English Assault! Buin Defense Operation[Edit]
Japanese 邀撃!ブイン防衛作戦
Romaji Yōgeki! Buin bōei sakusen
Start December 26th, 2018 End January 22nd, 2019 (extended)
Scale Small New Content 4 ships, 2 equipments, 3 abyssals
Maps 2 MO + 1 EO Duration 4 weeks
Please Read before Event Start.jpg

Important Notice for all Players before Event Start[edit | edit source]

Before you start the Event[edit | edit source]

  • A friendly reminder that once you clear a map — destroying the gauge by sinking the boss on her final form — at your chosen difficulty, there is no going back to change it.
  • Please read the mechanics tab first - especially 'Ship locking' and 'Difficulty selection' — or the Info tab to plan before starting. Consider asking the Discord channel for help.
    • Anyone who wishes to tackle Medium+ should not rush into the map. Check other maps and see their requirements unless you wish to fight later maps
  • Remember that under normal circumstances your final objective of every map is sinking the boss. You only need to deplete the gauge and sink boss one last time in order to clear a map; sinking any escort ships is optional.

Classification Clarification[edit | edit source]

In the guide, you may see the following: CA(V), CV(L/B), (f)BB(V). These parentheses mean that the following sub-class also satisfy the branching rule requirements. For example, CV(L) means that both aircraft and light-aircraft carrier are acceptable while CV(L/B) also include armored-aircraft carrier into the requirement.

Winter 2019 Event Historical Ships with Bonus[edit | edit source]

There are specific ships with Bonus Damage against the Bosses of each Map. Please look through the list to plan out the Fleet you will use for each respective Maps.

  • Certain Ships have Bonus in multiple Maps
    • Unless you are doing Casual/Easy Mode, please make sure to check the Ships who has Bonus on multiple maps so that you choose a specific map to use her.

Ship Damage Bonus Ship Damage Bonus
Destroyer (DD)
MurasameMurasame Kai Ni 1.50 MinegumoMinegumo Kai 1.50
Shiratsuyu-classShiratsuyu
Shigure
Yuudachi
Harusame
Samidare
Umikaze
Yamakaze
Kawakaze
Suzukaze
1.30 Asashio-classAsashio
Ooshio
Arashio
Michishio
Asagumo
Yamagumo
Arare
Kasumi
1.30
Light Cruiser (CL)
JintsuuJintsuu Kai Ni 1.44 YuraYura Kai Ni 1.25
Non-Stackable Radar Bonus
Requires 2 Gun + 1 Radar setup 1.15

Ship Damage Bonus Sample Size Ship Damage Bonus Sample Size
Destroyer (DD)
AkatsukiAkatsuki Kai Ni 1.53 ~ 1.55 26 AyanamiAyanami Kai Ni 1.64 ~ 1.63 39
FubukiFubuki Kai Ni 1.48 ~ 1.6 8 InazumaInazuma Kai 1.3 ~ 1.31 11
MakigumoMakigumo Kai Ni 1.5 ~ 1.51 13 MurakumoMurakumo Kai Ni 1.26 ~ 1.32 9
NaganamiNaganami Kai Ni 1.28 ~ 1.32 15 UshioUshio Kai Ni 1.33 ~ 1.34 22
VerniyVerniy 1.25 ~ 1.32 7 YuudachiYuudachi Kai Ni 1.54 ~ 1.54 53
YuugumoYuugumo Kai Ni 1.29 ~ 1.32 15
Light Cruiser (CL)
JintsuuJintsuu Kai Ni 1.91 ~ 1.9 73 NakaNaka Kai Ni 1.31 ~ 1.36 5
SendaiSendai Kai Ni 1.52 ~ 1.52 17 YuraYura Kai Ni 1.47 ~ 1.43 49
Heavy Cruiser (CA)
FurutakaFurutaka Kai Ni 1.34 ~ 1.37 67
Battleship (BB)
HieiHiei Kai Ni
Hiei Kai
1.43 ~ 1.43 66 KirishimaKirishima Kai Ni 1.43 ~ 1.42 134

Ship Damage Bonus Ship Damage Bonus
Destroyer (DD)
Base With ZZ Base With ZZ

IsokazeIsokaze B Kai
  ArashiArashi
HagikazeHagikaze
HatsukazeHatsukaze

1.75 2.0125

KawakazeKawakaze Kai Ni

1.45 1.6675

Mutsuki ClassMutsuki Kai NiKisaragi Kai Ni
YayoiUzuki
Satsuki Kai NiMinazuki
Fumizuki Kai NiNagatsuki
KikuzukiMikazuki
Mochizuki

Other Kagerou ClassKagerou Kai NiShiranui Kai Ni
Kuroshio Kai NiOyashio
HatsukazeYukikaze
AmatsukazeTokitsukaze
Urakaze D KaiHamakaze B Kai
Tanikaze D KaiNowaki
MaikazeAkigumo

ShigureShigure Kai Ni
NenohiNenohi Kai
SamidareSamidare Kai
ShiratsuyuShiratsuyu Kai Ni
NaganamiNaganami Kai Ni
YuugumoYuugumo Kai Ni
HatsushimoHatsushimo Kai Ni

1.3 1.495

Other DDs

1.15 1.3225
Light Cruiser (CL)
SendaiSendai Kai Ni
1.25
Heavy Cruiser (CA)

MyoukouMyoukou Kai Ni

1.25
HaguroHaguro Kai Ni
1.25
Seaplane Tender (AV)
NisshinNisshin 1.75 2.275 Other AVs 1.15 1.495
ZZ Bonus (Does NOT apply to E3S)
Destroyers (DD)
1.15
Seaplane Tender (AV)
1.3

Surface Radar Requirement[edit | edit source]

The Winter 2019 Event has implemented a new requirement where the player's fleet must have a certain amount of Ships who each respectively has a "Surface Radar" equipped for Branching Rules.

  • This includes a new mechanic called "Radar Ambush" Nodes. Failing to avoid an ambush will have the enemy ships take free shots on your fleet without any retaliation from you. The fight functions like a day battle, therefore no cut-in will occur. If you succeed in avoiding the ambush, your fleet will not go through the ambush node in the first place.
  • To avoid a Radar Ambush, you are required to bring a certain number of radars depending on the map. The game counts the number of ships with radars, not the total number of radars they have equipped.
    • EXAMPLE: E-1H Phase 2 requires 5 radars. If you have 6 ships, you must bring 5 radars on 5 different ships, not 5 radars on 2 ships.

Equipment treated as a "Surface Radar"[edit | edit source]

  • Despite the name "Surface Radar", certain Air Radars are also treated as a Surface Radar under the Branching Rules due to their View Range LOS Stat.
    • The Radar must have at least 5+ View Range LOS Stats to fall under the category.
Radars treated as a 'Surface Radar' by the Branching Rules

※Certain Air Radars are treated as a Surface Radar for Branching Rules due to their View Range LOS Stat.

※The Radar must have at least 5+ View Range LOS Stats to fall under the category.

Small Surface Radars
Type 22 Surface Radar 028 Card.pngType 22 Surface Radar 028 Card.png Type 33 Surface Radar 029 Card.pngType 33 Surface Radar 029 Card.png Type 22 Surface Radar Kai 4 088 Card.pngType 22 Surface Radar Kai 4 088 Card.png Type 22 Surface Radar Kai 4 (Calibrated Late Model) 240 Card.pngType 22 Surface Radar Kai 4 (Calibrated Late Model) 240 Card.png
Large Surface Radars
Type 32 Surface Radar 031 Card.pngType 32 Surface Radar 031 Card.png Type 32 Surface Radar Kai 141 Card.pngType 32 Surface Radar Kai 141 Card.png
Small Surface + Air Hybrid Radars
GFCS Mk.37 307 Card.pngGFCS Mk.37 307 Card.png SG Radar (Initial Model) 315 Card.pngSG Radar (Initial Model) 315 Card.png
Large Surface + Air Hybrid Radars
Type 21 Air Radar Kai 089 Card.pngType 21 Air Radar Kai 089 Card.png Type 42 Air Radar 032 Card.pngType 42 Air Radar 032 Card.png FuMO25 Radar 124 Card.pngFuMO25 Radar 124 Card.png SK Radar 278 Card.pngSK Radar 278 Card.png SK + SG Radar 279 Card.pngSK + SG Radar 279 Card.png
Battleship Surface + Air Hybrid Radars
15m Duplex Rangefinder + Type 21 Radar Kai Ni 142 Card.png15m Duplex Rangefinder + Type 21 Radar Kai Ni 142 Card.png

Difficulty Selection[edit | edit source]

Each map in this event has four (4) difficulty levels (a.k.a. operation ranks) the player can choose from:

EventMedal-Casual.png
EventMedal-Easy.png
EventMedal-Normal.png
EventMedal-Hard.png

The operation rank affects enemy patterns, boss health and strength, the number of times the player has to sink the boss in order to clear the map and the drop rates of ships. Different ranks reward different medals, pieces of equipment and/or materials upon clearing a map. The higher the operation rank, the better the reward.

However, new ship rewards are available on all difficulty levels, and you only have to clear the final event map on Hard to get the exclusive First-class medal.

Click that option circled in as shown in red to change difficulty

You can choose the difficulty level for each individual map separately. However, you will NOT be able to select Hard for a map if you cleared the previous map on Casual/Easy. You must clear the previous map at least on Medium/Normal.

  • NOT POSSIBLECasual/Easy > Hard
  • POSSIBLE(Medium/Normal)/Hard > Hard
  • POSSIBLECasual/Easy/(Medium/Normal)/Hard > (Medium/Normal)
  • POSSIBLECasual/Easy/(Medium/Normal)/Hard > Casual/Easy

Un-highlighted words indicate Current Difficulty

It is also possible to change the difficulty level afterwards, however:

  • If you drop to a lower difficulty (e.g. from Hard to Normal/Easy), the current HP/TP bar value (the one you have the moment you drop down) will increase by 25% of the new maximum and you will retain ALL unlocking/phases done on the previous difficulty level.
  • However, if you change to a higher difficulty (e.g. from Easy to Hard), the boss's HP/TP bar will be reset upon doing so and ALL unlocking/debuffs/phases will be reset as well. In short, you will lose your entire map progress!

Once the map is cleared (boss HP bar is depleted, boss is defeated, and the HP bar is no longer visible in the map):

  • You CAN NO LONGER re-adjust the difficulty level, but can still farm the map on the difficulty you have chosen to clear the map with.
  • The enemy patterns revert back to pre-final patterns.

New[edit | edit source]

Ships[edit | edit source]

Minegumo Banner.png DD Minegumo E-1 Reward
Nisshin Banner.png AV Nisshin E-3 Reward
Johnston Banner.png DD Johnston E-3 Drop
Hayanami Banner.png DD Hayanami E-2 Drop

Equipment[edit | edit source]

5inch Single Gun Mount Mk.30 Kai 313 Card.png 5inch Single Gun Mount Mk.30 Kai GreenGunDP.png Small Caliber Main Gun (High-angle) E-1 Hard Reward
Type 2 Land-based Reconnaissance Aircraft (Skilled) 312 Card.png Type 2 Land-based Reconnaissance Aircraft (Skilled) YellowPlane.png Land-based Reconnaissance Aircraft E-2 Medium/Hard Reward

Abyssal[edit | edit source]

Units[edit | edit source]

Abyssal Nimbus Princess Banner.png
Abyssal Nimbus Princess - Damaged Banner.png
Abyssal Nimbus Princess
  • 3 normal forms
  • 3 damaged forms
Abyssal Destroyer E-1 Boss
Abyssal Sun Princess Banner.png
Abyssal Sun Princess Damaged Banner.png
Abyssal Sun Princess
  • 3 normal forms
  • 3 damaged forms
Abyssal Seaplane Tender E-3 Boss
Destroyer Ni-Class Banner.png
Destroyer Ni-Class Late Model Banner.png
Destroyer Ni-Class Late Model Elite Banner.png
Destroyer Ni-Class Kai Late Model Flagship Banner.png
Destroyer Ni-Class
  • 1 new Kai form
  • 1 new Kai Late Model form
  • 1 new Kai Late Model Elite form
  • 1 new Kai Late Model Flagship form
Abyssal Destroyer Various encounters

Equipment[edit | edit source]

Abyssal 5inch Twin Gun Mount Model C RedGunLight.png Small Caliber Main Gun Abyssal Nimbus Princess equipment
Abyssal 5.5inch Twin Gun Mount Kai RedGunMedium.png Medium Caliber Main Gun Abyssal Sun Princess equipment
Abyssal Target Torpedo.png Midget Submarine Abyssal Sun Princess equipment
Abyssal 5inch Single Gun Mount Mk.30 GreenGunDP.png Small Caliber Main Gun Destroyer Ni-Class (Kai forms) equipment

Maps[edit | edit source]

Winter 2019 Event Lock.png
Winter 2019 Event E-1 Map.png Winter 2019 Event E-2 Map.png Winter 2019 Event E-3 Map.png
E-1 E-2 E-3
Grey Tag Green Tag and Blue Tag
Yellow Tag
Single Fleet Single Fleet
Combined Fleet
Single Fleet
Combined Fleet
TP + HP Gauge HP + HP Gauge TP + HP Gauge
LBAS LBAS
Click on image of each map to jump to respective subpage directly if you don't want to use tab
HP/TP Bar Scaling
The amount of HP (or TP) required to clear a map usually varies depending on an Admiral's HQ Level (this was first observed during Summer 2015 Event). The higher the HQ Level is, the more kills (or TP) may be required to complete a map.
Casual[Edit] E1 E2 E3
TP HP HP HP TP HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109
110 → 120 170 1600 1400 840 380 4000


Easy[Edit] E1 E2 E3
TP HP HP HP TP HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109 165 1550 1350 830 370
110 → 120 170 1600 1400 840 380 4000
Medium[Edit] E1 E2 E3
TP HP HP HP TP HP
40 → 49
50 → 59
60 → 69
70 → 79
80 → 89
90 → 99
100 → 109
110 → 120 180 1600 1400 840 380 4000
Hard[Edit] E1 E2 E3
TP HP HP HP TP HP
80 → 89
90 → 99
100 → 109 830
110 → 120 200 1600 1400 840 380 4000

Quick Notes[edit | edit source]

Event Drops[edit | edit source]

[Edit] Press [Expand] to see the table, or [Edit] to edit it

☑ Showing old data ☒ Show old data (hidden)

Legend: R = Reward, D = Drop, Empty = not implemented yet/not yet know, N = not found (after implement)
Exclusive Ships
2014
2015 Events 2016 Events 2017 Events 2018 Events 2019 Events 2020 Events
Portrait
Name
Akizuki
Akizuki
R N N N D D D D D N D D D D N N D N D N D N
Prinz Eugen
Prinz Eugen
R N N N D D N D D N N D N N D N N N N N N D
U-511
U-511
R D D D N D N N D N D N N N N N D N N D D
Amagi
Amagi
R N N N D D D D N D D N N N N N N D N N N
Katsuragi
Katsuragi
R N N N N D N N N N D D N N D N N N N N
Littorio
Littorio
R N N N D N N N D D N N D N N D N N N D
Roma
Roma
D D D N D N N N D D N N D N N D N N N N
Teruzuki
Teruzuki
R N N D N N D N D D N N D D N D N D N
Graf Zeppelin
Graf Zeppelin
D D D N N N N D N D D N N N N N D D
Hatsuzuki
Hatsuzuki
R N N D N N N N N D N N N D N D D
Iowa
Iowa
R N N N N N N D N N D N N N N N
Pola
Pola
R N D N N D N N D N N D N N N N
Harukaze
Harukaze
D N D D D D D D N N N N D N N D
Aquila
Aquila
D N N N D N N D N N D N N N D
I-26
I-26
D N D N N N N D N N D D N D N
Commandant Teste
Commandant Teste
R N N D N N D N D D N N N D
Matsukaze
Matsukaze
R N N N D D N N N D N D D
I-14
I-14
R N N N N D N N N N N D N
I-13
I-13
D D N N N D N N N D N D N
Kasuga Maru
Kasuga Maru
R N D D D D D N D N D D
Gangut
Gangut
R N N D N N D N N N D D
Shimushu
Shimushu
D N D D D D D N N N D D
Kunashiri
Kunashiri
D N D D D D D N D N D N
Etorofu
Etorofu
D D D D D D D D D D D N
Hatakaze
Hatakaze
R N D N N N N D N D D
Richelieu
Richelieu
R N D D N N D N D N D
Luigi Torelli
Luigi Torelli
D N D D N D D N N D D
Matsuwa
Matsuwa
D D D D N D N D D D D
Suzutsuki
Suzutsuki
R N N D D N N N D N
Sado
Sado
R D D N D D D D D D
Tsushima
Tsushima
D D D D D D D D D D
I-400
I-400
D N D N D N N N D N
Gambier Bay
Gambier Bay
R N N D N N D D D
Intrepid
Intrepid
R N N D N N N N N
Hiburi
Hiburi
R D D D D D N D D
Daitou
Daitou
D D D D D D N D D
Jervis
Jervis
D N N N D N N N D
Hamanami
Hamanami
D N D D D D D D D
Tashkent
Tashkent
D N N D D N N D D
Samuel B. Roberts
Samuel B. Roberts[EDT 1]
N N D N N D N N
Fukae
Fukae[EDT 2]
D D D D D D D N
Shinyou
Shinyou
R N D D D N D D
Maestrale
Maestrale
R N N D N N N N
Nelson
Nelson
R N N D N N N D
Gotland
Gotland
D D D D N D N D
Minegumo
Minegumo
R N D D D D N
Nisshin
Nisshin
R N N N N D N
Hayanami
Hayanami
D D D D D D D
Johnston
Johnston
D D D N N D N
Giuseppe Garibaldi
Giuseppe Garibaldi
R N N N N D
Colorado
Colorado
R N N N N D
Hachijou
Hachijou
R N D N D N
Ishigaki
Ishigaki
D N D N D N
Fletcher
Fletcher
D N D N D N
Duca degli Abruzzi
Duca degli Abruzzi
R N N N N
Janus
Janus
R N N N D
Mikura
Mikura
D D N D N
Grecale
Grecale
D N N N D
Perth
Perth
R N D D
Shinshuu Maru
Shinshuu Maru
R N N D
Atlanta
Atlanta
R N N N
De Ruyter
De Ruyter
D N D N
Houston
Houston
D N D N
Hirato
Hirato
D D D N
Akishimo
Akishimo
D N D N
Usugumo
Usugumo
R N
I-47
I-47
R N
Matsu
Matsu
R N
South Dakota
South Dakota
R N
Hornet
Hornet
R N
Jingei
Jingei
D D
Kaiboukan No.4
Kaiboukan No.4
D D
Ariake
Ariake
D N
Helena
Helena
D N
Yashiro
Yashiro
D N
Washington
Washington
R
Take
Take
R
Scirocco
Scirocco
D
Sheffield
Sheffield
D
Portrait
Name
Exclusive Ships
2014
2015 Events 2016 Events 2017 Events 2018 Events 2019 Events 2020 Events
This table includes all ships that are currently unavailable outside of events.
  1. Samuel B. Roberts introduced as a quest reward from 5A05 during the Kancolle 5th Anniversary
  2. Fukae introduced as drop in (Phase 1) 2-4 & 6-3 during Spring 2018 Mini-Event
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