Mutsuki Build & Guide | WoWs Legends

Playstyle

Overview

Mutsuki is a Tier IV Japanese torpedo destroyer reaching 8 km. The torpedoes travel at 63 kt, so target reaction time is shorter than peer DDs; this is a torpedo-spam kit, not a gun trade kit. Standout traits: best heavy citadel belt in T4 DDs (19 mm).

Positioning

Sit at the edge of a contested cap from concealment and cycle torpedo waves into lanes the enemy has to use - 8 km reach at 63 kt means the wall arrives before targets can react. Drop on probable lanes from cover, stay unspotted between waves, and let the wall do the work.

Potato Avoidance

Holding 8-km torpedoes for a perfect shot

The kit pays out by saturating lanes, not by waiting for guaranteed broadsides; missed waves still force rotations and protect your team's flank. Idle torpedo tubes are the worst output state.

Signature Traits

Heavy citadel belt

19.0 mm citadel belt, best of T4 DDs. Citadels through angle are rare.

Heavy magazine armor

12.0 mm magazine protection, best of T4 DDs. Detonation-resistant.

Thick citadel floor

12.0 mm citadel bottom, best of T4 DDs. Deep-water torps and underwater pen do less.

Long-range torps

8.01 km torpedo range, top decile of T4 DDs.

Visible torps

1.6 km torpedo detect, worst of T4 DDs. Easy to dodge if targets are looking.

Low HE DPM

28333 HE DPM, bottom decile of T4 DDs. Don't bank on burn pressure.

Acquisition

How to get Mutsuki

Mutsuki is available in the Torpedo Destroyers branch of the Japan Tech Tree for 500,000 credits after researching it in the branch. Known module upgrades cost up to 125,000 credits.

Show Japan tech-tree branch diagram

Japan Tech Tree

Mutsuki sits in the Torpedo Destroyers branch. The highlighted path shows the local branch context inside the full Japan tree.

8 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

Builds Beta

Build for concealment, torpedo reload/damage, speed, and survivability.

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Cohort position

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Where Mutsuki sits among Tier IV DDs (21 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.

BestStealth profile5.62 km / 2.81 km (1 of 3 tied / 1 of 3 tied) BestRudder shift2.8 s (1 of 2 tied) BestMain dispersion80.3 m (1 of 2 tied) BestCitadel belt19 mm (1/20) Top 10%Torpedo range8.01 km (3/21) Top 10%Max armor19 mm (3/21) Top 25%AP arming threshold20 mm (5/19) Top 25%AA threat347 (6/21) Top 25%Torpedo damage14,600 (5/21) Top 25%Stern armor14 mm (5/20) Top 25%Deck armor19 mm (3/19) Bottom 25%Main battery range9.58 km (19/21) WorstFires per minute1.17 (21/21) WorstHE DPM28,333 (21/21) WorstAP DPM33,333 (19/19)

See 20 mid-pack stats

Not standouts for Mutsuki -- 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 points11,300 HP(15/21) Max speed37.5 kt(7/21) Traverse-to-turn ratio4.98 ×(11/21) Main battery caliber120 mm(16/21) Main battery reload7.2 s(15/21) HE fire chance7%(16/21) AP velocity825 m/s(7/19) HE velocity825 m/s(9/21) Acceleration10.1 s(9/21) Engine power38,500 hp(11/21) Turn-speed retention70 hp/m(11/21) Displacement1,772 t(8/21) Power-to-weight21.73 hp/t(10/21) AA DPS112(7/21) AA range3.1 km(9/21) Torpedo speed63 kt(9/21) Torpedo reload73 s(14/21) Bow armor14 mm(7/20) NormSigma2(20 of 21 tied at this value) NormAP fuse timer0.01 s(15 of 19 tied at this value)

Peers in this cohort

Show all 20 peers

Stats & specs

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

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

SmokeEngine Boost

Survivability

Hit PointsInitial: 9,500 → 11,300

Displacement1,772 t

Armor range6–19 mm

Plate armor thicknesses6, 10, 12, 14, 19 mm

Armor material/layer entries27

Fire resistanceInitial: 13.3% → 16.6%

Fire duration30 s

Torp Reduction0%

Magazine HP

ƒ

The 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.

5,700

Steering gear HP

ƒ

Durability 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.

3,400

Main Battery

ModuleArtillery: 120 mm/45 Type3

Mounts / barrels2 mounts / 2 barrels

Reload time8 s

Firing range (base)8.7 km

Firing range (top fire control)9.6 km

Turret traverse10 °/s

Shell Grouping (σ)

ƒ

Shell grouping (sigma); shown in-game as Shell Grouping.

2

Max Horiz Disp

ƒ

Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (8711/30·(8−0.5)/1000 + 0.5)·30 = 80.3 m

80.3 m

Max Vert Disp

ƒ

Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 80.3 × 0.6 = 48.2 m

48.2 m

Med Horiz Disp

ƒ

50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 80.3 × 0.32 (σ=2) = 25.7 m

25.7 m

Med Vert Disp

ƒ

50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 48.2 × 0.32 (σ=2) = 15.4 m

15.4 m

Turret turn time

ƒ

180 degrees / 10 deg/s traverse speed = 18 s.

18 s

Base shells/min

ƒ

2 broadside guns x 60 / 8 s base reload = 15.

15

HE shells

HE Damage1,700

HE Velocity825 m/s

Fire Chance7%

HE penetration

ƒ

20 mm ≈ 120 mm caliber / 6 (standard HE penetration ratio).

20 mm

HE full-salvo alpha

ƒ

1,700 HE damage x 2 broadside guns = 3,400.

3,400

Base HE DPM

ƒ

3,400 HE full-salvo alpha x 60 / 8 s base reload = 25,500.

25,500

Base fires/min

ƒ

2 HE shells x 60 / 8 s reload x 7% fire chance = 1.05.

1.05

AP shells

AP Damage2,000

AP Velocity825 m/s

Min Ricochet45 deg

Guaranteed Ricochet60 deg

Fuse Timer0.01 s

Fuse Threshold20 mm

AP overmatch

ƒ

floor(120 mm caliber / 14.3) = 8 mm (AP auto-penetrates plating this thick or less).

8 mm

AP Pen Close

ƒ

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 × 1750 × 20.3^0.69 × 0.12^-1.07 × 825^1.38 = 143 mm. Matches the in-game spec card.

143 mm

AP Pen Far

ƒ

Same formula at the ship's max firing range (12 km), where the shell has slowed to 255 m/s: 1e-7 × 1750 × 20.3^0.69 × 0.12^-1.07 × 255^1.38 = 28.3 mm.

28.3 mm

AP full-salvo alpha

ƒ

2,000 AP damage x 2 broadside guns = 4,000.

4,000

Base AP DPM

ƒ

4,000 AP full-salvo alpha x 60 / 8 s base reload = 30,000.

30,000

AP AOE Radius

ƒ

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.

7

◇

Torpedoes

ModuleTorpedoes: Type8 mod. 1

Launchers / tubes2 launchers × 3 tubes = 6 tubes

Reload time73 s

Projectile speed63 kt

Range8.01 km

Maximum simulated damage13,400 (est.)

Alpha damage40,200

Torpedo detectability1.6 km

Torpedo launcher traverse25 °/s

Torp Turn7.2 s

Torp Arming194 m

Per-side salvo damage

ƒ

per-side salvo x per-torpedo simulated damage.

80,400

AA Defense

AA mount pointsInitial: 6 → 10

Close-range AA DPS

ƒ

Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (32×3.5×1) = 112. 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.

112

Maximum AA range

ƒ

Longest-reaching aura across AA-only + dual-purpose auras.

3.1 km

25 mm Type96 mod. 16×3 25mm

25 mm/60 Type96 mod. 1 (upgraded hull only)4×1 25mm

DPSInitial: 23 → 32

Range3.1 km

Maneuverability

Engine moduleEngine: 38,500 hp

Engine power38,500 hp

Maximum speed37.5 kt

Turning circle radius550 m

Engine power multiplier speed threshold7 kt

Traverse-to-turn ratio5.0× drags

Concealment

Detectability by sea5.62 km

Detectability by air2.81 km

Smoke firing penalty2.04 km

Detect after firing main guns5.62 km

Detect Fire Sea7.62 km

Detect Fire Air5.81 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 40 s reload · 5 s active

Smoke Generator2 charges · 240 s reload · 15 s emit / 77 s cloud active

Engine Boost2 charges · 180 s reload · 120 s active · +8% speed bonus

Module options (2)

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

HullTrade-off

Hit points9,500 → 11,300
Rudder shift4.2 → 2.8 s
AA mounts6 → 10
Close-range AA DPS23 → 32
Turret traverse10 → 5 °/s

Fire controlUpgrade

Main battery range8,711 → 9582.1 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 Disp80.3 m

Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (8711/30·(8−0.5)/1000 + 0.5)·30 = 80.3 m

Max Vert Disp48.2 m

Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 80.3 × 0.6 = 48.2 m

Med Horiz Disp25.7 m

50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 80.3 × 0.32 (σ=2) = 25.7 m

Med Vert Disp15.4 m

50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 48.2 × 0.32 (σ=2) = 15.4 m

AP Pen Close143 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 × 1750 × 20.3^0.69 × 0.12^-1.07 × 825^1.38 = 143 mm. Matches the in-game spec card.

AP Pen Far28.3 mm

Same formula at the ship's max firing range (12 km), where the shell has slowed to 255 m/s: 1e-7 × 1750 × 20.3^0.69 × 0.12^-1.07 × 255^1.38 = 28.3 mm.

HE penetration20 mm

20 mm ≈ 120 mm caliber / 6 (standard HE penetration ratio).

AP overmatch8 mm

floor(120 mm caliber / 14.3) = 8 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius7

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 alpha2

All 2 barrels bear on the broadside.

Turret turn time18 s

180 degrees / 10 deg/s traverse speed = 18 s.

HE full-salvo alpha3,400

1,700 HE damage x 2 broadside guns = 3,400.

AP full-salvo alpha4,000

2,000 AP damage x 2 broadside guns = 4,000.

Base HE DPM25,500

3,400 HE full-salvo alpha x 60 / 8 s base reload = 25,500.

Base AP DPM30,000

4,000 AP full-salvo alpha x 60 / 8 s base reload = 30,000.

Base shells/min15

2 broadside guns x 60 / 8 s base reload = 15.

Base fires/min1.05

2 HE shells x 60 / 8 s reload x 7% fire chance = 1.05.

Torpedoes

Torpedo detectability1.6 km

Estimated torpedo reaction time9.8 s

detectability / (speed kt x 2.6 community game-speed factor).

Torpedo speed63 kt

Travel time to max range48.9 s

range / (speed kt x 2.6 community game-speed factor).

Tube count6

2 launchers x 3 tubes.

Per-side salvo6 torpedoes

6 (centerline launchers train across - full salvo to either side).

Full-salvo damage80,400

tube count x per-torpedo simulated damage (all torpedoes hitting).

Per-side salvo damage80,400

per-side salvo x per-torpedo simulated damage.

AA defense

Close-range AA DPS112

Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (32×3.5×1) = 112. 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 range3.1 km

Longest-reaching aura across AA-only + dual-purpose auras.

AA threat index347

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.

Armor

Hull HP 9,500 → 11,300 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
Bow	14 mm primary (range 10–14 mm)	1,700 (15% of HP)	Overmatched by 203mm+ (Desert Falcon, Baleares)Angle bounces 152mm14 mm: HE pens from 127mm+	Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Stern	14 mm primary (range 10–14 mm)	1,000 (9% of HP)	Overmatched by 203mm+ (Desert Falcon, Baleares)Angle bounces 152mm14 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	19 mm primary (range 10–19 mm)	≈ 165,500 (effectively no cap)	Citadel pen ×0.50 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 (×0.50 direct pen, ×0.10 over-pen).
Superstructure	6 mm primary (range 6–19 mm)	700 (6% 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 HP	5,700 magazine HP	Magazine detonation1–30% chance · below ~75% HP	Per-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.
AA mount (25 mm mount)	separate HP pool, does not drain ship HP	200 per-mount HP	Destroyed at 0 HP	Per-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 HP	3,400 module HP	Incapacitated at 0 HP	When 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.

Exteriors

Skins & permanent camouflages

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

DefaultThe ship’s standard exterior

Mutsuki

Mutsuki Community Stats