西へ！	Sortie Akagi as flagship, Kaga and up to four wildcards to 4-5 and obtain an S-Rank at the boss	3
	B72	「第三十一戦隊」敵潜を制圧せよ！	Sortie Isuzu Kai Ni as flagship, Satsuki Kai Ni, Uzuki Kai, and three wildcards to 1-6 and reach the goal point twice	2
	B74	精鋭「八駆第一小隊」対潜哨戒！	Sortie a fleet that includes Asashio Kai Ni D and Ooshio Kai Ni to 1-5 and score two S-rank at the boss	4
	B79	「第十九駆逐隊」敵主力に突入せよ！	Sortie Isonami, Uranami, Ayanami, Shikinami, and up to two wildcards to 2-5 and score at least an A-rank at the boss	4
	B86	輸送作戦を成功させ、帰還せよ！	Sortie Kinu Kai Ni as flagship, Uranami Kai, 3 DD and up to one non-DD wildcard to 2-2 and obtain an S-rank at the boss	5
	C6	演習を強化、艦隊の練度向上に努めよ！	Get 4 victories in PvP within the same day	1
	C7	北方再突入に備え、練度向上に努めよ！	Get 4 victories in PvP within the same day	1
	D18	観艦式を敢行せよ！	Complete Expedition 8	1
	D19	機動部隊の運用を強化せよ！	Complete Expeditions 35 and 26	2
	F17	はじめての「装備改修」！	Do equipment modernization 1 time	7	Consumes
	F36	はじめての「装備改修」！	Set Shimakaze as secretary and equip her with a ★max 61cm Quintuple (Oxygen) Torpedo Mount and a ★max 61cm Triple (Oxygen) Torpedo Mount. ※ Consumes 2 medals ※ Consumes the equipment	6
	Total			111
Daily	F18	装備の改修強化	Do equipment modernization 1 time (failure is 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 obtain an S-rank at the boss 2 times	2
	Bw10	海上輸送路の安全確保に努めよ！	Sortie to 1-5 and obtain at least an A-rank at the boss 3 times	3
	C4	大規模演習	Get 20 victories in PvP 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
	F34	對空機銃量產	Scrap 6 pieces of Anti-Air Guns	1	Requires F18 which cconsumes
Monthly	Bm3	「水雷戦隊」南西へ！	Sortie 1-3 CL, one as flagship, and 3-5 DD to 1-4 and obtain an S-Rank at the boss	3
	Bm4	「水上打撃部隊」南方へ！	Sortie 3 BB/BBV, 1 CL, and 2 additional ships to 5-1 and obtain an S-Rank at the boss	4
	Bm5	海上護衛強化月間	Sortie to 1-5 and obtain at least an A-Rank at the boss 10 times	3
	Bm6	「空母機動部隊」西へ！	Sortie 2 CVL/CV/CVB, 2 DD, and 2 additional ships to 4-2 and obtain an S-Rank at the boss	2
	Bm7	「水上反撃部隊」突入せよ！	Sortie 4 DD, one as flagship, 1 CA and 1 CL to 2-5 and obtain an S-Rank at the boss	2
	Bm8	兵站線確保！海上警備を強化実施せよ！	Sortie a fleet with a Light Cruiser/Light Aircraft Carrier, 3 Destroyers/Coastal Defense Ships, and up to 2 additional ships to Worlds 1-2, 1-3, 1-4 and 2-1. Obtain a S-rank at each boss node.	2
Quarterly	Bq1	沖ノ島海域迎撃戦	Sortie a fleet to World 2-4. Obtain a S-rank at the boss node twice.	5
	Bq2	戦果拡張任務！　「Ｚ作戦」前段作戦	Sortie a fleet to Worlds 2-4, 6-1, 6-3, and 6-4. Obtain an A-rank (or higher) at the boss node of 2-4, 6-1, and 6-3. Obtain a S-rank at the boss node of 6-4.	4
	Bq4	前線の航空偵察を実施せよ！	Sortie a fleet with 1 Seaplane Tender, 2 Light Cruisers, and 3 additional ships to World 6-3. Obtain an A-rank (or higher) at the boss node twice.	4
	Bq5	北方海域警備を実施せよ！	Sortie a fleet with 1 Light Cruiser and up to 5 additional ships to Worlds 3-1, 3-2, and 3-3. Obtain an A-rank (or higher) at each boss node.		(4)
	Bq7	新編成「三川艦隊」、鉄底海峡に突入せよ！	Sortie a fleet with 4 of Choukai, Aoba, Kinugasa, Kako, Furutaka, Tenryuu, and Yuubari and 2 additional ships to Worlds 5-1, 5-3, and 5-4. Obtain a S-rank at each boss node.	5
	Bq10	戦果拡張任務！「Z作戦」後段作戦	Sortie a fleet to Worlds 7-2, 5-5, 6-2, and 6-5. Obtain a S-rank at the boss node of 5-5, 6-2, and 6-5. Obtain a S-rank at the second boss node of 7-2.	4
	Bq11	南西諸島方面「海上警備行動」発令！	Sortie a fleet with 1 Light Aircraft Carrier/Light Cruiser, 3 or more Destroyers/Coastal Defense Ships and up to 2 additional ships to Worlds 1-4, 2-1, 2-2, and 2-3. Obtain a S-rank(?) at each boss node.	2
	Bq12	発令！「西方海域作戦」	Sortie a fleet to Worlds 4-1, 4-2, 4-3, 4-4, and 4-5. Obtain a S-rank(?) at each boss node.		(4)
	Bq13	拡張「六水戦」、最前線へ！	Sortie a fleet with Yuubari Kai Ni/Yuubari Kai Ni Toku/Yuubari Kai Ni D as flagship and one of the following two configurations: EITHER 2 of Yayoi, Mutsuki, Kisaragi, Mochizuki, Uzuki, Kikuzuki and up to 3 additional ships, OR Yura Kai Ni and up to 4 additional ships, to Worlds 5-1, 5-4, 6-4, and 6-5. Obtain a S-rank at each boss node.		(4)
	C38	「十八駆」演習！	Use a fleet with Kagerou, Shiranui, Kasumi, Arare, and up to 2 additional ships to obtain a S-rank in Exercises (PvP) 3 times within the same day.	3
	D26	近海に侵入する敵潜を制圧せよ！	Complete Expedition 4, A2, and A3 twice each.	3
	F55	新型艤装の継続研究	Prepare 18000 Steel in your inventory. Scrap 10 heavy guns.		(4)
	F67	運用装備の統合整備	Prepare 800 Bauxite in your inventory. Scrap 6 fighters and 4 anti-air guns.	4
Yearly	By1	精鋭「十九駆」、躍り出る！	Sortie a fleet with Ayanami Kai Ni, Shikinami Kai Ni, and up to 4 additional ships to Worlds 2-5, 3-4, 4-5, and 5-3. Obtain a S-rank(?) at each boss node.	4
	By2	「海防艦」、海を護る！	Sortie a fleet with 3 Coastal Defense Ships and up to 2 additional ships to Worlds 1-1, 1-2, 1-3, 1-5, and 1-6. Obtain a S-rank(?) at the boss node of 1-1, 1-2, 1-3, and 1-5 once. Reach the anchor node N of 1-6 once.		(4)
	By4	重巡戦隊、西へ！	Sortie a fleet with 3 Heavy Cruisers, 1 Destroyer, and up to 2 additional ships to Worlds 4-1, 4-2, 4-3, and 4-4. Obtain a A-rank (or higher) at each boss node once.	4

Repeatable Quests

The following are repeatable quests that reward (nesting used to show quest dependencies). Up to ~80-90 can be obtained during a month.

• Weekly 1: Launch your fleet 36 times, encounter 24 bosses, defeat (B+ Rank) 12 bosses, and get 6 S-Rank victories.
  Requires: Daily 1 and Daily 2.
  Note: 1-1 sparkling runs for expedition ships; any other sorties.
  • Weekly 4: Sink 50 Transport Ships.
    Note: 2-2 with 3 CLT + Abukuma Kai Ni (torpedo setup) + SS + wildcard (DD/CA/BB) (no carriers, can be optimized with Lv1 BB/CA); 2-3 with SS; 5-3 node P leveling; 5-4 runs.
    • Weekly 10 (3): Sortie to 1-5 and get at least an A-rank at the boss 3 times.
      Note: 3 OASW capable ships (DD/CL/CT) + Lv1 CVL (unequipped or with standard ASW gear, can be used twice), can be optimized with 2 more Lv1 ships (12/12 sortie cost for Satsuki Kai Ni with 3 Lv1 ships).
    • Monthly 3 (3): Sortie 1-3 CL, one as the flagship, and 3-5 DD to 1-4 and obtain an S-Rank at the boss.
    • Monthly 6 (2): Sortie 2 CV/CVL, 2 DD, and 2 additional ships to 4-2 and obtain an S-Rank at the boss.
      • Monthly 7 (2): Sortie 4 DD, one as flagship, 1 CA and 1 CL to 2-5 and obtain an S-Rank at the boss.
• Weekly 2: Sink 20 CV/CVL.
  Requires: Daily 5.
  Note: 2-3 with SS; 5-4 runs. Together with Weekly 3 (20 Transport Ships).
  • Weekly 5 (): Sink 15 Submarines.
    Note: same as Weekly 10.
    • Weekly 7 (3): Defeat 5 bosses in the 3-3/3-4/3-5
      Note: 3-3 with 2+ CVL/CV/CVB + CLTs/Abukuma Kai Ni (torpedo setup) + BB (optionally); 3-5 with Abukuma Kai Ni (torpedo setup) + 5 DD.
  • Weekly 6: Defeat 12 bosses in World 4.
    • Weekly 8: Defeat the boss in 4-4.
      • Weekly 9 (2): Sortie to 5-2 and get an S-Rank at the boss 2 times.
• Monthly 1: Sortie Myoukou, Nachi, Haguro, and 3 additional ships to 2-5 and obtain an S-Rank at the boss.
  • Monthly 5 (3): Sortie to 1-5 and obtain at least an A-Rank at the boss 10 times.
    Note: same as Weekly 10.
• Monthly 4 (4): Sortie 3 Slow BB, 1 CL, and 2 additional ships to 5-1 and obtain an S-Rank at the boss.
  Note Only slow BBs of the Nagato
  , Ise
  , Fusou
  and Yamato
  classes are allowed for this quest.
   
• C4 (Weekly Exercise) (): Get 20 victories in PvP within the same week.
  Requires: C2 (Daily Exercise)
• D11 (Weekly Expedition) (): Complete Expedition 37 or 38 a total of 7 times in a week.
  Requires: D9 (Weekly Expedition)
• F18 (Daily Modernization) ( - spent): Do equipment modernization 1 time.
  Requires: F5 (Daily Development) → F6 (Daily Construction) → F7 (Daily Development) → F8 (Daily Construction)
• F34 (Weekly AA Guns Scrapping) (): Scrap 6 pieces of Anti-Air Guns.
  Requires: F18 (Daily Modernization) ( - spent) → F34 (Weekly AA Guns Scrapping) ()

See Also

• Reddit flowchart
• Related Wikia blog posts:
  • User blog:Hayashi H/Max-efficiency Map-clear Formations
  • User blog:Racoontail/Kancolle Improvement Material (Repeatable Quest Rewards) Flowchart: Organization and Priorities
  • User blog:Racoontail/Improvement Material Gathering Guide - A Monthly and Weekly Quest Helper