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How to Beat Byakue - Hundred Defilements - Onimusha Way of the Sword

Last Updated: September 5, 2026 at 9:36 AM
Table of Contents

Byakue -Hundred Defilement in Onimusha Way of the Sword

Byakue Summary

Byakue is an axe-wielding Genma that only appears during the Special Challenge event in Onimusha: Way of the Sword demo. It is an aggressive foe with a high HP pool, so approach the fight with caution and apply everything you've learned to bring it down!

Quest
Special Challenge
The Curse of Kiyomizu-zaka Slope

How to Unlock Byakue Special Challenge

Issen counter on screen

Byakue is a secret boss that can only be unlocked by performing 10 Issen during the demo. A counter on the bottom left side of the screen tracks successful Issen executions. Reach 10 and complete the demo to unlock the Special Challenge in the main menu.

Issen demo

Issen is a perfectly timed counterattack that allows Musashi to strike an opponent just before their attack lands. This is a high-risk, high-reward technique that deals lethal damage when executed correctly.

Byakue Attack Patterns

The following table lists each attack Byakue uses in its different forms.

AttackDescription
ChargeCharge
It charges straight toward the player. Parrying or deflecting the attack drains little to no stamina, so evade instead to build up the Reflex Gauge.
Leaping Axe
Strike
Leaping Axe<br /> Strike
Byakue flips forward and plunges its axe into its target. This has an obvious tell and can be countered by an Issen.
Overhead StrikeOverhead Strike
The creature spins its weapon before hacking downward with immense force.
Triple Axe
Combo
Triple Axe<br /> Combo
A triple axe swing is dished out by the boss. The first can be difficult to read due to its tight timing, while the succeeding swings have clearer visible cues.
Spinning SweepSpinning Sweep
It spins 360 degrees before sweeping its axe forward.
Hop & BashHop & Bash
The Oni hops and forcefully bashes the target with its shoulder. Parrying or deflecting both attacks drains no stamina, so evade these instead for a Reflex Combo counter.
Upswing ChargeUpswing Charge
Byakue rushes toward the player before swinging its axe upward.
Hair GrabHair Grab
It whirls it glowing hair before attempting to snatch the player. This can be simply avoided by walking away from the beast.
5-Hit Wild
Swing
5-Hit Wild Swing
Byakue goes on a rampage and unleashes five swings in a row, demolishing anything caught in its path.

How to Beat Byakue

[1] Parry Byakue's attacks for longer vulnerability windows.

Parrying to gain advantage

Some of its attacks have unique parry animations that leave it open longer for counters. Learning to parry is the most rewarding approach for this fight, compared to solely relying on deflections or reflex dodges.

[2] Dodge backward after it charges.

Dodging during the charge attack

Byakue tends to follow up its charge with a quick axe swing or another attack, which can easily catch the player off guard and cost a significant chunk of health. After parrying or deflecting the charge, quickly back away to create some distance. This allows for more time to react to whatever attack comes next.

[3] Perform an Issen during its Leaping Axe Strike.

Performing an Issen to counter an attack

It is difficult to land an Issen against this boss due to its aggressive nature and unpredictable attacks. However, its Leaping Axe Strike has a clear visual cue and much more predictable timing, making it one of the easier attacks to counter with an Issen. Attack just before it lands to deal both heavy HP and stamina damage.

[4] Use the invisibility frames of The Two Celestials.

Using The Two Celestials to avoid an attack

Aside from using The Two Celestials to gain souls for healing, utilize the weapon animation I-frames to extend combos or avoid incoming attacks. Just make sure to draw and absorb enough Blue Souls during combat to keep the weapon available.

[5] Use the Oni Bow to prevent it from regaining stamina.

Using the Oni Bow to attack the boss

While recovering HP or just creating distance, use the Oni Bow to poke the boss and slow down its stamina recovery. This is especially useful for maintaining a Deflection-Break Issen strategy.

Byakue Rewards

Byakue does not drop any rewards after defeat during the Special Challenge event. However, it does drop the following items in the game's full version:

  • Red Soul x 1,000
  • Byakue's Talisman x 2

Related Guides

List of Bosses

Bosses
DEMO

Sasaki Ganryu

Daidara - Slavering Glutton

Byakue -Hundred Defilements
FULL GAME

Rasho-gan - Wish Warper

Ifuu

Greater Nue

Benkei

Burai

Shuten Doji

Ifuu and Burai

Sasaki Ganryu at Arashiyama

Dokyo

Benkei at Rendaino

Minamoto no Yoshitsune

Byakue at Kiyomizu-dera Temple

List of Walkthroughs