Who Killed Kokushibo in Demon Slayer?

by Hazel

The epic manga and anime series “Demon Slayer: Kimetsu no Yaiba,” created by Koyoharu Gotouge, has mesmerized fans worldwide with its rich storytelling, intricate characters, and breathtaking battles. Among the many formidable antagonists in the series, Kokushibo stands out as one of the most powerful and complex demons. As Upper Moon One of the Twelve Kizuki, Kokushibo’s eventual defeat marks a significant turning point in the story. This article provides an in-depth analysis of Kokushibo’s final battle, exploring the characters involved, the strategies employed, and the significance of his demise, and therefore, solve the question of Who Killed Kokushibo in Demon Slayer.

Understanding Kokushibo

Origins and Backstory

Kokushibo, originally known as Michikatsu Tsugikuni, was a human samurai who lived during the Sengoku era. He was the older twin brother of Yoriichi Tsugikuni, the legendary swordsman and creator of the Breath of the Sun technique. Despite being a powerful warrior in his own right, Michikatsu harbored deep envy towards his brother’s unparalleled abilities and natural talent. His ambition led him to become a demon, taking the name Kokushibo, and serving Muzan Kibutsuji as Upper Moon One. Kokushibo’s transformation into a demon granted him immense power and extended his life, but it also deepened his internal conflict and sense of loss.


Powers and Abilities

As Upper Moon One, Kokushibo possessed extraordinary strength, speed, and regenerative abilities. He wielded a unique blood demon art that allowed him to create and manipulate multiple blade-like structures from his body. His mastery of the Moon Breathing technique, a derivative of his brother’s Sun Breathing, made him a formidable opponent even among demons. Kokushibo’s six eyes, which enhanced his perception and combat prowess, further solidified his status as one of the most dangerous adversaries in the Demon Slayer Corps’ history.


The Final Battle

Prelude to the Conflict

Kokushibo’s final battle takes place during the Infinity Castle arc, a climactic part of the “Demon Slayer” story where the Demon Slayer Corps launches an all-out assault on Muzan Kibutsuji’s fortress. The battle against Kokushibo is one of the most intense and significant confrontations in the series, involving several key members of the Demon Slayer Corps.


Key Participants

The primary fighters who engage Kokushibo in his final battle are:


Gyomei Himejima: The Stone Hashira and the strongest Hashira in terms of physical strength.

Sanemi Shinazugawa: The Wind Hashira, known for his aggressive fighting style and unyielding spirit.

Muichiro Tokito: The Mist Hashira, a young prodigy with a calm demeanor and exceptional skill.

Genya Shinazugawa: Sanemi’s younger brother, who possesses unique abilities that allow him to consume demon flesh and gain their powers temporarily.

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The Battle Unfolds

The battle against Kokushibo is marked by intense action, strategic maneuvers, and moments of profound emotional weight. Each of the Demon Slayers brings their unique abilities and techniques to bear against Kokushibo, resulting in a series of fierce exchanges.

Gyomei Himejima’s Strength

Gyomei Himejima, as the strongest Hashira, plays a crucial role in the battle. His physical strength and mastery of the Stone Breathing technique allow him to hold his ground against Kokushibo’s relentless attacks. Gyomei’s use of his massive chained weapon, the kusarigama, proves instrumental in both offense and defense, creating openings for his fellow Demon Slayers to exploit.

Sanemi Shinazugawa’s Ferocity

Sanemi Shinazugawa’s aggressive fighting style and unyielding spirit complement Gyomei’s strength. Sanemi’s Wind Breathing techniques enable him to deliver swift and powerful strikes, pushing Kokushibo to his limits. Sanemi’s resilience and determination, driven by his deep-seated hatred for demons, fuel his relentless assault, creating further opportunities for his comrades.

Muichiro Tokito’s Precision

Muichiro Tokito’s calm demeanor and exceptional skill with the Mist Breathing technique add a layer of precision to the battle. Despite his young age, Muichiro’s talent and strategic thinking allow him to exploit Kokushibo’s weaknesses. His ability to remain composed under pressure and deliver precise, calculated attacks proves crucial in the coordinated effort to defeat Kokushibo.

Genya Shinazugawa’s Unique Abilities

Genya Shinazugawa’s unique ability to consume demon flesh and temporarily gain their powers adds an unpredictable element to the battle. Genya’s regenerative abilities and enhanced strength, acquired through his consumption of demon flesh, enable him to support his comrades in crucial moments. His willingness to put his life on the line and his unbreakable bond with his brother Sanemi underscore the emotional stakes of the confrontation.

The Turning Point

The battle reaches its turning point when the combined efforts of the Demon Slayers begin to wear down Kokushibo. Despite his immense power and regenerative abilities, Kokushibo finds himself pushed to the brink by the relentless assault. The synchronized attacks and unwavering determination of Gyomei, Sanemi, Muichiro, and Genya create a synergy that even Kokushibo cannot withstand indefinitely.

The Final Blow

The decisive moment comes when Gyomei Himejima and Sanemi Shinazugawa deliver a coordinated attack that exploits Kokushibo’s weakened state. Gyomei’s immense strength and Sanemi’s precision allow them to land a critical blow, severing Kokushibo’s head. However, due to Kokushibo’s powerful regeneration, this alone is not enough to kill him.

In a final act of desperation, Kokushibo attempts to regenerate and continue the fight. It is at this moment that Muichiro Tokito and Genya Shinazugawa make their ultimate sacrifice. Muichiro, already grievously wounded, channels his remaining strength to immobilize Kokushibo, while Genya, utilizing his demon-enhanced abilities, delivers the final strike. The combined effort of the Demon Slayers, their willingness to sacrifice everything, and their unwavering resolve ultimately lead to Kokushibo’s demise.

Significance of Kokushibo’s Death

Thematic Resonance

Kokushibo’s death carries significant thematic weight in the narrative of “Demon Slayer: Kimetsu no Yaiba.” His demise represents the triumph of human determination and solidarity over the seemingly insurmountable power of demons. The battle underscores the themes of sacrifice, brotherhood, and the enduring human spirit, which are central to the series.

Character Development

The defeat of Kokushibo also marks a pivotal moment in the development of the characters involved. Gyomei Himejima and Sanemi Shinazugawa’s roles in the battle highlight their strength and resolve, while Muichiro Tokito and Genya Shinazugawa’s sacrifices underscore their growth and dedication. The battle against Kokushibo serves as a crucible, forging the characters’ bonds and solidifying their commitment to their cause.

Impact on the Story

Kokushibo’s death has profound implications for the overall story of “Demon Slayer.” As Upper Moon One, Kokushibo’s defeat weakens Muzan Kibutsuji’s forces and signals a turning point in the war between demons and Demon Slayers. The victory over such a formidable foe galvanizes the Demon Slayer Corps and sets the stage for the final confrontation with Muzan Kibutsuji.


The battle against Kokushibo in “Demon Slayer: Kimetsu no Yaiba” is one of the most intense and emotionally charged conflicts in the series. The combined efforts of Gyomei Himejima, Sanemi Shinazugawa, Muichiro Tokito, and Genya Shinazugawa ultimately lead to Kokushibo’s defeat, highlighting the themes of sacrifice, brotherhood, and the triumph of the human spirit. Kokushibo’s death marks a significant turning point in the narrative, paving the way for the final showdown with Muzan Kibutsuji and the resolution of the series’ central conflicts. Through their courage, determination, and unwavering resolve, the Demon Slayers demonstrate that even the most powerful adversaries can be overcome when united by a common cause.


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