Ootomari

Info

大泊 (おおとまり)		Ootomari
595
Ootomari Class Fleet Oiler

HP	20→24	FP	2→8
ARM	11→31	TORP	0
EVA	??→??	AA	6→18
PLA	0	ASW	??→??
SPD	Slow	LOS	??→??
RGE	Short	LUK	40→80

Aircraft	Equipment
0	7.7mm Machine Gun
0	7.7mm Machine Gun
	-Locked-
	-Locked-

Modernization	0 0 0 2
Build Time	0:00 (Unbuildable)	Remodel Req
Consumption	15 5	Dismantle	2 0 6 0
Illustrator	Unknown	Seiyuu	Unknown

大泊改 (おおとまりかい)		Ootomari Kai
600
Ootomari Class Fleet Oiler

HP	22→26	FP	3→17
ARM	12→36	TORP	0
EVA	??→??	AA	9→22
PLA	0	ASW	??→??
SPD	Slow	LOS	??→??
RGE	Short	LUK	50→96

Aircraft	Equipment
0	?
0	?
	-Locked-
	-Locked-

Modernization	0 0 0 2
Remodel Level	55	Remodel Req	130 330
Consumption	15 10	Dismantle	2 0 7 0
Illustrator	Unknown	Seiyuu	Unknown

Is a "Fleet Oiler" (AO), despite being designated in the game as an "Ice Breaker" (AGB / 砕氷 / 砕氷艦) and being historically one.

This is reflected in her equipability exceptions.

Gameplay Notes

Fleet Oilers (AO) can notably refuel ships mid-sortie using Underway Replenishment.

They can also carry Landing Craft, which is useful for Resource Farming.

Special Mechanics

Example of Underway Replenishment translated.

Underway Replenishments are consumable items that are used to restore fuel and ammo mid-sortie when consumed.

As "consumables", they do not take any equipment slot and appear in the Inventory.
Only Fleet Oilers (AO) and Kumano Maru can carry them, including in their RE.

When entering a boss node, a prompt will appear giving a choice to use the Underway Replenishment(s) or not.

The cost of the resupply will be deducted from the stockpile.
The resupply cannot be activated when having insufficient fuel or ammo.
The amount of fuel and ammo resupplied depends on
- The fleet type (single or combined)
- How many Resupplies are carried.

The resupply rates are as follow:

Used	Single Fleet	Combined Fleet
1	25 %	15 %
2	36 %	27.5 %
3	47 %	40 %

This mechanic should only be used to avoid Fuel penalty or/and Ammo penalty.

Stats Exceptions

Equipability Exceptions

AO	ExpandDefault equipment compatibility
	✔️ Can Equip	❌ Cannot Equip
		Sp Recon Bomber
	Small Small Large	Sp Sp_Sec Sub Minisub Large Sp
	Medium Small	Large Large
	RE: Medium
	Notes: = ; = ; = ; = ; =Recon ; =Bomber ; Small= ; Medium= ; Sec= ; =

Ootomari Equipability Exceptions
	Ootomari	Ootomari Kai
Expansion Slot Exceptions	Can Equip: ★+7
Expansion Slot Exceptions	Cannot Equip:	-
Ship Exceptions	Can Equip:	Can Equip:
	Cannot Equip: Large	Cannot Equip:
	Medium Can Only Equip:

Fit Bonuses

Expand[edit]Ootomari Equipment Bonuses
Equipment	Extra Requirement						Note
Ship-Type Bonuses
12.7cm Twin Gun Mount Model C Kai 3 H	+ Air Radar		+2			+2	One-time
	(2nd equipped) + Air Radar		+2				One-time
	(3rd equipped) + Air Radar		+2				One-time
12cm Single High-angle Gun Mount Model E Kai	(★2-3)		+1
	(★4-5)		+1			+2
	(★6-7)	+1	+1			+2
	(★8-9)	+1	+2			+2
	(★MAX)	+1	+2		+1	+2
12cm Single High-angle Gun Mount + 25mm Machine Guns Additions	(★0)	+1	+2		+1	+2
	(★1)	+1	+2		+1	+3
	(★2-3)	+1	+2		+1	+4
	(★4-5)	+1	+3		+1	+4
	(★6)	+1	+3		+1	+5
	(★7)	+1	+3		+2	+5
	(★8)	+1	+4		+2	+5
	(★9)	+1	+4		+2	+6
	(★MAX)	+2	+4		+2	+6
	+ Air Radar		+2			+2	One-time
Passive Radiolocator (E27) + Type 22 Surface Radar Kai 4 (Calibrated Late Model)	(1st equipped) (★7)				+1		One-time
	(1st equipped) (★8)				+1	+1	One-time
	(1st equipped) (★9)	+1			+1	+1	One-time
	(1st equipped) (★MAX)	+1			+2	+1	One-time
	+ ★3+ 12.7cm Twin Gun Mount Model D Kai 2 OR ★3+ 12.7cm Twin Gun Mount Model D Kai 3	+1			+1		One-time
	+ ★4+ Type 13 Air Radar Kai (Late Model)	+1	+4		+1	+3	One-time
Type 2 Depth Charge	(★8-9)			+1
Type 2 Depth Charge	(★MAX)			+2
2cm Flakvierling 38	(★4-6)		+1			+1
	(★7-9)	+1	+2			+1
	(★MAX)	+1	+3			+2
	(★4-MAX) + Air Radar		+1				One-time
3.7cm FlaK M42	(★6-7)		+1			+1
	(★8-9)	+1	+1			+1
	(★MAX)	+1	+1		+1	+2
	(★6-MAX) + Air Radar		+2				One-time
Arctic Camouflage (+ Arctic Equipment)	(★7)					+1
	(★8)				+1	+1
	(★9)	+1			+1	+1
	(★MAX)	+1			+1	+2
Fleet Communication Antenna	(★4)				+1
	(★5)	+1			+1
	(★6)	+1			+1	+1
	(★7)	+1			+2	+1
	(★8)	+2			+2	+1
	(★9)	+2			+2	+2
	(★MAX)	+2			+3	+2

Important Information

Drop Locations

Ship	Rarity	Type	No.	World 1						World 2					World 3					World 7					World 4					World 5					World 6					Remarks
Ship	Rarity	Type	No.	1	2	3	4	5	6	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	Remarks
Ootomari	Very Rare	AO	595																																					Unbuildable

Voice Lines

CG

ExpandRegular
Base Base Damaged Kai Kai Damaged

Trivia

General Information

She is named after the Port of Ootomari.
She was launched on the 3rd of October 1921.
Originally designed as a Kamoi-class Oiler. The failure of Japan to dispatch ships capable of breaking through the ice to rescue their citizens during the Nikolayevsk Incident caused her redesign as an Ice Breaker.
Japan had no prior experience in constructing ice breakers, as such they relied on observing designs from other nations, particularly the Soviet Union, and ultimately she was based after the Dobrynya Nikitich.

Update History

She was added on the 7th of March 2025 as Spring 2025 Event E1 drop.

Misc

Was assigned to the Ōminato Guard District and took northern patrol duties in the regions of Sakhalin, Kuril Islands and Sea of Okhotsk
Survived World War II.
Was initially planned to be a repatriation ship, but her boilers were no longer usable; in fact, she was heading for Youkosuka for maintenance, but the war ended and plans were stopped.