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Iwami B

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Iwami B
Battleship | Japan | Tier IX
Tech Tree Position
Purchase priceSpecial Doubloons
Hit Points80,700 
Main Battery
410 mm/50 10th Year Type Mod.A in a twin turret4 х 2 pcs.
Rate of Fire2.14 shots/min.
Reload Time28 sec.
Rotation Speed5.14 deg./sec.
180 Degree Turn Time35.02 sec.
Firing Range22.3 km.
Maximum Dispersion244 m.
HE Shell410 mm HE Type 01 
Maximum HE Shell Damage6,500 
Chance of Fire on Target Caused by HE Shell30 %
Initial HE Shell Velocity834 m./s.
HE Shell Weight1016 kg.
AP Shell410 mm AP/APC Type 01 
Maximum AP Shell Damage12,750 
Initial AP Shell Velocity834 m./s.
AP Shell Weight1020 kg.
Secondary Armament #1
155 mm/60 3rd Year Type in a triple turret3 х 3 pcs.
Firing Range6.95 km.
Rate of Fireshots/min.
Reload Time12 sec.
HE Shell155 mm HE Type0 
Maximum HE Shell Damage2,600 
Initial HE Shell Velocity925 m./s.
Chance of Fire on Target Caused by HE Shell10 %
Secondary Armament #2
100 mm/65 Type 98 on a Model A mount8 х 2 pcs.
Firing Range6.95 km.
Rate of Fire20 shots/min.
Reload Timesec.
HE Shell100 mm HE Type98 
Maximum HE Shell Damage1,700 
Initial HE Shell Velocity1000 m./s.
Chance of Fire on Target Caused by HE Shell%
Torpedo Tubes
610 mm Quad2 х 4 pcs.
Rate of Fire0.4 shots/min.
Reload Time150 sec.
Rotation Speed25 deg./sec.
180 Degree Turn Time7.2 sec.
Maximum Damage20,967 
Torpedo Speed62 knot
Torpedo Range20.01 km.
AA Defense
100 mm/65 Type 98 on a Model A mount8 х 2 pcs.
. . . Average Damage per Second166.4 
. . . Firing Range5.01 km.
25 mm/60 Type 96 on a twin mount24 х 2 pcs.
. . . Average Damage per Second64.8 
. . . Firing Range2.49 km.
25 mm/60 Type 96 on a single mount18 х 1 pcs.
. . . Average Damage per Second32.4 
. . . Firing Range2.49 km.
25 mm/60 Type 96 on a triple mount12 х 3 pcs.
. . . Average Damage per Second39.6 
. . . Firing Range2.49 km.
Maximum Speed28.2 knot
Turning Circle Radius880 m.
Rudder Shift Time14.1 sec.
Surface Detectability Range15.89 km.
Air Detectability Range12.19 km.
Battle Levels

Iwami B — Japanese special premium Tier IX battleship.

One of the battleship projects developed in Japan in the mid-1930s. The ship was supposed to have four twin-gun main battery turrets. She had reinforced 100 mm dual-purpose artillery, improved anti-aircraft armament, and torpedo launchers.

Iwami B was first released for sale on 3 November 2023.


Main Battery Guns Rate of Fire
180° Turn Time
Maximum Dispersion
Maximum HE Shell Damage
Chance of Fire on Target Caused by HE Shell
Maximum AP Shell Damage
Research price
Purchase price
410 mm/50 10th Year Type Mod.A in a twin turret2.1352446,5003012,750 00
Hull Hit Points
Main Turrets
Secondary Gun Turrets
AA Mounts
Torpedo Tubes
Hangar Capacity
Research price
Purchase price
Iwami B.80,7001950848/318/24/12/82 00
Torpedoes Rate of Fire
Torpedo Tubes Reload Time
180° Turn Time
Maximum Damage
Torpedo Speed
Torpedo Range
Research price
Purchase price
Type90 mod. 10.41507.220,9666220 00
Maximum Firing Range
Research price
Purchase price
Type9 mod. 10 00
Engine Maximum Speed
Research price
Purchase price
Propulsion: 145,000 hp28.2 00

Compatible Upgrades

 Slot 1 
Main Armaments Modification 1
Auxiliary Armaments Modification 1
Magazine Modification 1
Damage Control Party Modification 1
 Slot 2 
Damage Control System Modification 1
Engine Room Protection
 Slot 3 
Main Battery Modification 2
Secondary Battery Modification 1
AA Guns Modification 1
Aiming Systems Modification 1
Torpedo Tubes Modification 1
 Slot 4 
Damage Control System Modification 2
Propulsion Modification 1
Steering Gears Modification 1
Airstrike Modification 1
 Slot 5 
Torpedo Lookout System
Concealment System Modification 1
Ship Consumables Modification 1
 Slot 6 
Main Battery Modification 3
Torpedo Tubes Modification 2
Gun Fire Control System Modification 2
Auxiliary Armaments Modification 2

Player Opinion


Warning. The data presented in the AA Defense sidebar section may be incorrect.
Refer to the in-game Port screens for more useful data.

Iwami B, or Iwami Black, is a clone of Iwami with an attractive black skin.

Iwami B is a premium Japanese Tier IX battleship armed with eight 410 mm guns. Her decent accuracy and good range complement the traditional sniper play style of Japanese battleships.


Iwami B carries eight 410 mm guns in four dual turrets. They have a range of 22.3 km, but does not have a spotter plane to increase the range further..

She fires the same shells found on Hizen, with decent alpha damage, good velocity, and good penetration. Her AP shells can overmatch 27mm armor, meaning her shells will be able to penetrate the bow/stern of Tier IX cruisers.. Her HE shells have 30% fire chance and 68 mm of penetration. Because of the overmatch on her 410 mm guns, good reload and accuracy, players should mainly fire AP at cruisers and capital ships while switching to HE for angled targets.

Iwami B’s guns have good dispersion and a great sigma value at 2.1, meaning her shells will generally have tight groupings. However, due to having only 8 guns, her accuracy can be frustrating due to the low amount of shells per salvo. This can be offset by equipping Main Battery Modification 3 bringing the reload down to 24.6 seconds Her turrets have a 180-degree turn time of 33.5 seconds. In addition, Iwami B has good gun angles, and can fire all guns without showing too much side.

Iwami B carries eight 610 mm torpedo tubes in two quad launchers. These are the same torpedoes found on Shimakaze, specifically the 20 km Type 93 torpedoes. They have average speed, bad detection, and 20,967 alpha damage. While the launch angles are not terrible, they are more suited for launching while kiting away from enemy threats. These torpedoes are best used to fire at key areas as area denial but also can be used in close quarter situations.


Iwami B’s hull is visibly similar to Izumo and Hizen, but with a different armor scheme. Her bow and stern are 32 mm thick and she has a 50 mm armored deck. Her armor is sufficient at shattering most HE shells and protects her from AP shells smaller than 461 mm in caliber when sufficiently angled. Her armor belt is 356 mm thick and will bounce all AP shells when correctly angled. Her citadel is long and has the same ‘cheek’ (the part of the bow that meets the middle belt section) weakness as other high tier Japanese battleships. At closer ranges, high caliber AP shells can still citadel her through the ‘cheek’ even when she is otherwise angled.

Her surface concealment is decent at 12.9 km and she has a good HP pool of 80,700. Her 37% torpedo damage reduction is high for her tier. Iwami B can play at medium ranges without much risk of dying quickly.


Iwami B has average maneuverability characteristics, with a top speed of 28.2 knots. Her rudder shift time is good at 14.1 seconds, and her turning circle is slightly better than average at 880 m. Players can reliably dodge most torpedo threats as long as they are aware of the presence of a torpedo destroyer.


Iwami B features a secondary armament which consists of sixteen 100 mm guns. They are the same guns found on Harugumo which have 30 mm HE penetration and a fast rate of fire of 3 seconds. She also has nine 155 mm secondary guns. A secondary build is not recommended on Iwami B due to weakness of her armor at close ranges and the lack of increased range and accuracy on the secondary guns.


Iwami B has poor long- and short-range AA DPS (203 and 283 respectively) with no mid-range AA aura. While she has eight flak clouds, her low DPS means she can’t stop an aircraft carrier strike by herself. Grouping up with allied ships to overlap Anti-Aircraft auras is recommended in games with carriers.

Battle Performance:

Iwami B fills the classic sniper battleship role, positioning around 14 km away from key areas and enemy capital ships. Captains should provide crossfire onto enemy battleships and cruisers by positioning themselves across from friendly battleships or by holding angles towards island positions. Her torpedoes provide another tool for area denial, and should be launched towards cap circles and choke points throughout the battle. Iwami B’s poor close range armor scheme and average speed means she is not a brawler.


  • Good HP pool
  • Decent torpedo protection
  • Good reload time
  • Good dispersion
  • Good firing angles
  • Access to 20 km torpedoes
  • Decent concealment


  • Citadel "cheek" is easy to hit
  • Lower gun count
  • Torpedoes have high detection
  • Weak AA defenses


As a premium ship, Iwami B has no module upgrades to research.

Optimal Configuration


The recommended upgrades are:

Commander Skills


Iwami B equips the following consumables:


As a premium ship, Iwami B comes with Default permanent camouflage and a set of permanent combat bonuses.


Note: Use of the Juliet Charlie signal makes detonation impossible.


Historical Gallery


Ship Change Log

See here for links to Update notes.

  • Available for testing by supertesters in the game starting from Update 12.6.

Testing Changes

  • Available for purchase in the Premium Store during the Black Friday 2023 sale during Update 12.9. Could also drop from Black Friday containers.

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