GamingDiver / WoWs Legends Ships / Mogami
World of Warships: Legends ship guide

Mogami

Beta
Japan · Tier VII · Cruiser · Tech Tree: Combat Heavy Cruisers
HE fire-spam cruiserSustained HE and fires from range or island cover.
Playstyle
  • Hold 12-15 km where rotated focus can find island cover within one heal cycle
  • Avoid: Trading the super-heal advantage in open water
Key characteristics
Long torps (11 km)2 sigma accuracyStrong secondaries (5 km)High fire chanceVisible torps
Community Data

Mogami Community Stats

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Playstyle

Overview

Mogami is a Tier VII Japanese IJN cruiser with the improved AP fuse: her AP shells arm at 60% of the standard armor threshold, so they citadel cruisers that would over-pen a normal CA round. Lean on AP into broadsides and short-angled cruisers - HE-spamming this hull leaves the cohort's best damage tool on the rack. She also packs the super-heal (0.6%/s, for 28 s, every 60 s, 2 charges): each Repair Party charge returns dramatically more HP than a standard heal, so her durability comes from sustain alongside the lead trait. Sonar (4.9 km on ships and 3.5 km on torpedoes, 96 s active, 180 s reload, long uptime) lights up DDs and torpedoes inside its bubble, which lets her contest the cap edge without taking the spotting cycle.

Positioning

Hold 12-15 km where rotated focus can find island cover within one heal cycle. The super-heal (~0.6%/s, roughly twice a standard heal) makes sustained trades profitable that would not be on a standard cruiser, but only if you finish the trade behind cover; open-water sustain just feeds shells.

Potato Avoidance

Trading the super-heal advantage in open water

The kit rewards finishing the trade behind cover so the heal recovers what the salvo took; sustained open-water exposure burns through all 2 charges before the cooldown completes.

Signature Traits

Improved AP fuse (IJN cruiser)

AP arms at 60% of the standard armor threshold (vs 0.9 default). Lets your AP pen broadsiding cruisers that would over-pen a normal CA, citadel hunts the cohort can't pull off, shared by 2/46 T7 CAs.

Punchy HE secondaries

2100.0 max HE alpha per secondary shell, best of T7 CAs. Bigger per-shell damage than peers.

Burny secondaries

8.0% best HE fire chance per secondary shell (before target resistance), top decile of T7 CAs. Stacks fires faster than peers in a brawl.

Holds speed in turns

202.7 hp per metre of turn radius, top decile of T7 CAs. Engine power overpowers lateral drag, so speed loss in sustained turns is mild.

Thick stern plate

30.0 mm stern, top decile of T7 CAs.

Visible torps

1.7 km torpedo detect, bottom decile of T7 CAs. Easy to dodge if targets are looking.

Acquisition

How to get Mogami

Mogami is available in the Combat Heavy Cruisers branch of the Japan Tech Tree for 18,000,000 credits after researching it in the branch. Known module upgrades cost up to 4,050,000 credits. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock.

Show Japan tech-tree branch diagram
Japan Tech Tree

Mogami sits in the Combat Heavy Cruisers branch. The highlighted path shows the local branch context inside the full Japan tree.

5 ships in highlighted branch · scroll to inspect all Japan lines.
JapanIIIIIIIVVVIVIIVIII★
Destroyer
Destroyer Split
Cruiser
Cruiser Split
Battleship
Hybrid Battleship
Carrier
Tier VIIsePJSB527 Tier VIIIDewaPJSB309 Tier VIISuwoPJSB308 Tier VIIIKitakazePJSD219 Tier VIIIYūgumoPJSD209 Tier VIIITakahashiPJSC209 Tier VIIKagerōPJSD208 Tier VIIShimantoPJSC208 Tier VIShiratsuyuPJSD207 Tier VIOmonoPJSC207 Tier VHatsuharuPJSD206 Tier VGokasePJSC206 Tier IVMinekazePJSD205 Tier IVAganoPJSC205 Tier VIIAkizukiPJSD108 Tier VIIShōkakuPJSA108 Tier VIAkatsukiPJSD107 Tier VFubukiPJSD106 Tier IVMutsukiPJSD105 Tier IChikumaPJSC035 Tier IIWakatakePJSD024 Tier VIIIIzumoPJSB021 Tier ★YamatoPJSB018 Tier IITenryūPJSC015 Tier IIIKumaPJSC013 Tier VIIAmagiPJSB013 Tier ★ShimakazePJSD012 Tier VIIIIbukiPJSC012 Tier VINagatoPJSB010 Tier VIIMogamiPJSC009 Tier VRyūjōPJSA009 Tier VIMyōkōPJSC008 Tier IIIIshizuchiPJSB008 Tier VAobaPJSC007 Tier IVKongōPJSB007 Tier VFusōPJSB006 Tier IVFurutakaPJSC005 Tier IIIIsokazePJSD003 Tier IIIHōshōPJSA002
Official WG availability sources

Builds Beta

Build for reload, fire chance, range, concealment, rudder, and survivability. Torpedo utility supports the kiting plan.

Open in Build Tool →

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Cohort position

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Where Mogami sits among Tier VII CAs (46 ships). Notable standouts are shown first; the rest of the cohort-ranked stats are in the expand below. Acquisition variants (Black Friday, Founders Edition) are counted once with their base ship, not as separate peers.

BestHE alpha2,100 (1 of 3 tied) BestAP fuse timer0.03 s (1 of 20 tied) Top 10%Rudder shift8.4 s (4/46) Top 10%Main dispersion129.1 m (5/46) Top 10%Secondary fire chance8% (4/40) Top 10%Turn-speed retention202.7 hp/m (5/45) Top 10%Power-to-weight9.91 hp/t (5/45) Top 25%Max speed34.5 kt (7/46) Top 25%HE shell damage3,400 (6/41) Top 25%HE fire chance17% (7/41) Top 25%Engine power152,000 hp (8/45) Top 25%Torpedo range11.01 km (5/33) Top 25%Torpedo damage17,233 (7/33) Top 25%Stern armor30 mm (10/45) Bottom 25%Main battery range15.31 km (36/46) Bottom 25%Secondary DPM (per side)100,800 (33/40) Bottom 25%AA DPS227 (41/46) Bottom 25%AA threat823 (41/46) Bottom 25%Torpedo speed60 kt (27/33) Bottom 25%Torpedo reload109 s (27/33)
See 28 mid-pack stats

Not standouts for Mogami -- here's where she sits on every other ranked stat in the cohort. Stats tagged NORM are tied across more than half the cohort, so the value is the cohort default rather than a standout.

Hit points39,100 HP(27/46) Concealment12.29 km(19/46) Air detection7.37 km(18/46) Traverse-to-turn ratio5.16 ×(35/46) Main battery caliber203 mm(16/46) Main battery reload11.7 s(31/46) Sigma2(25/46) Fires per minute8.72(15/41) HE DPM174,359(16/41) AP shell damage4,700(15/46) AP DPM241,026(27/46) Secondary HE pen21 mm(13/40) AP velocity840 m/s(31/46) HE velocity840 m/s(25/41) Acceleration9.5 s(17/46) AP arming threshold34 mm(31/46) Displacement15,332 t(21/46) AA range5 km(23/46) Repair heal rate0.6 %/s(18/45) Max armor140 mm(27/46) Citadel belt140 mm(21/45) Bow armor25 mm(31/45) Deck armor100 mm(23/44) NormSecondary dispersion bracket57(37 of 40 tied at this value) NormAP ricochet start45°(33 of 46 tied at this value) NormAP auto-bounce angle60°(33 of 46 tied at this value) NormSecondary range5 km(36 of 40 tied at this value) NormRepair charges2(40 of 45 tied at this value)

Stats & specs

Customize in the Build Tool →Shell ballistics chartMore tools in the WoWS Legends Data Lab

All values are ship base stats with modifications and upgrade changes denoted inline.

Sonar 4.93 kmRepair 2Def-AAFighter
Survivability
Hit PointsInitial: 35,500 → 39,100
Displacement15,332 t
Armor range6–140 mm
Plate armor thicknesses6, 12, 16, 25, 30, 35, 40, 50, 60, 65, 100, 140 mm
Armor material/layer entries45
Fire resistanceInitial: 33.3% → 36.6%
Fire duration30 s
Torp Reduction16%
Magazine HP
ƒThe magazine is the module a detonation comes from. Penetrating hits to it raise the detonation chance from 1% toward 30% as its HP is worn down, so a larger magazine pool rides out citadel hits longer before a detonation becomes likely.
19,600
Steering gear HP
ƒDurability of the steering gears. As this pool drops, hits are likelier to jam the rudder; unlike most modules the steering can be knocked out and repaired but is never permanently destroyed.
11,700
Main Battery
ModuleArtillery: 203 mm/50 Type3
Mounts / barrels5 mounts / 10 barrels
Reload time
patched
  1. baseline13
    In-game data
  2. 2023-11-0214
    MINISTRY OF BALANCE REPORTS: A FLURRY OF CHANGES Main battery reload time reduced from 15 to 14 s.
14 s
Firing range (base)13.9 km
Firing range (top fire control)15.3 km
Turret traverse7 °/s
Shell Grouping (σ)
ƒShell grouping (sigma); shown in-game as Shell Grouping.
2
Max Horiz Disp
ƒHorizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (13922/30·(8−1.1)/1000 + 1.1)·30 = 129.1 m
129.1 m
Max Vert Disp
ƒVertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 129.1 × 0.6 = 77.4 m
77.4 m
Med Horiz Disp
ƒ50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 129.1 × 0.319 (σ=2) = 41.2 m
41.2 m
Med Vert Disp
ƒ50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 77.4 × 0.319 (σ=2) = 24.7 m
24.7 m
Turret turn time
ƒ180 degrees / 7 deg/s traverse speed = 25.7 s.
25.7 s
Base shells/min
ƒ10 broadside guns x 60 / 14 s base reload = 42.9.
42.9
HE shells
HE Damage3,400
HE Velocity840 m/s
Fire Chance17%
HE penetration
ƒ34 mm ≈ 203 mm caliber / 6 (standard HE penetration ratio).
34 mm
HE full-salvo alpha
ƒ3,400 HE damage x 10 broadside guns = 34,000.
34,000
Base HE DPM
ƒ34,000 HE full-salvo alpha x 60 / 14 s base reload = 145,714.
145,714
Installed HE DPM
ƒ34,000 HE full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 174,359.
174,359
Base fires/min
ƒ10 HE shells x 60 / 14 s reload x 17% fire chance = 7.29.
7.29
AP shells
AP Damage4,700
AP Velocity840 m/s
Min Ricochet45 deg
Guaranteed Ricochet60 deg
Fuse Timer0.033 s
Fuse Threshold34 mm
Improved AP FuseYes
AP overmatch
ƒfloor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).
14 mm
AP Pen Close
ƒCanonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: 1e-7 × Krupp × mass^0.69 × caliber_m^-1.07 × v0^1.38 = 1e-7 × 2468 × 125.85^0.69 × 0.203^-1.07 × 840^1.38 = 414.7 mm. Matches the in-game spec card.
414.7 mm
AP Pen Far
ƒSame formula at the ship's max firing range (19.1 km), where the shell has slowed to 361.6 m/s: 1e-7 × 2468 × 125.85^0.69 × 0.203^-1.07 × 361.6^1.38 = 129.6 mm.
129.6 mm
AP full-salvo alpha
ƒ4,700 AP damage x 10 broadside guns = 47,000.
47,000
Base AP DPM
ƒ47,000 AP full-salvo alpha x 60 / 14 s base reload = 201,429.
201,429
Installed AP DPM
ƒ47,000 AP full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 241,026.
241,026
AP AOE Radius
ƒAP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.
24
◇
Torpedoes
ModuleTorpedoes: Type90 mod. 1
Launchers / tubes4 launchers × 4 tubes = 16 tubes
Reload time109 s
Projectile speed60 kt
Range11.01 km
Maximum simulated damage15,933 (est.)
Alpha damage47,800
Torpedo detectability1.7 km
Torpedo launcher traverse25 °/s
Torp Turn7.2 s
Torp Arming185 m
Per-side salvo damage
ƒper-side salvo x per-torpedo simulated damage.
127,464
AA Defense
AA mount pointsInitial: 6 → 22
Close-range AA DPS
ƒSum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (52×3.5×0.9) + (20×3.5×0.9) = 227. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.
227
Maximum AA range
ƒLongest-reaching aura across AA-only + dual-purpose auras.
5 km
25 mm Type96 mod. 1Initial: 4×3 → 8×3 25mm
25 mm/60 Type96 mod. 1 (upgraded hull only)10×1 25mm
25 mm Type96 mod. 14×2 25mm
13 mm Type93 (stock hull only)2×2 13mm
127 mm Type89 A1 (DP)4×2 127mm
Far aura
DPS
ƒIncludes 20 continuous AA damage from dual-purpose secondaries firing as AA in this range band.
20
Range5 km
Medium aura
DPSInitial: 14 → 52
Range3.1 km
Total DPS in Aura
ƒFar 20 + Medium 52 = 72
72
S
Secondary Battery
Mounts4
Firing range5.0 km
Shell Grouping (σ)1
Caliber127 mm
Reload time5 s
HE Damage2,100
Muzzle Velocity725 m/s
Fire Chance8%
Armor Pen21 mm
Min Ricochet91°
Max Ricochet60°
Secondary dispersion type
ƒMax dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.
Standard
Max secondary dispersion @ 5 km
ƒ5 km × 57 + 30 = 315 m.
315 m
Maneuverability
Engine moduleEngine: 152,000 hp
Engine power152,000 hp
Maximum speed34.5 kt
Turning circle radius750 m
Engine power multiplier speed threshold7 kt
Traverse-to-turn ratio5.2× slow
Concealment
Detectability by sea12.29 km
Detectability by air7.37 km
Smoke firing penalty6.95 km
Detect after firing main guns12.29 km
Detect Fire Sea14.29 km
Detect Fire Air10.37 km
Guaranteed Detect2 km
✦
Consumables
Damage Control Party∞ charges · 60 s reload · 5 s active
Choose one
Sonar2 charges · 180 s reload · 96 s active · 4.93 km ship detect · 3.47 km torpedo detect
Defensive AA Fire3 charges · 140 s reload · 25 s active · +100% flak burst boost
Catapult Fighter3 charges · 70 s reload · 55 s active · 5.56 km patrol radius · 1 squadron size
Repair Party2 charges · 60 s reload · 28 s active · 0.6% heal per second · 16.8% of max HP total heal
Module options (2)

Stats above use the fully-upgraded modules. These are the research-tree alternatives; trade-offs are flagged.

HullUpgrade
  • Hit points35,500 → 39,100
  • Rudder shift10.9 → 8.4 s
  • AA mounts6 → 22
  • Close-range AA DPS20 → 52
  • Turret traverse7 → 12 °/s
Fire controlUpgrade
  • Main battery range13,922 → 15314.2 m

See all derived stats

Show ▾

Numbers the spec table cannot show directly: alpha-strike math, DPM, dispersion, AP penetration. Click the formula chip on any row to reveal how it is calculated.

Main battery formulas

Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp129.1 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (13922/30·(8−1.1)/1000 + 1.1)·30 = 129.1 m
Max Vert Disp77.4 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 129.1 × 0.6 = 77.4 m
Med Horiz Disp41.2 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 129.1 × 0.319 (σ=2) = 41.2 m
Med Vert Disp24.7 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 77.4 × 0.319 (σ=2) = 24.7 m
Dispersion familyCruiser Disp.
Standard cruiser dispersion baseline.
AP Pen Close414.7 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: 1e-7 × Krupp × mass^0.69 × caliber_m^-1.07 × v0^1.38 = 1e-7 × 2468 × 125.85^0.69 × 0.203^-1.07 × 840^1.38 = 414.7 mm. Matches the in-game spec card.
AP Pen Far129.6 mm
Same formula at the ship's max firing range (19.1 km), where the shell has slowed to 361.6 m/s: 1e-7 × 2468 × 125.85^0.69 × 0.203^-1.07 × 361.6^1.38 = 129.6 mm.
HE penetration34 mm
34 mm ≈ 203 mm caliber / 6 (standard HE penetration ratio).
AP overmatch14 mm
floor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius24
AP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.
Broadside guns used for alpha10
All 10 barrels bear on the broadside.
Turret turn time25.7 s
180 degrees / 7 deg/s traverse speed = 25.7 s.
HE full-salvo alpha34,000
3,400 HE damage x 10 broadside guns = 34,000.
AP full-salvo alpha47,000
4,700 AP damage x 10 broadside guns = 47,000.
Base HE DPM145,714
34,000 HE full-salvo alpha x 60 / 14 s base reload = 145,714.
Base AP DPM201,429
47,000 AP full-salvo alpha x 60 / 14 s base reload = 201,429.
Installed HE DPM174,359
34,000 HE full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 174,359.
Installed AP DPM241,026
47,000 AP full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 241,026.
Base shells/min42.9
10 broadside guns x 60 / 14 s base reload = 42.9.
Installed shells/min51.3
10 broadside guns x 60 / 11.7 s installed Artillery reload = 51.3.
Base fires/min7.29
10 HE shells x 60 / 14 s reload x 17% fire chance = 7.29.
Installed fires/min8.72
10 HE shells x 60 / 11.7 s installed reload x 17% fire chance = 8.72.

Torpedoes

Torpedo detectability1.7 km
Estimated torpedo reaction time10.9 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed60 kt
Travel time to max range70.6 s
range / (speed kt x 2.6 community game-speed factor).
Tube count16
4 launchers x 4 tubes.
Per-side salvo8 torpedoes
tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).
Full-salvo damage254,928
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage127,464
per-side salvo x per-torpedo simulated damage.

AA defense

Close-range AA DPS227
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (52×3.5×0.9) + (20×3.5×0.9) = 227. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.
Maximum AA range5 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index823
SUM over AA auras of (aura DPS x aura range km). A plane crossing the AA bubble is exposed to each aura for a time proportional to that aura's range, so long-reach DPS is worth more than the same DPS in a short bubble. Units: DPS*km; used to rank overall AA threat across the cohort.

Secondary battery dispersion

Secondary dispersion typeStandard
Max dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.
Max secondary dispersion @ 5 km315 m
5 km × 57 + 30 = 315 m.

Secondary battery firepower

Secondary DPM (per side)100,800
Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), where per-side barrels = mounts × barrels-per-mount / 2 (the guns that bear on one broadside target). Per-family: 4×2 127 mm (4/side) × 60/5 × 2100 = 100,800. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
Max HE alpha2100
Maximum HE damage per shell across secondary HE families. Best on this ship: 2100 from the 127 mm family.
Max HE fire chance8%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 8% from the 127 mm family.
Max HE pen21 mm
Maximum HE armor penetration across secondary HE families (caliber × 1/6 for most nations; 1/4 for German/UK BBs). Shells whose pen falls under a plate's armor thickness shatter for 0 hull damage though fire chance still applies. Best on this ship: 21 mm from the 127 mm family.

Armor

Hull HP 35,500 → 39,100 with hull upgrade, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are the exact in-game values, not estimated.

Section Plates HP cap Threats Tactic
Bow25 mm primary (range 25–40 mm)1,200 (3% of HP)
Overmatched by 380mm+ (Gneisenau, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+
Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)16 mm primary (range 16–100 mm)29,300 (75% of HP)
Overmatched by 283mm+ (Scharnhorst, Scharnhorst '43)Angle bounces 203mm16 mm: HE pens from 127mm+
Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern30 mm primary (range 25–100 mm)1,600 (4% of HP)
Overmatched by 460mm+ (Aki, Musashi)Angle bounces 410mm30 mm: HE pens from 203mm+
Mirror of bow. Same fast saturation.
Citadel140 mm primary (range 12–140 mm)≈ 165,500 (effectively no cap)
Citadel pen ×0.10 damageOver-pen: ×0.10 damage
Effectively no cap; citadel pool sits at ~165k HP on every ship. Damage is gated by pen/over-pen multipliers instead (×0.10 direct pen, ×0.10 over-pen).
Superstructure6 mm primary (range 6–100 mm)900 (2% of HP)
Any HE ≥16 mm pens at full damage
Any HE ≥16 mm pens at full damage. HE-spam target, and the section saturates fast (often only a few thousand HP).
Turret (module, per magazine)separate HP pool, does not drain ship HP19,600 magazine HPMagazine detonation1–30% chance · below ~75% HPPer-turret powder-magazine HP. Detonation chance scales from 1% (no mag damage) to 30% (full mag damage); this range is the in-game value. Detonation can't roll while the ship is above ~75% HP (the standard detonation-protection threshold, not a per-ship stat). Smaller magazines saturate to the 30% ceiling faster.
Secondary mount (127 mm mount)separate HP pool, does not drain ship HP800 per-mount HPDestroyed at 0 HPPer-mount HP for the heaviest secondary on this ship. A mount destroyed at 0 HP is out for the rest of the battle; DCP does not repair destroyed mounts. Smaller (lighter-caliber) secondaries typically share the same HP value.
AA mount (25 mm mount)separate HP pool, does not drain ship HP200 per-mount HPDestroyed at 0 HPPer-mount HP for the heaviest AA on this ship. An AA mount destroyed at 0 HP stops shooting down planes for the rest of the battle; DCP does not repair destroyed mounts. HE shells specifically target AA mounts since the small-caliber HP pool falls fast.
Rudder (module)separate HP pool, does not drain ship HP11,700 module HPIncapacitated at 0 HPWhen module HP reaches 0 the rudder locks at its current angle until DCP repairs it. Repair via Damage Control Party.

Saturation cap = HP a section can absorb before further damage to it is reduced (the "bow-tank" effect). Citadel pool is ~165k on every ship (effectively no cap); damage is gated by pen/over-pen multipliers instead. Superstructure saturates fast but HE always pens regardless of the plate thickness. Rudder (and other module HPs) are a separate pool from ship HP: damaging a module doesn't drain ship HP. Incapacitated modules like the rudder and engine are restored by DCP, but secondary and AA mounts destroyed at 0 HP stay out for the rest of the battle.

Shell ballistics chart

AP penetration, impact velocity, flight time and impact angle vs range. Click to load the interactive chart.

Balance History

Balance updates affecting Mogami. Cards are condensed; use each source link for full context.

Buff ×6Main Battery ×4Torpedo ×1Concealment ×1
2024-12-12

Ministry of Balance: Breaking the Ice

  • Like Ibuki, Mogami is also receiving a slight reload boost to help her comparatively against her peers.
  • Main battery gun reload time reduced from 14 to 13 s.
Read the full official post
2023-11-02

MINISTRY OF BALANCE REPORTS: A FLURRY OF CHANGES

  • Mogami has been overshadowed over time by other cruisers at Tier VII, so we're buffing her damage output.
  • Main battery HE shell damage increased from 3,300 to 3,400.
  • Main battery reload time reduced from 15 to 14 s.
Read the full official post
2021-05-13

May Update: Things Are Heating Up!

  • Main battery turret traverse speed increased from 6°/s to 7°/s.
  • Torpedo speed increased from 58 to 60 kts.
  • Torpedo detectability range by sea decreased from 1.8 to 1.7 km.
Read the full official post
Exteriors

Skins & permanent camouflages

Every custom exterior Mogami can equip, from in-game data.

Primary official WG sources

Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.

2024-03-26 · Early access / tech tree line Fleet From the Eastern Seas: New Japanese Light Cruisers in Early Access Line source 2022-07-14 · Official ship feature / stats Strive for Greatness: Tier VIII development blog Official source 2020-05-14 · Patch notes Update: May 2020 Patch notes 2021-05-13 · Patch notes May Update: Things Are Heating Up! Patch notes 2024-12-12 · Patch notes Holiday Update: Glimpse Into the Future Patch notes 2025-04-03 · Patch notes April Update: The Bonds of Loyalty Patch notes