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“ | I could never grab hold of anything. Anything at all. I abandoned my home. I abandoned my wife and children. I abandoned my humanity. I cut down my descendants and abandoned being a samurai. But even all that wasn't enough? You said that those who master their paths all reach the same place. But I never did. I could not see the same world that you did. Why could I not leave anything behind? Why could I not become someone known? Why are we so different? Why in the world was I ever born? Tell me... Yoriichi. | „ |
~ Kokushibo's final moments |
“ | You merely shredded my kimono, not even enough to kill an infant. Once I dispatch you two, the rest will proceed easily. | „ |
~ Kokushibo as he revealed his evolved blade |
“ | Be thankful for the blood... You are not allowed to spill even a single drop on the ground... for if you do... your torso and head shall have a sorrowful parting. | „ |
~ Kokushibo to Kaigaku |
Background

Kokushibo (黒死牟) is the secondary and a crucial supporting antagonist of the animanga series Demon Slayer: Kimetsu no Yaiba. Kokushibo is the Upper Rank One of the Twelve Kizuki, and the archenemy of his younger twin brother, Yoriichi Tsugikuni.
it was also revealed that Kokushibo is also the ancestor of Yuichiro Tokito and the Mist Hashira, Muichiro Tokito, before becoming the strongest of the Upper Ranks and the right-hand man of Muzan Kibutsuji.
His real name is Michikatsu Tsugikuni (継国 巌勝) who is the elder brother of the first Sun Breathing user, Yoriichi Tsugikuni, and it's speculated that Kokushibo is also a member of the Breathing Styles User because of his skills and the fact that Kokushibo created his own breathing style derived directly from Sun Breathing, Moon Breathing.
Powers and Stats
Tier: 8-A
Dimensionality: 3-D
Superhuman Physical Characteristics, Accelerated Development (Demons grow at superhumanly fast rates, dependent on the number of humans they have consumed and the amount of Muzan Kibutsuji's blood they have assimilated), Absorption (Kokushibo possesses the ability to absorb human and demon bodies through physical contact. Although this trait has never been displayed, its stated that Kokushibo would absorb the demons that challenged him and were defeated), Self-Sustenance (Type 3; Demons are capable of not sleeping as they practically possess infinite stamina and do not feel tired), Regeneration (High-Mid; Demons possess have incredible regenerative abilities; being able to regenerate any sort of physical injury in mere seconds, including deep cuts, organs, chunks of flesh, entire limbs or even their head and entire body. Kokushibo is able to regenerate his head from nichirin weapon unlike other demons), Immortality (Type 2, 3; All demons have a shared physical trait of endless and limitless stamina and vitality, simply being unable to accumulate fatigue or get tired no matter how hard they try to exert themselves; being unable to feel pain or exhaustion. All demons are able to heal any sort of physical injury in mere seconds, including deep cuts, organs, chunks of flesh, entire limbs or even their head and entire body), Telepathy (Demons possess the ability to disseminate and transmit information to one another through psychic means.), Longevity, Enhanced Senses (Kokushibo can detect presences of others outside of his range of perception, as shown when he dodged Genya's gunshots and appeared directly behind him despite Kokushibo not looking at Genya at all), Body Control & Weapon Creation (Like all demons, Kokushibo possesses the ability to manipulate his own flesh; manipulating a detached part of his body in the form of his katana; can freely manipulate the form of the blade, shown when he grew three additional blades from the original blade to increase its reach and further increase its size; Later, Kokushibo also displayed the ability to grow and protrude multiple blades from his own body, allowing him to perform a multitude of slashes from them without a swinging motion), Weapon Mastery, Supernatural Willpower, Empowerment, & Adaptation (Possesses a superhuman willpower and an indomitable spirit. When he was about to get killed, he forced his regeneration to evolve, and regrew his own head along with a myriad of enhancements, all because he didn't allow himself to die until he accomplished his goal.), Overwhelming Aura, Fear Manipulation & Paralysis Inducement (Possesses a menacing and overwhelming presence that made Muichiro, a Hashira who has defeated countless demons in the past, lose the will to fight and caused his body to tremble uncontrollably), Transformation (Able to transform himself into a more monstrous form with several appendages on his back that enhanced all of his abilities and powers), Statistics Amplification, Shockwave Creation (Able to generate shockwaves with powerful sword slashes which extend his range of attack), Danmaku via Blood Demon Art (Can create dozens of blades shaped like a crescent moon that constantly change in size, length and speed)
- Transparent World (Passive): Enhanced Perception & Precognition (Type 1; Could perceive the bodily structures and see through the bodies' of his opponents and use this information to predict their attacks and movements.), Information Analysis (Able to trace back the heritage of a young child back to his own bloodline with a simple glance. He's also able to immediately determine how strong his opponents are by looking at their muscles and bodily structure.), Extrasensory Perception (Outside of his vision, Kokushibo also seems to be able to keep track of the locations of his peers around the Infinity Castle, evident as he no longer felt Akaza's presence when he died)
Attack Potency: Multi-City Block level (Kokushibo is an immensely powerful demon, that is given the title of the Upper Moon 1, being recognized to be the strongest of the Twelve Kizuki, as such he is far much stronger than Doma.)
Speed: Massively Hypersonic (Possessed extraordinary levels of speed, far surpassing that of all the other Upper Rank Kizukis, as shown when he slashed off Akaza's arm before he, or likely any of the other Upper Rank demons present, realised. Tremendously faster than any Hashira and Demon Slayer presented)
Lifting Strength: Class K (Kokushibo has displayed immense physical strength, lifting a gigantic sword much heavier than a regular katana and swinging it incessantly at speeds faster than the eye can see without rest or much effort. Should be comparable, if not superior, to Rengoku)
Durability: Unknown with his body, Multi-City Block level with his neck (Shown monstrous physical durability as seen when despite Gyomei and Sanemi using their all, Gyomei using both his flail and axe to attack both ends of his neck, it still didn't budge)
Stamina: Due to being a Demon, he possesses absolute and infinite stamina and vitality, never tiring and always remaining in optimal physical and mental condition all the time as well as being able to endure waves of onslaught as if it were nothing.
Range: Extended Melee Range, Varies with his techniques, possibly up to Hundreds of Meters with Fourteenth Form: Calamity: Heaven's Full Crescent Moon (Possess an ability that allows him to manipulate the shape and range of his sword slashes when unleashing his Moon Breathing techniques; seemingly able to control said slashes to a certain extent, increasing their range and shape to attack his target in impossible ways under normal circumstances; displaying the ability to exponentially increase the range of his sword slash with his Moon-Dragon Ringtail technique)
Intelligence: As a talented swordsman who has existed for over four centuries, Kokushibo has experienced countless battle situations and threats which he has learnt to overcome and circumvent.
Weaknesses: Due to being a Demon, sunlight would reduce him to ashes.
Notable Attacks/Techniques:
- First Form: Dark Moon, Evening Palace 「壱ノ型 闇月・宵の宮」 - Kokushibo quickly draws his sword and slashes swiftly in a singular horizontal motion in a crescent shape, creating numerous chaotic crescent blades. This technique is extremely reminiscent of Iaijutsu.
- Second Form: Pearl Flower Moongazing 「弐ノ型 珠華の弄月」 - Kokushibo performs several crescent-shaped slashes that defend him from incoming attacks, sending a barrage of crescent blades.
- Third Form: Loathsome Moon, Chains 「参ノ型 厭忌月・銷り」 - Kokushibo swings his sword rapidly in two gigantic crescent slashes, from which a storm of smaller crescents spread, causing huge destruction in a small area.
- Fifth Form: Moon Spirit Calamitous Eddy 「伍ノ型 月げ魄災渦」 - Kokushibo makes multiple curved slashes layered over one another, creating a rising vortex of sword slashes and crescent moon blades.
- Sixth Form: Perpetual Night, Lonely Moon - Incessant 「陸ノ型 常夜孤月・無間」 - Kokushibo releases a wild barrage of crescent-shaped slashes several meters in front of him. This technique was powerful enough to overwhelm Sanemi Shinazugawa and so long-ranged that it slices up the surrounding pillars.
- Seventh Form: Mirror of Misfortune, Moonlit 「漆ノ型 厄鏡・月映え」 - Kokushibo swings the gigantic version of his sword in a powerful frontal crescent-shaped slash that creates powerful multi-directional long-ranged slashes in the ground.
- Eighth Form: Moon-Dragon Ringtail 「捌ノ型 月龍輪尾」 - Kokushibo uses the gigantic version of his sword and creates a singular gigantic crescent-shaped slash that slowly decreases in size, creating dozens of crescent moon blades.
- Ninth Form: Waning Moonswaths 「玖ノ型 降り月・連面」 - Kokushibo creates a stream of long-ranged crescent-shaped vertical and horizontal slashes along with numerous crescent moon blades with the gigantic version of his sword.
- Tenth Form: Drilling Slashes, Moon Through Bamboo Leaves 「拾ノ型 穿面斬・蘿月」 - Kokushibo creates a long-ranged triple-layered slash twister full of crescent moon blades with the gigantic version of his sword.
- Fourteenth Form: Catastrophe, Tenman Crescent Moon 「拾肆ノ型 兇変・天満繊月」 - Kokushibo uses the gigantic version of his sword and creates a chaotic vortex of powerful extremely long-ranged omni-directional slashes that destroys whatever is caught up within its attack radius.
- Sixteenth Form: Moonbow, Half Moon 「拾陸ノ型 月虹・片割れ月」 - Kokushibo creates a barrage of downward crescent slashes from an extremely long and wide range, resulting in a powerful six-fold slash crashing down on his opponents; the attack itself is powerful enough to create several miniature craters where the slashes have landed.
Others
Notable Victories:
Notable Losses:
Inconclusive Matches: