Chapter Summaries

Akaza fled after seeing Butterfly Shinobu defeat Doma, then challenged Giyu Tomioka at the Swordsmith Village and was overwhelmed by Giyu’s strength. As Tanjiro arrived to test his newly learned Breathing Style, Uchiha Kazama revealed that Upper Rank One Kokushibo had appeared nearby.

• Akaza read that Butterfly Shinobu was considered relatively weak, then fled when she ordered him away from Doma.
• Akaza went to the Swordsmith Village to test its fighters, where Uchiha Kazama confirmed Doma was close to death.
• Giyu Tomioka challenged Akaza and swiftly severed both his arms while trapping him in currents of water.
• Tanjiro arrived and told Uchiha Kazama he had grown used to his Breathing Style, though he had not tested it in a real fight.
• Uchiha Kazama pointed out Kokushibo and explained that he was the elder brother of the man who taught Tanjiro’s family Sun Breathing.

Tanjiro battled Kokushibo, using modified Flame and Sun Breathing to damage the Upper Rank One while Uchiha Kazama watched. After completing his demon-contact mission, Uchiha Kazama empowered Tanjiro with chakra and left him to continue the fight.

• Tanjiro steadied himself and challenged Kokushibo, blocking his first attack and blasting him back with modified Flame Breathing.
• Tanjiro pressed his advantage, wounding Kokushibo with flames that temporarily stopped his healing.
• Kokushibo unleashed several Moon Breathing forms, but Tanjiro countered them with modified Sun Breathing.
• Kokushibo grew blades from his body and sent automatic Moon Blade attacks at Tanjiro, who answered with a modified Flame Dragon technique.
• Uchiha Kazama saw that his demon-contact mission had reached one hundred percent, then appeared beside Tanjiro and crushed a Moon Blade.
• Uchiha Kazama told Tanjiro to keep fighting, infused him with chakra, and vanished as Tanjiro felt his strength increase.

Tanjiro killed Kokushibo with the power Uchiha Kazama had given him, then collapsed and was healed by Nezuko. Meanwhile, Uchiha Kazama met Tamayo, refused to give her his blood, and left as she decided to wait for Muzan to act.

• Tanjiro's attacks suppressed Kokushibo's power, allowing him to behead the Upper Rank demon.
• Tanjiro repeatedly struck Kokushibo until his wounds stopped healing and his remaining eyes vanished.
• Tanjiro collapsed after killing Kokushibo, and Nezuko used Medical Ninjutsu to help him recover.
• Uchiha Kazama met Miss Tamayo in a valley, and she offered to lead him to Muzan in exchange for his blood.
• Uchiha Kazama refused Tamayo's request and warned her not to mistake his restraint for gentleness before disappearing.
• Tamayo and Yushiro decided to wait, suspecting Muzan would soon make a move.

Uchiha Kazama returned to the Swordsmith Village after Giyu Tomioka, Butterfly Shinobu, and Tanjiro had defeated Akaza, Doma, and Kokushibo. After learning that Uchiha Kazama may hold a secret connected to overcoming sunlight, Muzan Kibutsuji ordered Tamayo to lure him out.

• Giyu Tomioka told Uchiha Kazama that he had killed Akaza, Butterfly Shinobu had defeated Doma, and Tanjiro had eliminated Kokushibo.
• Giyu Tomioka thanked Uchiha Kazama for helping secure the victory and discussed their earlier deals with him.
• As the sun rose, Doma weakened and began to die from his injuries and the sunlight.
• Muzan Kibutsuji learned that his three strongest Upper Rank Demons had died and questioned how the Swordsmith Village battle had unfolded.
• Tamayo told Muzan Kibutsuji that Uchiha Kazama had refused to give her his blood and might possess a secret that could help overcome sunlight.
• Muzan Kibutsuji ordered Tamayo to lure Uchiha Kazama out by any means, then left as crimson eyes opened in the darkness and a hand struck a door.

Uchiha Kazama examined the ore used for Nichirin Swords and found that its metal could be infused with chakra, while the tailed beasts brought him more of it. After Kagaya Ubuyashiki asked him to join the Demon Slayer Corps, Kazama began healing the curse that afflicted him.

• Uchiha Kazama melted ore in the warehouse, confirmed its metal could amplify chakra, and asked Guyulang to take him to the swordsmiths and mines.
• Kurama and Son brought Uchiha Kazama metal, and he asked Son to gather and refine more while Kurama rallied the other tailed beasts.
• Butterfly Shinobu told Uchiha Kazama that Kagaya Ubuyashiki had arrived and led him to meet the Master.
• Kagaya Ubuyashiki asked Uchiha Kazama to join the Demon Slayer Corps, but Kazama explained that his curse came from the world's will and offered to heal him.
• Uchiha Kazama surrounded Kagaya Ubuyashiki with a white aura, causing the curse's marks to recede and his condition to stabilize.

Uchiha Kazama explained that he wanted to find the doctor who created Muzan Kibutsuji and eliminate the root cause of demons, while asking the Demon Slayer Corps to hunt down the remaining demons. He then told Mitsuri Kanroji and Butterfly Shinobu that he came from another world and described Konoha, leaving Butterfly concerned about whether she could manage there.

• Uchiha Kazama questioned the Hashira about Muzan Kibutsuji and the Ubuyashiki Family's history, then pointed out that Muzan's doctor might be the true source of the demons.
• Kagaya Ubuyashiki agreed that the doctor had to be found, and Uchiha Kazama said he could obtain information from Muzan and asked for the Corps' forging techniques.
• Uchiha Kazama asked Mitsuri Kanroji and Butterfly Shinobu to accompany him, then left with them to return to his residence.
• Uchiha Kazama told the two women he came from another world and explained Konoha and the special item that could take them there.
• Butterfly Shinobu asked whether they could truly travel with Uchiha Kazama and voiced concern about the powerful Otsutsuki he had mentioned.

Kagaya Ubuyashiki began mobilizing the Demon Slayer Corps after powerful demons appeared across Japan, and he promoted Tanjiro to the Sun Pillar. Meanwhile, Uchiha Kazama, Mitsuri Kanroji, and Butterfly Shinobu reached the Infirmary in Osaka so he could teach its staff his medical skills.

• Kagaya Ubuyashiki reassured the Serpent Pillar, announced a new plan, and began training the Demon Slayer Corps.
• Toriyama reported a Lower Rank–scale demon outbreak in Shimafuku, and Kagaya Ubuyashiki promoted Tanjiro to the Sun Pillar before sending him to fight and train the Corps there.
• Tanjiro brought Nezuko and contacted Zenitsu and Inosuke as he prepared to leave for Shimafuku.
• A Demon Slayer Corps member reported a similar outbreak in Osaka, so Kagaya Ubuyashiki dispatched Giyu Tomioka, Gyomei Himejima, Muichiro Tokito, and the other Hashira to handle outbreaks and train local members.
• Uchiha Kazama arrived in Osaka with Mitsuri Kanroji and Butterfly Shinobu and said he would teach his medical skills to the Infirmary staff.

Uchiha Kazama taught Kanao and the medical staff Medical Ninjutsu, while discovering that he alone could give people in this world the ability to develop chakra. As demons continued attacking across Japan, he suspected something unusual was hidden beneath the area and sent a Shadow Clone to investigate.

• Butterfly Shinobu introduced Uchiha Kazama to Kanao and the medical staff, who began learning chakra control and Medical Ninjutsu from him.
• Uchiha Kazama spent half a month teaching the medical staff and discovered that he could pass chakra to people he had personally contacted, but they could not spread it without his chakra seed.
• Mitsuri Kanroji told Uchiha Kazama that demons across Japan seemed unusually old and powerful, while he wondered why Muzan Kibutsuji was sending them to different regions instead of concentrating his forces on Osaka.
• Uchiha Kazama suspected something special might be underground and sent a Shadow Clone to investigate.
• The next morning, Uchiha Kazama helped Kanao and the others treat another group of wounded, and they completed basic treatment by noon.

Uchiha Kazama sent over a thousand Shadow Clones to kill the demons spreading across the country, then tracked Muzan Kibutsuji to an Osaka manor. Muzan survived being decapitated and grew more powerful, transforming into a monstrous form.

• Kagaya Ubuyashiki reported that the demons had doubled in number and that the Demon Slayer Corps was suffering growing losses.
• Uchiha Kazama created more than a thousand Shadow Clones and ordered them to slay every demon, then told Kagaya Ubuyashiki to plan for the Corps' future.
• A Shadow Clone reported that Shukaku had found corpses underground near Osaka and that Kurama had traced their energy links to a controller.
• Uchiha Kazama went to the Osaka manor, where Muzan Kibutsuji realized his connection to Zero had been severed and Tamayo warned that Kazama was coming.
• Uchiha Kazama tore off Muzan Kibutsuji's head, but blood from the demons beneath the manor flowed into Muzan, who regenerated with a monstrous head and a stronger aura.

Uchiha Kazama waited while Muzan Kibutsuji absorbed the demons’ blood and completed his transformation, then used Susanoo to destroy the space and kill him in sunlight. When the Demon Slayer Corps arrived, Kazama told them the demons were finished, and its members broke down in tears of joy.

• Tamayo watched Uchiha Kazama overpower Muzan Kibutsuji and feared for her life as Muzan began draining her blood.
• Uchiha Kazama learned that Muzan had reclaimed his blood from the other demons and chose to wait for the transformation to finish.
• Muzan Kibutsuji completed his transformation, and Uchiha Kazama summoned Susanoo to destroy the surrounding space and expose him to sunlight.
• Uchiha Kazama pinned Muzan with sealing arrows and watched him disintegrate into ash.
• Members of the Demon Slayer Corps arrived, and Uchiha Kazama told them he had killed Muzan and that the demons were gone.
• The Demon Slayer Corps members fell to their knees and wept with joy.

After the Demon Slayer Corps found no demons in its searches, Giyu Tomioka worried that Uchiha Kazama’s continued vigil at the ruins meant the danger was not over. Kazama told Giyu, Tanjiro, and Nezuko that the source of the demons was there and that he was waiting for it to appear.

• Kagaya Ubuyashiki learned that Muzan Kibutsuji’s death had lifted his curse and ordered the Corps to search for any surviving demons.
• The Corps searched across Osaka and other regions for half a month without finding any demons.
• Giyu Tomioka warned Kagaya that Uchiha Kazama was still at the ruins, so Kagaya sent Giyu and Tanjiro to ask why.
• Nezuko joined Tanjiro and Giyu at the ruins and brought Kazama food.
• Kazama said the source of the demons was at the ruins and asked whether any demons had appeared during the searches.
• Tanjiro questioned Kazama because he thought Muzan Kibutsuji had already been killed.

Uchiha Kazama revealed that Tamayo was the true source of demons and waited for her to appear. When Tamayo and Yushiro arrived, Kazama showed her a Blue Spider Lily, and Yushiro lunged to take it.

• Uchiha Kazama explained to Tanjiro, Nezuko, and Giyu Tomioka that Muzan Kibutsuji was not the true source of demons and that he was waiting for the doctor who had turned Muzan into a demon.
• Uchiha Kazama identified a nearby corpse as Tamayo, and Tamayo revived herself while Yushiro appeared behind her.
• Yushiro invited Uchiha Kazama to follow Tamayo, promising immortality and freedom from sunlight.
• Tamayo urged Uchiha Kazama to join them, but he said he had already surpassed the limits of life and produced a Blue Spider Lily.
• Yushiro rushed toward Uchiha Kazama and reached for the Blue Spider Lily.

Uchiha Kazama attacked Tamayo and learned that she was connected to the demon’s creation, while Yushiro sacrificed himself trying to save her. Tamayo transformed and repeatedly regenerated after Kazama’s attacks, but her strength dwindled as Butterfly Shinobu and Mitsuri Kanroji arrived.

• Uchiha Kazama struck Tamayo and received a system notification that his hidden mission was 50% complete.
• Uchiha Kazama used Amaterasu on Tamayo and sent Tanjiro to fetch Butterfly Shinobu and Mitsuri Kanroji.
• Yushiro used Blood Demon Art: Spirit-Swallowing Reversal to take the flames from Tamayo, then burned to ashes in the sunlight.
• Tamayo transformed into a monstrous figure, but Uchiha Kazama smashed her with Susanoo and blocked her blood arrows with Amaterasu Guard.
• Uchiha Kazama repeatedly struck Tamayo using Space-Locking Strike, weakening her as Butterfly Shinobu and Mitsuri Kanroji arrived.

Uchiha Kazama destroyed the underground reserve that had allowed the strange doctor to survive, completing his mission. He prepared to leave the world with Butterfly Shinobu and Mitsuri Kanroji, then returned the Nine Tailed Beasts to his side.

• Butterfly Shinobu and Mitsuri Kanroji arrived and watched Uchiha Kazama repeatedly destroy "Tamayo" while Giyu Tomioka explained that Kazama seemed to be inspecting something after each attack.
• Uchiha Kazama used the Jōgan to trace "Tamayo's" connection underground, destroyed her body with a Time-Piercing Slash, and found that the mission was still incomplete.
• Uchiha Kazama used Super Shinra Tensei to crush the underground blood packs and eliminate the strange doctor's final reserve, completing the mission with an S rating.
• Uchiha Kazama told Butterfly Shinobu and Mitsuri Kanroji to use their item cards to leave with him, said farewell to Giyu Tomioka and Nezuko, and departed with the two women.
• After leaving, Uchiha Kazama summoned the Nine Tailed Beasts back so they would not remain in the world on their own.

Uchiha Kazama earned an SSS rating by seizing world-origin power, then returned to the mission space and received new rewards. The system upgraded its missions to let him select destinations and rewards, and he considered three worlds.

• Giyu Tomioka and Nezuko bowed to honor Uchiha Kazama after he and the others vanished.
• Uchiha Kazama gathered the tailed beasts, then carried Butterfly Shinobu and Mitsuri Kanroji in his Susanoo as he searched underground for the world's origin power.
• Uchiha Kazama used Moryo to block a giant hand and seized the origin power, earning an SSS mission rating and returning to the mission space.
• Butterfly Shinobu and Mitsuri Kanroji disappeared, while Uchiha Kazama received faster cultivation, Godstrike, and ten Substitute Scarecrows.
• Uchiha Kazama asked for a way to return to the Shinobi World, and the system upgraded its missions so he could select worlds and rewards.
• The system offered One-Punch Man, Parasyte, and Tokyo Ghoul, and Uchiha Kazama weighed their difficulty.

Uchiha Kazama chose the Seven Deadly Sins World and arrived without any of his strength sealed. He found Elizabeth at the start of the story and earned her trust by asking her to remove her burdensome armor.

• Uchiha Kazama rejected the Gourmet World because the system might seal his strength and selected the Seven Deadly Sins World instead.
• The system warned him that the world held godlike power and instructed him to assist the first-stage storyline, then transported him there.
• Uchiha Kazama read the system’s notifications, sensed someone nearby, and concluded that the Seven Deadly Sins had been scattered and the kingdom was under the Grand Holy Knights’ control.
• Uchiha Kazama found Elizabeth struggling through a forest in rusty armor and told her that it would not protect her from the Holy Knights.
• Elizabeth removed her armor, and the system announced that Uchiha Kazama had earned her trust.

Uchiha Kazama agreed to escort Elizabeth east to find the Seven Deadly Sins. They reached the Boar Hat, where Meliodas was working as the tavern's owner, and the chapter ended as Kazama and Elizabeth arrived after the armored giant was thrown inside.

• Elizabeth offered Uchiha Kazama gold to escort her, but he declined payment and agreed to help her find the Seven Deadly Sins.
• Elizabeth pointed east, and Uchiha Kazama carried her swiftly toward their destination while she wondered if his lightning-like magic resembled Gil's.
• At the Boar Hat, Hawk woke Meliodas and urged him to prepare food for the crowd of customers.
• Meliodas served drinks as patrons discussed the Seven Deadly Sins and the armored giant said to be one of them.
• A powerful presence arrived, an armored figure was thrown into the tavern, and the terrified customers fled without paying.
• Meliodas opened the door and saw Uchiha Kazama and Elizabeth standing outside.

Uchiha Kazama asked Meliodas to let him join the Seven Deadly Sins, claiming he wanted to help confront the Holy Knights and the threat hidden underground. After testing Kazama's strength, Meliodas accepted him, and they decided to form the Eight Deadly Sins.

• Meliodas introduced himself to Elizabeth as the captain of the Seven Deadly Sins and checked that Kazama had not harmed her.
• Kazama revealed his power to Meliodas and asked to join as the Eighth Sin.
• Meliodas demanded that Kazama prove his strength without using special magical abilities.
• Kazama and Meliodas arm-wrestled for half an hour, with Kazama holding Meliodas in a stalemate.
• Meliodas accepted Kazama into the group and asked what codename he wanted.

Uchiha Kazama gained the world's recognition through Moryo and the Nine Tailed Beasts, then helped Meliodas deal with Holy Knights as they prepared to leave and find the other Seven Deadly Sins. Back at the Boar Hat Tavern, Meliodas questioned Kazama about the Kingdom.

• Uchiha Kazama summoned Moryo's energy and gained ten marks recognized by the world's origin, which could steadily consume the world's origin.
• Meliodas said he planned to find the other Seven Deadly Sins and return to the Kingdom to learn why the Holy Knight Order had changed.
• Uchiha Kazama killed a Holy Knight, burned his body with black flames, and told the frightened knights to follow their own sense of justice.
• Uchiha Kazama saw that his quest to gain Meliodas's recognition had reached 90%, then followed Meliodas and Elizabeth back to the Boar Hat Tavern.
• Meliodas left with Kazama, Elizabeth, and Hawk Mama to avoid more Holy Knights and search for another member of the Seven Deadly Sins.
• Meliodas asked Uchiha Kazama what he thought of the Kingdom.

Uchiha Kazama questioned Meliodas about why he continued his search after learning about the demons, but Meliodas focused on finding Diane and Ban. The group reached a village near Diane’s forest, where Meliodas went to fetch water while Kazama stayed at the busy Boar Hat Tavern.

• Uchiha Kazama asked Meliodas why he had kept investigating, and Meliodas declined to explain before saying they would find Diane and Ban.
• Gil found traces of Meliodas’s aura at the site of the burned Holy Knight and vowed to find and kill him.
• Gil returned to his base to track Meliodas and rejected a messenger’s attempt to discuss other assignments.
• Hawk Mama surfaced near a village, and Meliodas said he would fetch water before they went to find Diane.
• Meliodas stopped Uchiha Kazama from threatening the villagers, left Hawk and Kazama to run the tavern, and went to the village as customers arrived.