Chapter Summaries

Uchiha Kazama completed his mission in the Jujutsu Kaisen World and was automatically transferred to the Demon Slayer World before he could recruit anyone. Moryo told him that enough soul origin could let him return to Moryo’s world and, if he located it, the Shinobi World as well.

• The system completed Uchiha Kazama’s mission and automatically activated a World Transfer Stone, which the Will of the Jujutsu Kaisen World could not stop.
• Chtholly slapped Gojo Satoru and vanished after Uchiha Kazama left, while Toji Fushiguro revived and Itadori regained control of his body after Sukuna was beaten unconscious.
• Uchiha Kazama complained that he had left the Jujutsu Kaisen World without recruiting anyone, and the system announced his transfer to the Demon Slayer World.
• Moryo told Uchiha Kazama that replenishing his world with soul origin could let him return there and that locating the Shinobi World would let him go back to it.
• Uchiha Kazama considered gathering potential recruits in the Demon Slayer World, including Rengoku and Butterfly.

Uchiha Kazama arrived in the forest during the battle against Upper Rank Four and healed Tanjiro, urging him to fight decisively. As the Demon Slayer Corps suffered heavy losses, Kazama avoided intervening directly and encountered Mitsuri Kanroji as she hurried toward the battle.

• Uchiha Kazama found the wounded Tanjiro and recognized that the battle involved Upper Rank Four.
• Kazama healed Tanjiro, restored his battle insights, and sent him back to fight with a warning to be more decisive.
• Kazama observed Zohakuten, the Cowardice Demon, the Hatred Demon, Genya Shinazugawa, and Mitsuri Kanroji gathering around the battle.
• Kazama asked the system whether the Will of the World would attack him, and learned it would not unless he tried to seize the world's origin.
• As Mitsuri raced through the forest, she sensed Kazama's presence and drew her weapon; Kazama told her he meant no harm and warned her not to disturb Tanjiro.

Uchiha Kazama met Mitsuri Kanroji and promised to help the Demon Slayer Corps without fighting the demons himself. He guided Tanjiro through a new way of using Fire Release with his breathing technique, leaving Tanjiro charging toward Zohakuten.

• Uchiha Kazama confessed to Mitsuri Kanroji, offered to help the Demon Slayer Corps, and told her he could remove Muzan Kibutsuji's influence from demons.
• Uchiha Kazama took Mitsuri Kanroji to watch Tanjiro fight Zohakuten and spoke to Tanjiro, encouraging him to focus on defeating his enemy.
• Tanjiro explained his plan to Uchiha Kazama, who discussed its weaknesses with Mitsuri Kanroji and adjusted Tanjiro's breathing technique.
• Tanjiro used Fire Release to sever a Wood Dragon's head, then charged forward with Flame Dash and cut down the surrounding Wood Dragons as he closed in on Zohakuten.

Uchiha Kazama helped Tanjiro defeat Zohakuten and killed the Hatred Demon, then returned with the survivors to find the Swordsmith Village devastated. He healed injured Corps members and began creating houses so they could recover, while Mitsuri watched in amazement.

• Tanjiro severed Zohakuten’s neck after Kazama helped him master a special breathing method, but Zohakuten escaped.
• The Hatred Demon attacked Kazama, who cut him apart with Wind Release: Nameless Whisper and killed him instantly.
• Tanjiro told Kazama about the battle and asked him to teach others the breathing method and cure his demon sister.
• Kazama returned to the ruined Swordsmith Village, cleared the demon influence from Genya Shinazugawa, and asked for the wounded to be brought to him.
• Kazama saw that over a hundred Corps members were badly injured and more than three hundred had serious wounds, then created houses from the ground to shelter them.

Uchiha Kazama healed the Demon Slayer Corps members with extraordinary speed and then let Mitsuri Kanroji take him to rest. Three hours later, he woke to find Mitsuri beside his hand.

• Uchiha Kazama healed the mortally wounded Yonezu Uewa, who recovered and went to help the others.
• Muichiro Tokito watched in shock as Uchiha Kazama restored the injured Demon Slayer Corps members and removed demonic energy from their wounds.
• Mitsuri Kanroji brought over more injured members, and Uchiha Kazama finished treating everyone by sunrise.
• Mitsuri Kanroji pulled Uchiha Kazama into a room, undressed him, told him to rest, and left.
• Uchiha Kazama slept for three hours, then woke and realized Mitsuri Kanroji was beside him.

Uchiha Kazama experimented with breathing to accelerate chakra accumulation while Mitsuri Kanroji rested. At Demon Slayer Corps headquarters, Kagaya Ubuyashiki sent Giyu Tomioka and Butterfly Shinobu to the Swordsmith Village, while Muzan Kibutsuji summoned Gyokko and Hantengu to report their intelligence.

• Uchiha Kazama used a Shadow Clone to prepare food, then tested breathing techniques and found they could speed up his chakra accumulation.
• Mitsuri Kanroji woke hungry, and Uchiha Kazama told her to eat before he went to take a bath.
• Kagaya Ubuyashiki told Yu to summon Giyu Tomioka and Butterfly Shinobu and send them to the Swordsmith Village.
• Akaza argued with Doma, then unleashed his Blood Demon Art until Kokushibo suppressed him; Akaza punched Doma before sitting down.
• Muzan Kibutsuji arrived at the Infinity Castle and asked Gyokko and Hantengu to report what they had learned.

Muzan learned that a mysterious swordsman had effortlessly defeated Hantengu’s clones and sent three Upper Ranks to investigate. At Swordsmith Village, Mitsuri told Uchiha Kazama she wanted to have his child, while the demons and Hashira headed toward the village.

• Hantengu told Muzan that a powerful boy had killed his clones instantly and could heal Demon Slayers’ injuries.
• Akaza, Doma, and Kokushibo volunteered to pursue the mysterious enemy, and Muzan ordered them to go and not return if they failed.
• Butterfly Shinobu teased Giyu Tomioka as they traveled together toward Swordsmith Village.
• Uchiha Kazama relaxed in his bath at Swordsmith Village while Mitsuri Kanroji shyly asked to have his baby.
• The three Upper Ranks and the Hashira traveled toward Swordsmith Village as Kazama and Mitsuri became intimate.

Uchiha Kazama repelled Muichiro Tokito after Muichiro confronted him about Mitsuri and his power. He offered to turn Nezuko back into a human, then trapped Muichiro in an intense illusion that left him shaken when Tanjiro called out.

• After leaving Mitsuri, Uchiha Kazama caught Muichiro Tokito's blade and blasted him away with Shinra Tensei.
• Tanjiro arrived and pleaded for Kazama to spare Muichiro, then eagerly agreed to bring Nezuko so Kazama could restore her humanity.
• Muichiro returned after overhearing Kazama's offer and grew hostile at the thought of him helping Nezuko.
• Kazama threatened to train Muichiro, overwhelmed him with killing intent, and trapped him in an illusion of endless battle.
• Tanjiro's voice broke Muichiro's immersion, and Muichiro realized how rude he had been to Kazama.

Uchiha Kazama purified Nezuko, restoring her ability to speak and endure sunlight, and Tanjiro gratefully thanked him. Kazama then approached the Swordsmith Village chief to propose a trade, offering to kill an Upper Rank Demon in exchange for learning about their sword-forging techniques.

• Uchiha Kazama used Purification to remove the blood controlling Nezuko and keeping her from withstanding sunlight while preserving her strength.
• Nezuko returned to her normal size, removed her bamboo muzzle, and embraced Tanjiro while calling him her brother.
• Muichiro Tokito apologized to Uchiha Kazama and left to absorb the combat experience Kazama had given him.
• Tanjiro and Nezuko bowed in gratitude, and Uchiha Kazama asked Tanjiro to take him to the Swordsmith Village swordsmiths.
• Tetsujikawara Tetsujin arrived with three swordsmiths and initially rejected Kazama's proposed trade because they served the Demon Slayer Corps.
• Uchiha Kazama offered to kill an Upper Rank Demon in exchange for the swordsmiths' help.

Uchiha Kazama refused to join the Demon Slayer Corps but offered to kill an Upper Rank demon in exchange for something beneficial to both sides. After leaving the Swordsmith Village, he learned that the Nine Tailed Beasts had grown stronger and were becoming independent of their original bodies.

• Uchiha Kazama offered the Swordsmith Village a chance to have an Upper Rank demon killed, but insisted on an exchange rather than being guilt-tripped into helping for free.
• Tecchin Tecchikawahara said the village would report the offer to their master, while Tanjiro urged Kazama to join the Demon Slayer Corps and Kazama refused.
• Uchiha Kazama warned Tanjiro that Nezuko might undergo unusual changes and needed rest and plenty of food, then left the village.
• Uchiha Kazama asked Moryo about the Will of the World and learned it sensed his presence with apparent excitement.
• Uchiha Kazama summoned the Nine Tailed Beasts, who told him they had grown stronger and were losing their connection to their original bodies.

Uchiha Kazama released the nine tailed beasts to explore while staying connected to them through Flying Thunder God Marks. On the road to the Swordsmith Village, Butterfly Shinobu warned Giyu Tomioka about a terrifying being, but Giyu misunderstood her warning and hurried ahead to prove he was popular.

• Uchiha Kazama let the nine tailed beasts leave his body and told them he could teleport them back if needed.
• Shukaku joked about sealing his mark to escape, but Kurama mocked him and left for the mountains.
• Isobu settled into a nearby lake, and the other tailed beasts went their separate ways without sealing their marks.
• Butterfly Shinobu warned Giyu Tomioka that the person they were going to meet might not be human and had released nine terrifying monsters.
• Giyu Tomioka mistook the warning for a chance to prove he was popular and rushed toward the Swordsmith Village.

Giyu Tomioka and Butterfly Shinobu found traces of Upper Ranks Gyokko and Hantengu near the Swordsmith Village, then encountered Kurama and other tailed beasts. As they continued toward the village, Akaza arrived at the site and sensed a frightening aura.

• Butterfly Shinobu detected faint traces of Gyokko and Hantengu and warned Giyu Tomioka that Upper Rank demons might still be nearby.
• Kurama appeared before Giyu Tomioka and Butterfly Shinobu, dismissed them, and vanished at great speed.
• Kokuō and Seven-Tails Chōmei passed by, leaving Giyu Tomioka and Butterfly Shinobu overwhelmed by their auras.
• Giyu Tomioka hurried after the tailed beasts, believing their controller might be someone he could befriend, and Butterfly Shinobu followed him.
• At midnight the following day, Akaza found traces of Hantengu and sensed an aura that made him wary.

Kokushibo, Akaza, and Doma continued their mission toward the Swordsmith Village, while Butterfly Shinobu and Giyu Tomioka arrived and discovered that Nezuko had been cured by Uchiha Kazama. Kazama and Mitsuri Kanroji joined the others at a meal, setting the stage for their meeting and possible trade.

• Kokushibo ignored Akaza's warnings and pressed ahead, while Akaza punched Doma after Doma placed a hand on his shoulder.
• Butterfly Shinobu and Giyu Tomioka arrived at the Swordsmith Village and found Tanjiro outside Uchiha Kazama's door.
• Giyu noticed that Nezuko had no bamboo muzzle or demonic aura, and Shinobu drew her sword and demanded an explanation.
• Tanjiro told them that Nezuko had not eaten anyone and that Kazama had cured her; Nezuko then invited them to eat the food she had made.
• After finishing his encounter with Mitsuri, Kazama bathed and dressed her, then brought her to the table where Shinobu, Giyu, Tanjiro, and Genya sat, with Nezuko standing nearby.

Uchiha Kazama offered to help the Demon Slayer Corps slay demons in exchange for Nichirin Sword forging methods and materials, then revealed that three Upper Ranks would attack the following night. He cured Butterfly Shinobu’s poison and promised to kill Doma, leaving the group to rest before the coming battle.

• Uchiha Kazama asked for the Nichirin Sword forging method and materials in exchange for helping the Demon Slayer Corps slay demons.
• Butterfly Shinobu questioned how Uchiha Kazama knew demons would attack, and he explained that the Tailed Beasts had reported their movements.
• Uchiha Kazama revealed that Kokushibo, Doma, and Akaza would arrive the following night, angering Butterfly Shinobu.
• Uchiha Kazama removed Butterfly Shinobu’s poison and calmed her anger, while Mitsuri Kanroji embraced her and spoke embarrassingly about Uchiha Kazama.
• Uchiha Kazama promised to kill Doma so Butterfly Shinobu would not need to sacrifice herself, and the group ate together.
• Uchiha Kazama, Tanjiro, Nezuko, Genya Shinazugawa, Mitsuri Kanroji, Giyu Tomioka, and Butterfly Shinobu returned to their quarters to rest before the attack.

Uchiha Kazama told Mitsuri Kanroji about his world, then confronted Butterfly Shinobu after she demanded her poison back and questioned whether he could kill Doma. Shinobu left after he promised she would learn the truth tomorrow night, while Kazama considered how to complete his mission and find the world's origin.

• Uchiha Kazama explained the Shinobi World to Mitsuri Kanroji and used Genjutsu to help her fall asleep.
• Butterfly Shinobu asked Uchiha Kazama to return her poison and offered to do anything if he could kill Doma.
• Uchiha Kazama told Butterfly Shinobu her attempt to offer herself would achieve nothing and said she would see the truth tomorrow night.
• Uchiha Kazama checked his mission panel, noted that contact with Muzan Kibutsuji remained at zero, and decided to seek the world's origin through Muzan.
• Butterfly Shinobu thanked Uchiha Kazama, kissed his cheek, and vanished into the night.

Uchiha Kazama turned away Tamayo’s invitation after kicking Yushiro, then learned demons were approaching the Swordsmith Village. He agreed to fight Giyu Tomioka, and the chapter ended as Giyu began using Water Breathing.

• Yushiro told Uchiha Kazama that Tamayo wanted to meet him, but Kazama dismissed the invitation and went back inside.
• When Yushiro tried to stop him, Uchiha Kazama kicked him unconscious.
• The next morning, Uchiha Kazama’s Shadow Clone reported that three demons had reached the outskirts of the Swordsmith Village and were likely to attack that night.
• Uchiha Kazama ate with Mitsuri Kanroji, Giyu Tomioka, and Butterfly Shinobu while Tanjiro trained and Nezuko learned to cook.
• Giyu Tomioka asked Uchiha Kazama to fight him, and Kazama accepted before they faced off at the training ground.
• Uchiha Kazama summoned his Dark Moon sword and revealed his sword intent as Giyu began Water Breathing.

Uchiha Kazama trained Giyu Tomioka, Mitsuri, Tanjiro, and Genya through a recorded Genjutsu battle, then went with Yushiro to meet Tamayo. Tamayo asked Kazama for his blood, leaving him curious about her plans.

• Yushiro woke after Uchiha Kazama's kick and rushed toward a powerful presence, where he found Kazama sparring with Giyu Tomioka.
• Uchiha Kazama drew Mitsuri, Tanjiro, and Genya Shinazugawa into the fight, then recorded the battle in Genjutsu so they could train without risking injury.
• Uchiha Kazama told Butterfly Shinobu to supervise the training and give the others food if they collapsed.
• Yushiro apologized to Uchiha Kazama and persuaded him to visit Tamayo, who was working on a medicinal solution in her courtyard.
• Tamayo welcomed Uchiha Kazama and directly asked him for his blood.

Uchiha Kazama refused Tamayo’s request for his blood and returned to the Swordsmith Village, where he saw Tanjiro emerge from a Genjutsu with a powerful new sword technique. After hearing about Tanjiro and Nezuko’s visit to Tamayo, Kazama encouraged Nezuko to get a Nichirin Sword of her own.

• Tamayo asked Uchiha Kazama for his blood to help her treat humans turned into demons, but he refused and vanished; she warned Yushiro not to attack him.
• Uchiha Kazama stopped at a cliff, confirmed that his uneasy feeling about Tamayo had faded, and returned to the Swordsmith Village.
• After Kazama dispelled the Genjutsu, Tanjiro demonstrated a new Flame Breathing technique that split a boulder with a smooth cut.
• Kazama asked Tanjiro about his and Nezuko’s visit to Tamayo and learned that both siblings had given her blood.
• Kazama told Nezuko to ask a swordsmith to forge her a Nichirin Sword, then left.

Uchiha Kazama promised Butterfly Shinobu that her nightmares would end and empowered her to face Doma. She found Doma in the forest, and as he prepared to fight with his Blood Demon Art, chakra enveloped her.

• Butterfly Shinobu asked Uchiha Kazama to let her fight Doma herself, and he agreed.
• At night, Uchiha Kazama sent Butterfly Shinobu into the forest to find Doma while he watched over her.
• Butterfly Shinobu noticed her senses, speed, and strength had improved as she searched for Doma.
• Butterfly Shinobu met Upper Rank Three, Akaza, who told her where to find Doma and encouraged her to go.
• Doma sensed the threat in Butterfly Shinobu's presence, summoned five clones with his Blood Demon Art, and prepared to fight.
• Butterfly Shinobu drew her Nichirin Sword, and chakra surrounded her as she recognized it as Uchiha Kazama's power.

Butterfly Shinobu used her new power to overwhelm Doma and avenge the older sister he had eaten. She pinned him to a tree with a corrosive strike that stopped his regeneration, leaving him to face the coming dawn as she wept.

• Doma sensed the danger of Butterfly Shinobu’s Chakra Cloak but dismissed the possibility that she was the hidden Slayer who could kill Upper Rank Demons.
• Butterfly Shinobu used Moon’s Whisper to behead Doma before he could react, then cut down his five clones as well.
• Doma repeatedly regenerated while Butterfly Shinobu tested her new power and taunted him about the sister he had eaten.
• Butterfly Shinobu revealed that she had been the little girl whose older sister Doma devoured, then overpowered him until he could no longer restore his head.
• Butterfly Shinobu pinned Doma’s head to a tree with a corrosive strike that prevented regeneration, and stood crying as dawn approached.