Onimusha Boss Guide: All 18 Bosses & Carnage S-Rank

Quick Answer: How to Defeat Bosses on Carnage Difficulty

Direct Answer: Conquering bosses in Onimusha: Way of the Sword on Carnage (修罗) difficulty requires mastering Deflection Issen (弹一闪) and exploiting elemental weaknesses. On Carnage, counter windows shrink to 33ms (2 frames at 60 FPS) and bosses inflict 2.5x damage. Never spam standard attacks; instead, bait predictable combo starters, deflect on initial impact to knock back boss weapons, and immediately punish with Chain Issen (连闪) or heavy weapon arts to stagger them into Break Issen (崩一闪).

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All 18 Bosses: Complete Encounter Matrix

The table below catalogs every main boss encountered across the 10 campaign chapters, their elemental alignments, and requirements for S-Rank Rematch clears:

#	Boss Name & Japanese Title	Chapter & Location	Elemental Weakness	S-Rank Clear Time	Recommended Blade
1	Genma Vanguard Hanzuchi (先锋半槌)	Ch 1: Sanjo Bridge	Lightning	< 90s	Normal Katana / Raizan
2	Cursed Ronin Jinbei (狂刃甚平)	Ch 2: Gion Alley	Lightning	< 75s	Raizan (雷斩刀)
3	Corrupted Monk Benkei (破戒僧 弁庆)	Ch 3: Kiyomizu Balcony	Wind	< 120s	Senpu (疾风刀)
4	Drowned Maiden Mizuchi (水魑妖女)	Ch 4: Kamo Aqueducts	Fire	< 110s	Enryu (炎龙剑)
5	Nue, Thunder Chimera (雷兽 鵺)	Ch 5: Fushimi Inari	Wind / Earth	< 150s	Senpu (疾风刀)
6	Iron Colossus Daikokuten (黑铁罗汉)	Ch 5: Torii Inner Sanctum	Lightning	< 130s	Raizan (雷斩刀)
7	Lady Jorogumo (络新妇 蜘蛛女鬼)	Ch 6: Nijo Outer Keep	Fire	< 140s	Enryu (炎龙剑)
8	Siege Drake Basan (火鸟婆娑)	Ch 6: Nijo Citadel	Lightning	< 160s	Raizan (雷斩刀)
9	Ash Golem Enma-Shin (焦炭罗刹)	Ch 7: Golden Pavilion	Wind	< 120s	Senpu (疾风刀)
10	Twin Shadow Shinobi (阴阳影忍)	Ch 7: Relic Vault	Fire / AoE	< 100s	Enryu (炎龙剑)
11	Frost Demon Yuki-Onna (雪女 冰华)	Ch 8: Mt. Hiei Base	Fire	< 135s	Enryu (炎龙剑)
12	General Oda’s Shadow (织田幻影将军)	Ch 8: Cursed Summit	Lightning (Deflect)	< 140s	Raizan (雷斩刀)
13	Void Serpent Yamata-Gaki (虚界八岐)	Ch 9: Astral Threshold	Pure Light	< 180s	Raizan / Enryu
14	Sasaki Ganryu (佐佐木岩流)	Ch 9: Spirit Bridge	Stance Counter	< 150s	Senpu / Raizan
15	Corrupted Takamura (堕落策士 高村)	Ch 9: Astral Gate	Void / Fire	< 110s	Enryu (炎龙剑)
16	Genma Sovereign Nobunaga (P1)	Ch 10: Throne of Void	Lightning	< 120s	Raizan (雷斩刀)
17	Void Emperor Nobunaga (P2)	Ch 10: Obsidian Core	Purple Souls (Oni)	< 180s	Bishamonten / Enryu
18	Demon God King (True Final Boss)	Ch 10: Secret Astral Spire	Sacred Void	< 210s	Bishamonten Sword

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Tactical Deep Dive: Key Boss Profiles & Strategies

1. Sasaki Ganryu (佐佐木岩流) - Chapter 9: Spirit Bridge

Combat Parameter	Operational Intel
Japanese Title	佐佐木岩流 (Sasaki Ganryu - The Peerless Prodigy)
Arena Encounter	Chapter 9: Spirit Bridge over the Astral Abyss
Elemental Weakness	None (Neutral); vulnerable to Stance Break Counters
Optimal Weapon	Raizan (雷斩刀) for speed or Senpu (疾风刀) for evasive counters
S-Rank Benchmark	Under 150 seconds, >= 3 Issen executions, Damage taken < 15%

Regarded as the most technically demanding one-on-one duel in the game, Ganryu mirrors Musashi’s posture and punishes reckless inputs with near-instant counter slashes.

• Signature Technique: Tsubame Gaeshi (燕返):
  • A three-hit slash that curves through the air. The first downward cleave and third rising slash carry hyper-armor and cannot be guarded normally.
  • Deflection Window: Target the second upward stroke. Watch for the silver crescent flash trailing along his nodachi blade edge.
• Counter Strategy:
  • When Ganryu enters his high-stance windup (Ganryu no Kamae), he cannot dodge. Tap Attack within 33ms of his lead foot touching the wooden planks to trigger a cinematic Chain Issen (连闪).
  • After landing an Issen, immediately follow up with Raizan’s Raikou-zan to lock him into electrical stagger, stripping half his posture gauge in a single cycle.

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2. Corrupted Monk Benkei (破戒僧 弁庆) - Chapter 3: Kiyomizu Balcony

Combat Parameter	Operational Intel
Japanese Title	破戒僧 弁庆 (Corrupted Monk Benkei)
Arena Encounter	Chapter 3: Kiyomizu Temple Wooden Balcony
Elemental Weakness	Wind (疾风) / Senpu Gale Dual Blades
Optimal Weapon	Senpu (疾风刀) for rapid flank positioning
S-Rank Benchmark	Under 120 seconds, >= 3 Issen executions

Benkei wields an oversized iron naginata with sweeping horizontal arcs that catch players attempting backwards rolls.

• Primary Attack Patterns:
  • Triple Horizontal Sweep: Two heavy horizontal swipes followed by a delayed overhead cleave that splinters wooden floorboards.
  • Kinetic Shockwave Thrust: Benkei charges his naginata into the floor, projecting a linear shockwave across the stage.
• Deflection & Punish Routine:
  • Do not roll backwards during his sweeping attack. Stand your ground and execute a Deflection Issen on the second swing.
  • When Benkei hoists his naginata vertically for the overhead smash, wait for the weapon head to pause at peak elevation, then tap Attack to score a clean Normal Issen (闪).
  • Activate Senpu’s Tsumuji-gaze whirlwind art while he is staggered to trap his bulky frame in multi-hit vortex damage.

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3. Nue, Thunder Chimera (雷兽 鵺) - Chapter 5: Fushimi Inari

Combat Parameter	Operational Intel
Japanese Title	雷兽 鵺 (Nue - Thunder Chimera)
Arena Encounter	Chapter 5: Fushimi Inari Submerged Torii Gate Sanctum
Elemental Weakness	Wind (Senpu) and Earth; Absorbs Lightning
Optimal Weapon	Senpu (疾风刀) for aerial reach
S-Rank Benchmark	Under 150 seconds, 0 water puddle electrocutions

A chimeric nightmare with the face of a monkey, limbs of a tiger, body of a tanuki, and a venomous serpent for a tail.

• Primary Attack Patterns:
  • Lightning Cascade: Summons electrical discharges from the storm sky that conduct through standing water puddles.
  • Tail Venom Arc: A 180-degree tail sweep emitting a creeping toxic mist.
  • Torii Dive Pounce: Nue leaps backwards onto a wooden torii arch before launching a high-speed sonic dive.
• Deflection & Punish Routine:
  • Equip Senpu (Gale Dual Blades). When Nue perches atop the torii pillar, track its front paws.
  • The instant its claws push off the wood, trigger your counter attack. Landing this Issen grounds the chimera for 6 seconds.
  • Focus all damage on its vulnerable underbelly to force an early phase transition.

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4. Lady Jorogumo (络新妇 蜘蛛女鬼) - Chapter 6: Nijo Keep

Combat Parameter	Operational Intel
Japanese Title	络新妇 蜘蛛女鬼 (Lady Jorogumo - Demon Weaver)
Arena Encounter	Chapter 6: Nijo Outer Keep Burning Chamber
Elemental Weakness	Fire (炎龙) / Enryu Flame Greatsword
Optimal Weapon	Enryu (炎龙剑) for instant web burning
S-Rank Benchmark	Under 140 seconds, take zero web-bind immobilizations

Lady Jorogumo combines an upper pale courtesan figure with a massive obsidian spider chassis, weaving sticky web barriers across burning beams.

• Primary Attack Patterns:
  • Silk Cocoon Snare: Shoots three sticky silk projectile lines that tether Musashi, draining mobility by 70%.
  • Ceiling Drop Ambush: Scuttles into the smoke canopy and drops directly overhead with crushing weight.
  • Bladed Leg Flurry: Rapid four-hit stabbing sequence with front talons.
• Deflection & Punish Routine:
  • Keep Enryu (Flame Greatsword) equipped. Casting Guren-ha immediately incinerates all webbing in the arena, preventing entrapment.
  • When she readies the third leg stab in her flurry, press Guard to trigger a Deflection stagger.
  • Switch to two-handed heavy swings to crack her carapace plates, opening her up for a Break Issen (崩一闪) finisher.

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5. General Oda’s Shadow (织田幻影将军) - Chapter 8: Cursed Summit

Combat Parameter	Operational Intel
Japanese Title	织田幻影将军 (General Oda’s Shadow - Spectral Warlord)
Arena Encounter	Chapter 8: Mt. Hiei Cursed Summit Overlook
Elemental Weakness	Lightning Deflection / Stagger follow-up
Optimal Weapon	Raizan (雷斩刀) for barrier penetration
S-Rank Benchmark	Under 140 seconds, successfully reflect at least 2 bullets

A spectral manifestation of Nobunaga wielding both an enchanted demonic matchlock firearm (tanegashima arquebus) and a curved nodachi.

• Primary Attack Patterns:
  • Demonic Gunfire: High-velocity projectile volley that penetrates regular blocks.
  • Shadow Phase Dash: Disappears into purple smoke, reappearing behind the player with a sweep slash.
  • Volley Barrage: Teleports to the perimeter wall and fires three consecutive explosive slugs.
• Deflection & Punish Routine:
  • Bullet Parry Mechanic: You cannot hold guard against firearm rounds. Tap Guard at the exact frame of the muzzle spark. A clean parry deflects the demonic slug back into Oda’s torso, knocking him flat on the roof tiles.
  • Close the distance instantly while he recovers, switch to Raizan, and execute Raikou-zan to shred through his spectral shield.

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6. Genma Sovereign Nobunaga (幻魔霸王 织田信长) - Chapter 10: Obsidian Core

Combat Parameter	Operational Intel
Japanese Title	幻魔霸王 织田信长 (Genma Sovereign Nobunaga - Demonic Overlord)
Arena Encounter	Chapter 10: The Obsidian Void Core
Elemental Weakness	Sacred Void / Oni Awakening Form
Optimal Weapon	Bishamonten Sword or Enryu (Level 3)
S-Rank Benchmark	Under 180 seconds, activate Oni Awakening at least once

The climatic campaign showdown fought inside the dimensional void, featuring two distinct combat phases.

• Phase 1: Phantom Blade Master:
  • Nobunaga summons floating phantom swords in an orbit. Sweep through them using Enryu’s wide arc or parry the central blade as it launches.
  • When Nobunaga teleports downward with a two-handed thrust, execute a forward Normal Issen at the apex of his descent.
• Phase 2: Obsidian Colossus:
  • Nobunaga encases himself in impenetrable demonic crystal plating. Standard steel and elemental weapons deal zero damage.
  • The Solution: Gather 5 Purple Souls by landing consecutive parries or using soul-attracting talismans.
  • Trigger Oni Awakening (鬼武者变身). In Oni form, your empowered slashes shatter the obsidian armor plates, revealing the pulsating demonic core for a fight-ending Break Issen Finish.

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Carnage Difficulty (修罗) Survival Rules

1. Never Panic Roll: Recovery animation frames after a dodge leave Musashi completely vulnerable to lethal strikes. Maintain your guard stance and rely on Deflection.
2. Prioritize Kishin Shrines: Upgrade your primary blade to Level 3 before Chapter 5 to unlock extended boss stagger frames.
3. Equip the Rosary of the Exorcist: Acquired on Floor 10 of the Dark Realm, this relic draws free souls automatically during combat, enabling steady HP and MP recovery without pausing to channel R2.

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S-Rank Rematch Rating Checklist

To achieve S-Rank across all 18 rematches in the post-game arena:

• Clear time under the benchmark listed in the encounter matrix.
• Retain at least 85% of your maximum health (damage taken <= 15%).
• Execute at least 3 successful Issen or Break Issen techniques.
• S-Rank rewards: Unlocks the Golden Demon Armor and infinite talisman charms.