kokushibo

Kokushibo uses the Breath of the Moon, one of the most dangerous in the world. Shinazugawa Sanemi noted that when Kokushibo swings his sword using this style, he surrounds the opponent with chaotic, crescent-shaped movements that constantly change size and length, thereby increasing the range of damage.
First Style: Dark Moon: Evening Shrine - Kokushibo makes a quick attack with his katana, and several crescent moons appear in the trajectory of the cut.
Second Style: Moon Pearl Flowers - Kokushibo creates upward vertical slices around himself.
Third Style: Hateful Moon: Chains - Kokushibo makes many chaotic cuts in front of him.
Fifth Style: Ghost Moon Destruction Whirlwind - Kokushibo creates multiple curved slices layered on top of each other, resembling an ascending whirlwind. Numerous chaotic blades emanate from these slices. Kokushibo performed this attack without swinging his sword.
Sixth Style: Lonely Moon in Avichi's Endless Night - Kokushibo unleashes a wild storm of blades in many directions. This technique was powerful enough not only to cut through the pillars around him but also to suppress Sanemi Shinazugawa's Wind Pillar.
Seventh Style: Lonely Moon in the Endless Night of Avichi - Kokushibo creates several earth-rending slashes in front of him.
Eighth Style: Moon Ouroboros - Kokushibo performs a wide-range circular attack.
Tenth Style: Cut: Moonlight shining through bamboo leaves
Fourteenth Style: Disaster - Immortal Proud Crescent - a multitude of horizontal slashes surrounding Kokushibo in such a way that it cannot be approached
Style Sixteen: Rainbow Crescent - vertical attacks that crush the ground.

Flesh Sword (Kekkijutsu, Kekkijutsu): While the specific name of the Blood Demon Technique is unknown, Kokushibo reveals that he separated a portion of his own flesh and fashioned it into the katana he uses in combat. The blade possessed multiple eyes within the blade, hilt, and guard, allowing him to have an extended range of vision when wielding it in combat. Because the blade was also created from his flesh, it could easily regenerate if destroyed or shattered. This ability is demonstrated when the blade reverts to its original form in the battle with Gyomei. Kokushibo also demonstrated the ability to freely manipulate the blade's shape, growing three additional blades from the original blade to extend its reach and further increase its size. Later, Kokushibo also demonstrated the ability to grow and extend multiple blades from his body, allowing him to deliver multiple strikes without hesitation. This attack was powerful enough to easily repel two Hashira and destroy Genya Shinazugawa's Blood Demon Technique, as well as bisect numerous columns in a room with just its activation. However, the full power of this technique is unknown. Flesh Sword - Kokushibo reveals that he separated a portion of his flesh and shaped it into the katana he now wields. The sword is studded with eyes on the blade, hilt, and guard, increasing its range in combat. Furthermore, since the sword is crafted from Kokushibo's flesh, the blade easily regenerates damage. This ability was demonstrated when the blade returned to its original form during his fight with Gyomei Gimejima. Kokushibo later freely altered the sword's form, growing three additional blades to increase its reach. He can also grow blades from his body.

Enhanced Regeneration: Kokushibo possessed incredible regeneration, able to regenerate his right arm after Gyomeyo sliced ​​it open. Later, after being decapitated by two of the Hashira, Kokushibo was able to regenerate his entire head, successfully overcoming the weakness of all demons—death by decapitation. However, this process took longer than Muzan's and was more unstable than Akaza's, resulting in him assuming a monstrous form.
Demonic Transformation: Later, after growing a head during his battle with Gyomei and Sanemi, Kokushibo was able to transform into a monstrous, spider-like form that supposedly enhances all of his abilities.
Telepathic Communication: Kokushibo can be telepathically linked with Muzan thanks to his massive amount of blood, allowing him to have full conversations with the demon lord.

Demonic abilities
Enhanced Speed: Kokushibo possessed an immense level of speed, as demonstrated when he easily outpaced Muichiro's breathing techniques. Muichiro himself stated that Kokushibo's speed was on a different dimension than that of the Hashira.
Durability: Kokushibo has demonstrated immense physical resilience, as demonstrated when, despite Gyomei using both a mace and an axe to attack his neck, he still remained motionless. His neck was only severed thanks to the combined efforts of Gyomei and Sanemi.
Strength and Reflexes: As a user of a special breath, Kokushibo possesses superhuman strength and reflexes. After becoming a demon, he gained additional advantages thanks to his demon blood.
Demon Slayer's Mark: Kokushibo bears a mark similar to that of some "awakened" Demon Slayers, resembling a Demon's crest. Its specific abilities are unknown, but it is known to greatly enhance a Demon Slayer's abilities, making them much stronger, faster, and more reactive than they normally would be, though at the cost of a curse that prevents him from living past 25 years of age. As a Demon, Kokushibo was not affected by the mark's curse.
Transparent World (透すき通とおる世せ界かい Sukitōru Sekai): Kokushibo gained the ability to see the "transparent world" through the use of three pairs of eyes. This grants him superhuman kinetic vision similar to Kanao Tsuyuri, allowing him to see the muscles, blood flow, and joint movements of his opponents. He can accurately predict and anticipate his opponents' movements and attacks with this ability. He was also able to identify Muichiro as his descendant, immediately recognize the skill level of Muichiro, Sanemi, and Gyomei with a single glance, and learned that Genya Shinazugawa consumed demons to gain strength by studying his cellular structures.

Kokushibo was an extremely powerful swordsman, considered the strongest of the Twelve Moons Demons and the second strongest Demon in the series, after Muzan Kibutsuji. As one of the oldest demons in the series, he had fought numerous demon hunters and gained vast experience and knowledge in combat. He was able to easily decipher the techniques and skills of at least two Hashira and crush them in combat. As a breath user, he possessed high levels of strength and reflexes, further enhanced by his Demon physiology.
Kokushibo's combined abilities and skills allowed him to defeat two Hashira with minimal effort and then fight on par with Gyomei, considered the most powerful Demon Slayer in the Corps. Even when Gyomei and Sanemi awakened their Demon Slayer Marks, which increased their physical abilities far beyond their limits, he was still capable of confronting both of them simultaneously.
As he began to draw on his power, Kokushibo managed to overwhelm both Gyomei and Sanemi, both of whom were enhanced by their Demon Slayer Marks. As a testament to his power, it ultimately took a combined attack from Gyomei, Sanemi, and Muichiro to seriously injure him. Ultimately, Kokushibo's death was primarily the result of his sudden inability to regenerate, and he began to collapse due to the realization of his own error, not the skill of his opponents.

Kokushibo's real name before meeting Muzan was Michikatsu Tsugikuni.
He was born along with his younger brother, Yoriichi, during the Sengoku period. His family was of high rank. Their father decided to make Michikatsu his heir when he turned 10 and send Yoriichi to the temple. Michikatsu felt sorry for his younger brother, but he was not allowed to approach him. Nevertheless, he approached him and presented him with a homemade flute. This earned him a punch in the face.
When they were both seven years old, Yoriichi asked Michikatsu to try his hand at fencing. Michikatsu was amazed by Yoriichi's skill. Yoriichi defeated his teacher in just a few moves. From then on, Michikatsu despised and envied Yoriichi's talent. When he learned that Yoriichi constantly picked on his mother's weak spot, his hatred grew.
Having learned of Yoriichi's talents, his father decided to make him his heir. Yoriichi ran away from home after his mother's death. Ultimately, he was never found, and Michikatsu became the heir.
Before meeting Muzan, Kokushibo was a human and one of the most powerful demon hunters. He lived during the Sengoku period and honed his swordsmanship with a former wind breath user. It is also known that Kokushibo was familiar with the Wind Pillar. He later fathered a child who continued his lineage. It is unknown when exactly he became a demon and joined the Twelve Demon Moons, but the impetus for this decision was the realization that those with the mark do not live past the age of 25. Sixty years later, on the night of the blood moon, he met his brother, Yoriichi Tsugikuni, who nearly cut off his head, but died of old age at the last moment.
Three hundred years ago, Kokushibo encountered a demon hunter who ate demon flesh to increase his powers. Kokushibo defeated him by cutting him in half.

Appearance
As a demon, Kokushibo is a pale-skinned, tall, and muscular man with long, spiky black hair with red tips, tied back in a ponytail. His most notable feature is the three pairs of eyes on his face, each with yellow irises and red sclerae, each with a black, straight slit extending from each iris. His middle set of eyes bears the kanji for "Highest Rank (上じょう弦げん, Jōgen?)" and "One (壱いち, Ichi?)". Kokushibo also has red flame-like markings on the upper left side of his forehead and the lower right side of his chin. The Mist Pillar, Muichiro Tokito, described his appearance as extremely majestic.
Kokushibo wears a purple and black nagagi kimono shaped like a beehive and a black hakama in the Umanori style with a white Uwa obi. He wears a flesh sword with eyes in the space between the tsuka tsuka ito. It is later revealed that the tsuba and blade have eyes and veins.

As a human, Kokushibo's appearance was nearly identical to his demon form, save for the number of eyes, prominent eyebrows, and noticeably less pale skin. His eyes had dark purple irises and normal white sclera, like a human's. As a child, he wore a white kimono, not the purple-and-black patterned one he wore as an adult.
Kokushiba's character is a complex blend of strict samurai honor, deep bitterness, and internal conflict. He is silent, intimidating in his presence, and can frighten with just his gaze...

Height:
190 cm
Weight:
93 kg
Affiliation:
Demons of the Twelve Moons
Occupation:
First Upper Moon
Fighting style:
Breath of the Moon
Kokushiba's phrase and manner of speaking: It's terrible not to admit defeat, even though they took my head, chopped it off, and crushed it. To live in shame. Is this what I lived for hundreds of years? Was I so afraid of defeat that I became a monster? Did I want to be strong, even if it meant eating people? Did I become this pathetic creature because I didn't want to die? No, Yoriichi... I just wanted to be you.
Kokushibo (黒死牟 Kokushibo) is the main secondary antagonist of Demon Slayer Blade: Kimetsu no Yaiba and Upper Moon One.
Nearly five centuries ago in the Sengoku Period, during the Golden Age of Demon Slayers, Kokushibo was a man named Michikatsu Tsugikuni (継つぎ国くに 巌みち勝かつ, Tsugikuni Michikatsu?) and a former member of the Demon Slayer Corps[2] and the older twin brother of Yoriichi Tsugikuni,[3] the strongest demon slayer to ever live.

Kokushibo is also the ancestor of Muichiro Tokito and Yuichiro Tokito[4] and is responsible for Kaigaku's transformation into a demon and joining the Upper Ranks.