Early Spring 2023 Event/E-4

Time remaining until Event ends [1]: 1 May 2023 11:00:00 +0900 The Early Spring 2023 Event has ended!
KC anniversary maintenance has started, time remaining until maintenance ends [2]: (~4h event pause) 23 April 2023 20:30:00 +0900 The maintenance has ended. See 2023-04-23 patch notes.
Early Spring 2023 Event Hub Overview Introduction & Overview Main Operation Maps Extra Operation Maps E-1 | E-2 | E-3 E-4 | E-5 | E-6

I-Go Transport Operation
伊号輸送作戦

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Information
Event Tag	Yokosuka Defence Squadron Operation I-go Fleet
Boss Gauges	Hard (甲): 800 TP +? HP
	Medium (乙): ? TP + ? HP
	Easy (丙): ? TP + ? HP
	Casual (丁): ? TP + ? HP
Map Bosses	Light Carrier Nu-Class B FlagshipLight Carrier Nu-Class B Flagship
	Seaplane Tender Princess

Rewards[edit]
Choice	丁 Casual	丙 Easy	乙 Medium	甲 Hard
Shipborne Model Type 4 20cm Anti-ground Rocket Launcher	1	1	2	3
OR
Ammo	1000	2000	3000	4000

Reward	丁 Casual	丙 Easy	乙 Medium	甲 Hard
Food Supply Ship Irako	1	1	2	3
Food Supply Ship Mamiya	1	1	2	3
Emergency Repair Goddess		1	2	3
New Model Aerial Armament Material			1	2
Type 1 Land-based Attack Aircraft (Hachiman Force)		1	1 (★2)	1 (★4)
Toku Daihatsu Landing Craft + Chi-Ha				1
Zero Fighter Model 52C (Hachiman Force)				1

Rewards
All
Equipment/Item	丁 Casual	丙 Easy	乙 Medium	甲 Hard

The event guides are to be constructed through the respective Event map page guide sandbox and reviewed by editors before being approved here.

• Do not update the guides through this page unless it is a minor fix. Please only update guides through their respective sandbox pages.

Branching Table

E-4 Branching Rules
Nodes		Rules

Branching compositions were reported over the course of the event. (NGA and KCNav)

Historical Bonuses

DISCLAIMER: This information is based on user-submitted data and is subject to revisions as more data is gathered. Any version of the ship receives the bonus regardless of remodel.

Ship Bonuses

Ships			DamageClass bonuses stack with named ships	Acc/EvaDoes not stack
			Mapwide	Acc	Eva
All DE			1.15x	-	-
All DD			1.04x	1.02x	1.1x
All CL, CLT			1.03x	1.04x	1.04x
All CA, CAV			1.02x
			1.07x1.03 x DD Bonus	?	?
			1.12x1.08 x DD Bonus	?	?
			1.13x	1.2x
			1.16x1.13 x CL(T) Bonus
			1.175x1.13 x DD Bonus
		-
			1.3x1.13 x DE Bonus

Notes

• Damage bonuses given by types stack with named ships.
• Accuracy or Evasion bonuses given by types do not stack with named ships.
• Evasion bonus is only roughly checked as it is hard to estimate. The info will be updated if an inconsistency is found (@Divinity_123).

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Map overview

Soon™

Enemy Compositions

Type	Ships
DE

Type	Ships
DE
DD
SS
AV
AO

Type	Ships
DE

Type	Ships
DE

Type	Ships
DE
DD
SS
AV

E-4 Hard AB

#	Formation	Air Raids	AD/AP AS/AS+
AB	Diamond		97/194 435/870
	Diamond		103/205 461/921
	Diamond		107/214 480/960
#	Formation	Air Raids	AD/AP AS/AS+

E-4 Hard A

#	Selection Node
A	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Hard B: 深海潜水艦隊 前衛哨戒 B群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
B	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Hard C: 深海潜水艦隊 前衛哨戒 C群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
C	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Hard D: 深海潜水艦隊 前衛哨戒 D群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
D	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Hard E: 深海潜水艦隊・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
E	Echelon Line Abreast Phases: 1, 2		46/91 204/408
	Echelon Line Abreast Phases: 1		50/100 224/447
	Echelon Line Abreast Phases: 1		57/113 252/504
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Hard F: 前衛哨戒 A群・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
F	Echelon Line Abreast Phases: 1		46/91 204/408
	Echelon Line Abreast Phases: 1, 2		50/100 224/447
	Echelon Line Abreast Phases: 1, 2		57/113 252/504
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Hard G

#	Selection Node
G	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Hard H: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
H	Diamond Phases: 1, 2		57/113 252/504
	Diamond Phases: 1, 2		97/193 432/864
	Diamond Phases: 1, 2		102/203 456/912
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Hard I: 深海任務部隊 前衛ピケットA線 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
I	Line Ahead Echelon Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Hard J: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
J	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1		57/113 252/504
	Diamond Phases: 1		97/193 432/864
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Hard K: 深海任務部隊 前衛巡洋艦戦隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
K	Line Ahead Double Line Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Hard L: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
L	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1		57/113 252/504
	Diamond Phases: 1		97/193 432/864
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Hard M

#	Landing Node
M	輸送物資の揚陸地点に到達しました。本海域の輸送作戦は無事完了しています。 The landing point of the convoy has been reached. The transport operation here has already been completed successfully.
#	Landing Node

E-4 Hard N

#	Empty Node
N	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Hard O: 深海任務部隊 父島強襲機動部隊 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
O	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1 (Final)		57/113 252/504
#	Formation	Boss Battle Node	AD/AP AS/AS+

E-4 Hard P: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
P	Diamond Phases: 2		57/113 252/504
	Diamond Phases: 2		97/193 432/864
	Diamond Phases: 2		102/203 456/912
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Hard Q: 深海任務部隊 房総強襲機動部隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
Q	Diamond Phases: 2		57/113 252/504
	Diamond Phases: 2		57/113 252/504
	Diamond Phases: 2		102/203 456/912
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Hard R

#	Empty Node
R	気のせいだった。 Must be my imagination.
#	Empty Node

E-4 Hard S: 深海任務部隊 機動部隊前衛随伴 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
S	Line Ahead Echelon Phases: 2		0/0 0/0
	Line Ahead Phases: 2		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Hard U

#	Empty Node
U	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Hard V: 深海任務部隊 小笠原強襲艦隊群 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
V	Cruising Formation 3 Phases: 2		120/239 536/1071
	Cruising Formation 3 Phases: 2 (Final)		131/262 588/1176
#	Formation	Boss Battle Node	AD/AP AS/AS+

Type	Ships
DE
DD
AV
AO

Type	Ships
DE

Type	Ships
DE
DD
SS
AV

E-4 Medium AB

#	Formation	Air Raids	AD/AP AS/AS+
AB	Diamond		47/93 209/417
	Diamond		91/182 408/816
	Diamond		97/193 432/864
#	Formation	Air Raids	AD/AP AS/AS+

E-4 Medium A

#	Selection Node
A	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Medium B: 深海潜水艦隊 前衛哨戒 B群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
B	Echelon Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Medium C: 深海潜水艦隊 前衛哨戒 C群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
C	Echelon		0/0 0/0
	Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Medium D: 深海潜水艦隊 前衛哨戒 D群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
D	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Medium E: 深海潜水艦隊・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
E	Echelon Line Abreast Phases: 1		41/81 180/360
	Echelon Line Abreast Phases: 1		46/91 204/408
	Echelon Line Abreast Phases: 1		46/91 204/408
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Medium F: 前衛哨戒 A群・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
F	Echelon Phases: 1		46/91 204/408
	Echelon Phases: 1		41/81 180/360
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Medium G

#	Selection Node
G	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Medium H: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
H	Diamond Phases: 1, 2		46/91 204/408
	Diamond Phases: 1, 2		90/180 404/807
	Diamond Phases: 2		96/191 428/855
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Medium I: 深海任務部隊 前衛ピケットA線 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
I	Line Ahead Echelon Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Medium J: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
J	Diamond Phases: 1		46/91 204/408
	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1		90/180 404/807
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Medium K: 深海任務部隊 前衛巡洋艦戦隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
K	Line Ahead Double Line Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Medium L: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
L	Diamond Phases: 1		46/91 204/408
	Diamond Phases: 1		50/100 224/447
	Diamond Phases: 1		90/180 404/807
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Medium M

#	Landing Node
M	輸送物資の揚陸地点に到達しました。本海域の輸送作戦は無事完了しています。 The landing point of the convoy has been reached. The transport operation here has already been completed successfully.
#	Landing Node

E-4 Medium N

#	Empty Node
N	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Medium O: 深海任務部隊 父島強襲機動部隊 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
O	Diamond Phases: 1		46/91 204/408
	Diamond Phases: 1		46/91 204/408
	Diamond Phases: 1 (Final)		50/100 224/447
#	Formation	Boss Battle Node	AD/AP AS/AS+

E-4 Medium P: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
P	Diamond Phases: 2		46/91 204/408
	Diamond Phases: 2		90/180 404/807
	Diamond Phases: 2		96/191 428/855
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Medium Q: 深海任務部隊 房総強襲機動部隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
Q	Diamond		46/91 204/408
	Diamond		50/100 224/447
	Diamond		90/180 404/807
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Medium R

#	Empty Node
R	気のせいだった。 Must be my imagination.
#	Empty Node

E-4 Medium S: 深海任務部隊 機動部隊前衛随伴 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
S	Line Ahead Echelon Phases: 2		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Medium U

#	Empty Node
U	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Medium V: 深海任務部隊 小笠原強襲艦隊群 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
V	Cruising Formation 3 Phases: 2		70/139 312/624
	Cruising Formation 3 Phases: 2 (Final)		74/148 332/663
#	Formation	Boss Battle Node	AD/AP AS/AS+

Type	Ships
DE
DD
AV
AO

Type	Ships
DE

Type	Ships
DE
DD
SS
AV

E-4 Easy AB

#	Formation	Air Raids	AD/AP AS/AS+
AB	Diamond		41/82 183/366
	Diamond		87/173 387/774
	Diamond		92/183 411/822
#	Formation	Air Raids	AD/AP AS/AS+

E-4 Easy A

#	Selection Node
A	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Easy B: 深海潜水艦隊 前衛哨戒 B群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
B	Echelon Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Easy C: 深海潜水艦隊 前衛哨戒 C群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
C	Echelon Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Easy D: 深海潜水艦隊 前衛哨戒 D群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
D	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Easy E: 深海潜水艦隊・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
E	Line Abreast		41/81 180/360
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Easy F: 前衛哨戒 A群・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
F	Echelon Line Abreast		3/6 12/24
	Echelon Line Abreast Phases: 1		41/81 180/360
	Echelon Line Abreast Phases: 2		46/91 204/408
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Easy G

#	Selection Node
G	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Easy H: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
H	Diamond Phases: 1, 2		41/81 180/360
	Diamond Phases: 1, 2		86/171 384/768
	Diamond Phases: 1, 2		91/182 408/816
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Easy I: 深海任務部隊 前衛ピケットA線 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
I	Line Ahead Echelon Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Easy J: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
J	Diamond Phases: 1		9/17 36/72
	Diamond Phases: 1		41/81 180/360
	Diamond Phases: 1		86/171 384/768
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Easy K: 深海任務部隊 前衛巡洋艦戦隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
K	Line Ahead Double Line Phases: 1		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Easy L: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
L	Diamond Phases: 1		9/17 36/72
	Diamond Phases: 1		41/81 180/360
	Diamond Phases: 1		86/171 384/768
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Easy M

#	Landing Node
M	輸送物資の揚陸地点に到達しました。本海域の輸送作戦は無事完了しています。 The landing point of the convoy has been reached. The transport operation here has already been completed successfully.
#	Landing Node

E-4 Easy N

#	Empty Node
N	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Easy O: 深海任務部隊 父島強襲機動部隊 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
O	Diamond Phases: 1		41/81 180/360
	Diamond Phases: 1		41/81 180/360
	Diamond Phases: 1 (Final)		46/91 204/408
#	Formation	Boss Battle Node	AD/AP AS/AS+

E-4 Easy P: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
P	Diamond Phases: 2		41/81 180/360
	Diamond Phases: 2		86/171 384/768
	Diamond Phases: 2		91/182 408/816
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Easy Q: 深海任務部隊 房総強襲機動部隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
Q	Diamond Phases: 2		41/81 180/360
	Diamond Phases: 2		46/91 204/408
	Diamond Phases: 2		86/171 384/768
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Easy R

#	Empty Node
R	気のせいだった。 Must be my imagination.
#	Empty Node

E-4 Easy S: 深海任務部隊 機動部隊前衛随伴 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
S	Line Ahead Echelon Phases: 2		0/0 0/0
	Line Ahead Phases: 2		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Easy U

#	Empty Node
U	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Easy V: 深海任務部隊 小笠原強襲艦隊群 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
V	Cruising Formation 3 Phases: 2		48/95 213/426
	Cruising Formation 3 Phases: 2 (Final)		53/106 237/474
#	Formation	Boss Battle Node	AD/AP AS/AS+

Type	Ships
DE
DD

Type	Ships
DE

Type	Ships
DE
DD
SS
AV

E-4 Casual AB

#	Formation	Air Raids	AD/AP AS/AS+
AB	Diamond		9/18 39/78
	Diamond		41/82 183/366
	Diamond		44/87 194/387
#	Formation	Air Raids	AD/AP AS/AS+

E-4 Casual A

#	Selection Node
A	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Casual B: 深海潜水艦隊 前衛哨戒 B群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
B	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Casual C: 深海潜水艦隊 前衛哨戒 C群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
C	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 1, 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Casual D: 深海潜水艦隊 前衛哨戒 D群 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
D	Echelon Line Abreast Phases: 1, 2		0/0 0/0
	Echelon Line Abreast Phases: 2		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Casual E (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Casual F: 前衛哨戒 A群・深海航空支援 (PoiDB)

#	Formation	Supported Battle Node	AD/AP AS/AS+
F	Line Abreast		3/6 12/24
	Echelon Phases: 1		41/81 180/360
#	Formation	Supported Battle Node	AD/AP AS/AS+

E-4 Casual G

#	Selection Node
G	艦隊の針路を選択できます。提督、どちらの針路をとられますか？ You can decide the fleet's course. Admiral, which heading should we take?
#	Selection Node

E-4 Casual H: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
H	Diamond Phases: 1, 2		9/17 36/72
	Diamond Phases: 1, 2		41/81 180/360
	Diamond Phases: 2		43/86 192/384
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Casual I: 深海任務部隊 前衛ピケットA線 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
I	Line Ahead Echelon Phases: 1, 2		0/0 0/0
	Line Ahead Phases: 1, 2		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Casual J: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
J	Diamond Phases: 1, 2		9/17 36/72
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Casual K: 深海任務部隊 前衛巡洋艦戦隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
K	Line Ahead Double Line Phases: 1, 2		0/0 0/0
	Line Ahead Phases: 1		0/0 0/0
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Casual L: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
L	Diamond Phases: 1		3/6 12/24
	Diamond Phases: 1, 2		9/17 36/72
	Diamond Phases: 1		41/81 180/360
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Casual M

#	Landing Node
M	輸送物資の揚陸地点に到達しました。本海域の輸送作戦は無事完了しています。 The landing point of the convoy has been reached. The transport operation here has already been completed successfully.
#	Landing Node

E-4 Casual N

#	Empty Node
N	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Casual O: 深海任務部隊 父島強襲機動部隊 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
O	Diamond Phases: 1, 2		3/6 12/24
	Diamond Phases: 1		9/17 36/72
	Diamond Phases: 1 (Final)		41/81 180/360
#	Formation	Boss Battle Node	AD/AP AS/AS+

E-4 Casual P: 深海空母機動部隊 艦載機群 (PoiDB)

#	Formation	Air Defense Node	AD/AP AS/AS+
P	Diamond Phases: 2		9/17 36/72
	Diamond Phases: 2		41/81 180/360
	Diamond Phases: 2		43/86 192/384
#	Formation	Air Defense Node	AD/AP AS/AS+

E-4 Casual Q: 深海任務部隊 房総強襲機動部隊 (PoiDB)

#	Formation	Normal Battle Node	AD/AP AS/AS+
Q	Diamond		3/6 12/24
	Diamond Phases: 2		9/17 36/72
	Diamond		41/81 180/360
#	Formation	Normal Battle Node	AD/AP AS/AS+

E-4 Casual R

#	Empty Node
R	気のせいだった。 Must be my imagination.
#	Empty Node

E-4 Casual S: 深海任務部隊 機動部隊前衛随伴 (PoiDB)

#	Formation	Night Battle Node	AD/AP AS/AS+
S	Line Ahead Echelon Phases: 2		0/0 0/0
	Line Ahead Phases: 2		0/0 0/0
#	Formation	Night Battle Node	AD/AP AS/AS+

E-4 Casual U

#	Empty Node
U	敵影を見ず。 No enemy spotted.
#	Empty Node

E-4 Casual V: 深海任務部隊 小笠原強襲艦隊群 (PoiDB)

#	Formation	Boss Battle Node	AD/AP AS/AS+
V	Cruising Formation 3 Phases: 2		11/21 45/90
	Cruising Formation 3 Phases: 2 (Final)		48/95 213/426
#	Formation	Boss Battle Node	AD/AP AS/AS+

Ship Drops

Ship drops
Type	Ship?	K	O	S	V
DE	Noumi		Easy+		Easy+
DE	Mikura		Easy+	Casual+
DE	Yashiro	Hard+	Casual+	Casual+
DE	Kaiboukan No.4				Casual+
DE	Kaiboukan No.30				Casual+
DD	Fuyutsuki				Easy+
DD	Hatakaze		Easy+		Casual+
DD	Yamakaze		Easy+
DD	Asagumo				Casual+
DD	Nowaki		Casual+		Casual+
DD	Kazagumo				Casual+
DD	Matsu		Easy+		Casual+
DD	Momo				Easy+
DD	Johnston		Hard+		Easy+
SS	Scamp		Hard+		Casual+
AV	Mizuho		Easy+		Casual+
AO	Souya		Easy+
DD	Yamagumo				Casual+
DD	Yuugumo				Casual+
DD	Naganami				Casual+
CL	Kitakami		Casual+	Casual+	Casual+
CL	Ooi		Easy+	Casual+	Casual+
CL	Nagara		Easy+		Casual+
CL	Sendai		Casual+	Casual+
CA	Kinugasa				Casual+
CA	Tone		Casual+	Casual+	Casual+
CA	Chikuma		Easy+	Casual+	Casual+
CVL	Shouhou		Easy+	Hard+
CVL	Junyou				Medium+
FBB	Kongou				Casual+
FBB	Hiei				Casual+
FBB	Haruna				Casual+
FBB	Kirishima				Casual+
BB	Fusou		Casual+	Hard+
BB	Yamashiro		Easy+	Easy+
BB	Ise				Casual+
BB	Hyuuga				Casual+
BB	Nagato		Easy+		Casual+
BB	Mutsu				Casual+
CV	Souryuu				Casual+
CV	Hiryuu				Casual+

Time remaining until Event ends [7]: 1 May 2023 11:00:00 +0900 The Early Spring 2023 Event has ended!
KC anniversary maintenance has started, time remaining until maintenance ends [8]: (~4h event pause) 23 April 2023 20:30:00 +0900 The maintenance has ended. See 2023-04-23 patch notes.
Early Spring 2023 Event Hub Overview Introduction & Overview Main Operation Maps Extra Operation Maps E-1 | E-2 | E-3 E-4 | E-5 | E-6