Overview
- No character in Demon Slayer matched Yoriichi Tsugikuni’s power level, not even Tanjiro or Muzan.
- Muzan’s defeat necessitated a unified effort and strategic assistance through Lady Tamayo’s drug.
- Tanjiro and the Hashira required multiple advantages to confront Muzan successfully.
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The narrative arc of shōnen anime often culminates with the protagonist achieving sufficient power to rival or even surpass the main antagonist. This trending storyline is evident in many shows where training and determination lead to extraordinary growth. However, in the world of Demon Slayer, Tanjiro Kamado’s evolution, coupled with his mastery of Sun Breathing, does not culminate in him being able to defeat Muzan Kibutsuji single-handedly. The eventual fall of the Demon King was not a solo feat; it was the result of the combined prowess of the Hashira, the unyielding dedication of the Demon Slayer Corps, and the strategic advantage provided by Lady Tamayo’s potent medication. This brings us to an intriguing revelation: was Muzan truly invincible? The unequivocal answer is no; Yoriichi Tsugikuni, the most formidable Demon Slayer in history, remains the only individual capable of standing toe-to-toe with Muzan.
初の漫画は2016年のウェブ・シェイプの「週刊少年ジャンプ」への登場以降、Koyoharu Gotougeの Demon Slayer: Kimetsu no Yaiba は2020年に終了し、全23巻を誇ります。2019年4月に制作されたアニメは瞬く間にグローバルなブームを巻き起こし、圧倒的なアニメーション、感情的なストーリーテリング、そして息を呑むアクションシーケンスが融合されることで、現代の少年漫画に新たな基準を打ち立てました。その未曾有の成功は、アニメ映画『劇場版「鬼滅の刃」無限列車編』が歴史上最も興行収入の高いアニメ映画となったことで、アニメ界にその地位を確立しました。
Spoiler Alert: このパートでは、『Demon Slayer: Kimetsu no Yaiba』の主要なストーリー展開、特にムザンとの最終戦の重要なポイントに関する大きなネタバレが含まれています。シリーズが完結していない場合は、ご注意ください!
How Powerful Was Muzan Kibutsuji?
The Strength of the Demon King


Muzan Kibutsuji, the very progenitor of all demons, epitomized a nearly invincible force. His mere existence struck terror into the hearts of others, including his henchmen. As the Demon King, Muzan had the ability to effortlessly eliminate numerous skilled Demon Slayers and contend against multiple Hashira simultaneously. His strength was so formidable that even the marked Hashira, which usually exhibited enhanced abilities, struggled against him.
The Four Stages of Muzan’s Weakening

It was only through tactical degradation that Muzan was ultimately defeated, with critical dependence on a drug developed by Lady Tamayo that systematically weakened him in four pivotal stages:
Stage |
Effect |
---|---|
Aging Acceleration |
Significantly aged Muzan’s cells, resulting in drastically diminished stamina and impaired regeneration. |
Prevention of Splitting |
Prevented Muzan from fragmenting his body into thousands of pieces to escape. |
Human Conversion |
Attempted to revert Muzan back to human form, which weakened him further. |
Cellular Destruction |
Induced irreversible damage to his cells, impeding his rapid healing capabilities. |
Despite these calculated disadvantages, Muzan still posed an immense challenge for the Demon Slayer Corps. Without these tactical advantages, his overwhelming might would likely have led to the swift annihilation of the Hashira and the Kamado siblings.
Yoriichi Tsugikuni: The Only True Rival to Muzan
The Strongest Demon Slayer in History

The sole individual known for confronting Muzan on equal terms is Yoriichi Tsugikuni, renowned as the founder of Breathing Styles and the greatest Demon Slayer in existence. Yoriichi was a unique prodigy, gifted with the Demon Slayer Mark and exceptional mastery over the art of swordsmanship, far surpassing any other character in the series.
His legendary duel against Muzan was unlike any other. Whereas Tanjiro and others depended on a variety of advantages, Yoriichi nearly vanquished the Demon King in a one-on-one combat scenario. He quickly devised a technique to effectively attack all of Muzan’s critical vitals—his seven hearts and five brains—in a singular offensive move. In a stunning exhibition of skill, Yoriichi outmatched Muzan completely, leaving the Demon King no method of counteraction, ultimately forcing him to evade by dissipating into thousands of particles.
This confrontation permanently impacted Muzan, leaving him with deep psychological and physical scars. The Demon King, responsible for the demise of countless Demon Slayers, was left so traumatized by the encounter that he lived in fear of facing such a challenger again. Even after Yoriichi’s passing, the mere sight of Yoriichi’s Hanafuda earrings would instill dread in Muzan.
The True Power Ceiling of Demon Slayer

In the climactic moments of Demon Slayer, no character, including Tanjiro, ascended to the power levels exhibited by Yoriichi or a prime Muzan. Although Tanjiro inherited the Sun Breathing technique from Yoriichi, he never achieved the same level of proficiency. The established power ceiling of Demon Slayer, determined centuries earlier, placed both Yoriichi and Muzan in a category entirely of their own.
- No Demon Slayer after Yoriichi matched his immense power.
- Even Muzan, the ultimate opponent, never fully recuperated from his encounter with Yoriichi.
- Tanjiro and the Hashira required numerous advantages to stand a chance against him.
In summary, while Tanjiro served as the hero throughout the series, he never truly rivaled Muzan. That distinction exclusively belongs to Yoriichi Tsugikuni—the only warrior capable of challenging the reign of the Demon King with any prospect of success.