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Tier IXBattleship
JapanPremiumUncommonGlobal
JapanPremiumUncommonGlobalIwami
WoWS World of Warships Japan Battleship · Tier IX
- Main Battery
- 410 mm/50 10th Year Type Mod.A in a twin-gun turret
- 4 turrets × 2 barrels
- Range 22.3 km
- Secondaries
- 155 mm HE Type0
- Secondaries
- 100 mm HE Type 98
- Range 6.95 km
- Torpedoes
- 610 mm Quad
- 2 launchers × 4 tubes
- Range 20 km
Specifications
Iwami Win Rate & Combat Stats
Sample of 453.6K players · as of 2026-08-06ServerBattlesWin rateAvg damage
EUBattles 958,642
958.6K958,642
Win rate
48.93%
#52 of 58
Avg damage
64,415
#47 of 58
ASIABattles 466,654
466.7K466,654
Win rate
50.08%
#46 of 58
Avg damage
63,565
#51 of 58
NABattles 327,916
327.9K327,916
Win rate
49.27%
#46 of 58
Avg damage
63,597
#50 of 58
Averages from our own crawled player sample, not official server-wide data. The sample skews toward active clan players, so its overall win rate runs about 1 point above the true server average. Battle counts are career totals and include games played before this ship’s past balance changes.
Survivability
Hit Points80,700
#13 of 65
Group avg 73,000Flood Damage37%
Main Belt Armor356 mm
Deck Armor55 mm
Bow / Stern Armor32 mm
Ship Length255.2 m
Ship Width37.4 m
Main Battery
Main Guns4 × 2
Caliber410 mm
Firing Range22.3 km
#12 of 65
Group avg 20.5 kmReload Time28.0 s
Rotation Time35.0 s
Max Dispersion244 m
Sigma2.10
Shell Types
AP Shell
Damage12,750
Shell Velocity834 m/s
Overmatch Threshold28.7 mm
Ricochet Angle45° / 60°
Normalization6°
Fuse Threshold68 mm
Air Drag0.34
Flight Time13.35 s
DPM218,571
#45 of 65
Group avg 236,095HE Shell
Damage6,500
Shell Velocity834 m/s
Fire Chance30%
Penetration68 mm
Air Drag0.34
Flight Time13.37 s
DPM111,429
Torpedoes
Torpedo Tubes2
Speed62 knots
Range20.0 km
#1 of 12
Group avg 13.0 kmDamage20,966
#2 of 12
Group avg 16,375Alpha Damage58,700
Splash Damage1,400
Flood Chance355%
Detectability2.50 km
Reload Time150.0 s
#10 of 12
Group avg 111.8 s180° Rotation7.2 s
Arming Time1 s
Spread Angle4.8° / 16°
Torpedo Caliber610 mm
Tube Module HP1,200
Fuse Depth0.14 m
Secondary Battery
Secondary Guns11
Range7.0 km
Sigma1.00
Max Dispersion259.4 m
Accuracy★★★★☆ Excellent
Total DPM661,000
PJPA040_Shell_100mm_HE_C_Type_98(8×2)
Damage1,700
HE Penetration30 mm
Fire Chance6%
Rate of Fire20 rpm
PJPA095_Shell_155mm_HE_SG_Type_0(3×3)
Damage2,600
HE Penetration26 mm
Fire Chance10%
Rate of Fire5 rpm
AA Defense
Flak Bursts8
Flak Damage1,470
AA Ranges
2.5 km284 dps
5.8 km203 dps
Maneuverability
Max Speed28.2 knots
#48 of 65
Group avg 30.2 knotsTurning Radius880 m
#24 of 65
Group avg 894 mRudder Shift Time14.1 s
Engine Power145,000 hp
Displacement58,962 t
Power-to-Weight2.46 hp/t
Concealment
Max Surface Detection15.89 km
#27 of 65
Group avg 15.82 kmMin Surface Detection12.87 km
Air Detection10.00 km
Submarine Detection10.00 km
Consumables
Slot 1
Damage Control Party
Damage Control Party
Reload80 s
Duration10 s
Charges∞
Slot 2
Repair Party
Repair Party
Reload80 s
Duration28 s
Charges4
Heal Rate0.5%/s
Citadel10%
Non-Citadel50%
Armament
Depth Charge Airstrike
Depth Charge Airstrike
Reload30 s
Charges2
Strike Range0.5–10.0 km
Planes8
Flights2
Bomb Damage4200
Fire Chance24%
Iwami Change History
- Increased the accuracy of secondary battery guns - they are now similar in the accuracy to the secondary guns of Georgia.
Torpedo range increased: 12 to 20 km.
- These torpedoes are similar to the ones carried by Shimakaze
- Their reload time was120 → 150 s
- BuffMain battery sigma parameter1.9 → 2.1
- Buffmain battery firing range20.3 → 22.3 km
- BuffDeck armor thickness32 → 50 mm
- Nerfmain battery reload time25 → 28 s
- Buffrudder shift time17.1 → 14 s
Ballistics
Armor Model
Overview
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.
Modules
410 mm/50 10th Year Type Mod.A in a twin turret
410 mm/50 10th Year Type Mod.A in a twin turret
Main Battery
Rate of Fire:2.1
Max AP Damage:12,750
Max HE Damage:6,500
Rotation Time:35s
Type90 mod. 1
Type90 mod. 1
Torpedoes
Range:0 km
Max Damage:20,966
Reload Time:0.4 knots
Torpedo Speed:62 knots
Iwami
Iwami
Hull
AA Guns:62
Main Guns:4
Secondary Guns:11
HP:80,700
Range:19-508
Torpedo Tubes:2
Propulsion: 145,000 hp
Propulsion: 145,000 hp
Engine
Max Speed:28.2 knots
Type9 mod. 1
Type9 mod. 1
Fire Control
Range:0 km
Upgrades
Slot 1
Auxiliary Armaments Modification 1
Auxiliary Armaments Modification 1
AA mount survivability: +100%
Secondary battery survivability: +100%
Main Armaments Modification 1
Main Armaments Modification 1
Risk of main battery becoming incapacitated: -20%
Main battery survivability: +50%
Main battery repair time: -20%
Risk of torpedo tubes becoming incapacitated: -20%
Torpedo tubes survivability: +50%
Torpedo tubes repair time: -20%
Damage Control Party Modification 1
Damage Control Party Modification 1
Consumable action time: +40%
Slot 2
Engine Room Protection
Engine Room Protection
Risk of steering gears becoming incapacitated: -20%
Steering gears repair time: -20%
Risk of engine becoming incapacitated: -20%
Engine repair time: -20%
Damage Control System Modification 1
Damage Control System Modification 1
Risk of catching fire: -5%
Risk of flooding: -3%
Slot 3
Torpedo Tubes Modification 1
Torpedo Tubes Modification 1
Risk of torpedo tubes becoming incapacitated: -40%
Torpedo tubes traverse speed: +20%
Torpedo speed: +5%
Aiming Systems Modification 1
Aiming Systems Modification 1
Maximum main battery shell dispersion: -7%
Maximum secondary battery shell dispersion: -5%
Secondary battery firing range: +5%
Torpedo tubes traverse speed: +20%
AA Guns Modification 1
AA Guns Modification 1
Priority AA sector preparation time: -20%
Secondary Battery Modification 1
Secondary Battery Modification 1
Maximum secondary battery shell dispersion: -20%
Secondary battery firing range: +20%
Main Battery Modification 2
Main Battery Modification 2
Main battery traverse speed: +15%
Slot 4
Airstrike Modification 1
Airstrike Modification 1
Airstrike aircraft HP: +25%
Airstrike armament reload time: -20%
Depth charge damage: +15%
Steering Gears Modification 1
Steering Gears Modification 1
Rudder shift time: -20%
Propulsion Modification 1
Propulsion Modification 1
Maximum reverse speed at full power: +140%
Time to reach full engine power when decelerating: -50%
Maximum forward speed at full power: +140%
Time to reach full engine power when accelerating: -50%
Damage Control System Modification 2
Damage Control System Modification 2
Fire extinguishing time: -15%
Flooding recovery time: -15%
Slot 5
Ship Consumables Modification 1
Ship Consumables Modification 1
Ship consumable action time: +10%
Concealment System Modification 1
Concealment System Modification 1
Squadron detectability range: -10%
Dispersion of shells fired by enemies attacking your ship: +5%
Ship's detectability range: -10%
Ship detectability for submarines when underwater: -10%
Torpedo Lookout System
Torpedo Lookout System
Assured acquisition range of torpedoes: 1.8km
Slot 6
Auxiliary Armaments Modification 2
Auxiliary Armaments Modification 2
Continuous AA damage: +15%
Damage from AA shell explosions: +15%
Number of explosions produced by AA defense salvos when the Defensive AA Fire consumable is active: +2
Secondary battery reload time: -20%
Gun Fire Control System Modification 2
Gun Fire Control System Modification 2
Main battery firing range: +16%
Torpedo Tubes Modification 2
Torpedo Tubes Modification 2
Risk of torpedo tubes becoming incapacitated: +50%
Torpedo tube reload time: -15%
Main Battery Modification 3
Main Battery Modification 3
Main battery traverse speed: -13%
Main battery reload time: -12%