Chapter Summaries

Haruto and Kagaya discussed the Demon Slayer mark and the danger of awakening it before realizing Tanjiro had gone to the Swordsmith Village with Genya. At the village, Tanjiro and Genya arrived to visit their teacher’s master, while a bloodshot eyeball secretly followed the Kakushi who had escorted them away.

• Haruto and Kagaya escaped through a concealed underground shelter, where Kagaya explained the explosives and escape route hidden beneath the Ubuyashiki estate.
• Haruto and Kagaya discussed the claim that marked swordsmen died before age twenty-five and reflected on the Demon Slayer Corps’ willingness to risk their lives to defeat Muzan.
• Haruto learned that Tanjiro and Genya had gone to the Swordsmith Village after damaging their weapons in the Entertainment District battle.
• Tanjiro and Genya arrived at the Swordsmith Village and set out to visit Mr. Goto, their teacher’s master.
• A bloodshot eyeball emerged beside the road, watched the village entrance, and followed the Kakushi who had escorted Tanjiro and Genya.

Tanjiro and Genya encountered Mitsuri Kanroji on their way to the hot springs, while Hotaru Haganezuka went into the mountains to forge Tanjiro a sword. Elsewhere, Muichiro Tokito rejected Kotetsu’s offer to use his creations and insulted the Mechanical Puppet, prompting Kotetsu to attack him.

• Hotaru Haganezuka chased Tanjiro around his house, then stormed off into the mountains after telling everyone not to bother him.
• Kanzaburo Kanamori reassured Tanjiro that Hotaru would forge him a good sword, and Tanjiro went toward the hot springs with Genya.
• Tanjiro warned Mitsuri Kanroji about her loose bathrobe, embarrassing Genya, who struggled to answer her greeting.
• Tanjiro told Mitsuri that Genya was shy around girls, and Genya threw a tooth at Tanjiro before running toward the hot springs.
• Kotetsu offered Muichiro Tokito other creations in exchange for modeling for his Mechanical Puppet, but Muichiro refused and criticized the puppet’s appearance.
• Kotetsu grew furious at Muichiro’s insults and smashed the mouth of his Hyottoko Mask toward Muichiro’s face.

Haruto visited the Kamado children on Mount Sagiri and discussed Muzan’s likely next move with Urokodaki, while describing his hopes for a peaceful family future. At the Swordsmith Village, Tanjiro told Genya how grueling training with Yoriichi Type Zero had ended with him breaking the puppet and discovering an ancient Nichirin Blade, which Haganezuka immediately took away.

• Haruto returned to Mount Sagiri, where Takeo trained under Urokodaki and Delia, Shigeru, and Rokuta stayed with them.
• Haruto warned Urokodaki that Muzan might retaliate after losing two Upper Rank demons and said Tanjiro and Nezuko remained central to the conflict.
• Haruto told Urokodaki he hoped to raise children who could live happy, comfortable lives and predicted that humans who cherished life would win the war against demons.
• Tanjiro returned to the Godogawa Family’s house after three days of harsh training with Yoriichi Type Zero, and Genya gave him food and tea.
• Tanjiro explained that Kotetsu had trained him relentlessly with the puppet after Muichiro Tokito angered him, and Tanjiro eventually broke the puppet.
• Tanjiro said he discovered a Sengoku-period Nichirin Blade inside Yoriichi Type Zero, but Hotaru Haganezuka seized it to forge a stronger sword.

Tanjiro, Genya, and Muichiro encountered an Upper Rank demon attacking the Swordsmith Village, while Haruto raced there after hearing the news. Muichiro killed Upper Rank Four, the villagers survived, and the Corps began arranging the village’s relocation as Haruto arrived to find it smoking.

• Muichiro asked Tanjiro and Genya where to find his newly assigned swordsmith, Kanamori, and Tanjiro offered to help him look.
• A demon with two horns appeared outside the door and lunged at Godogawa, revealing that an Upper Rank had reached the village.
• Cang Kong warned Haruto that Upper Ranks had attacked the Swordsmith Village, so Haruto hurried there using his Breathing Style.
• Cang Kong reported that Muichiro Tokito had slain Upper Rank Four and that villagers were injured but none had died.
• The Corps began arranging to relocate the exposed Swordsmith Village, and Haruto reached the area as black smoke rose from it.

After Tanjiro and Muichiro defeated Hantengu, Nezuko survived the sunlight and spoke to her brother, revealing that she had conquered it while remaining a demon. Muzan learned of Nezuko’s ability and resolved to devour her so he could conquer the sun himself.

• Tanjiro mourned Nezuko after Hantengu’s head dissolved in the sunlight, but Muichiro pointed out that she was standing behind him unharmed.
• Nezuko greeted Tanjiro in the sunlight, and he embraced her, realizing she had conquered the sun without becoming human.
• Muichiro recalled his brother Yuichiro’s last words and watched Tanjiro and Nezuko reunite as Genya and Haruto joined them.
• Haruto celebrated with the group while fearing that Muzan would soon come after Nezuko.
• Muzan, disguised as Toshikuni, learned that a demon had conquered sunlight and decided to devour Nezuko so he could become immune to the sun.

At an emergency Hashira Meeting, Kagaya warned that Muzan would likely launch an assault to capture Nezuko, who had conquered sunlight. Muichiro described awakening his Demon Slayer Mark during the fight, leaving the Hashira to consider how the mark worked and what it meant.

• Sanemi, Kyojuro, Obanai, and the other Hashira discussed the Swordsmith Village battle and Muichiro’s recovery while Haruto told Sabito that Nezuko had overcome sunlight.
• Kagaya arrived and announced that Muichiro, Tanjiro, and Genya had killed Upper Rank Four, then warned that Muzan might attack to seize Nezuko.
• Kagaya asked Muichiro about the Demon Slayer Mark, explaining that Tanjiro had awakened one too and that marks had appeared among Swordsmen during the Sengoku Period.
• Muichiro recalled becoming intensely angry at the demon’s complaints and said his heart rate rose above two hundred and his temperature exceeded thirty-nine degrees.
• Muichiro explained that his strength, speed, and Breathing Style improved in that state, then the Hashira considered his account.

The Hashira discussed the Demon Slayer Mark’s deadly age limit and organized a large-scale Hashira training program for recovering Tanjiro and the other swordsmen. Haruto planned to use Kotetsu’s Mechanical Puppets in his training, while Inosuke’s crash into the Butterfly Mansion marked the program’s chaotic start.

• Kagaya told the Hashira that those who awakened the Demon Slayer Mark could die at twenty-five, and Gyomei accepted the risk without resentment.
• The Hashira agreed to hold a training program where swordsmen would rotate through their instruction, with Tanjiro joining once he recovered.
• Haruto was assigned to teach after Gyomei and planned to retrieve Kotetsu’s modified Mechanical Puppets from the Swordsmith Village.
• At the Butterfly Mansion, Tanjiro received a new Nichirin Blade while Genya complained about the noise in the sickroom.
• Inosuke smashed through the sickroom window and announced that intensive training had begun, prompting Aoi to order the girls to secure the wreckage.

Murata endured the Hashira Training, struggling through each Hashira’s methods while comparing himself with younger, more talented swordsmen. He remained at Gyomei Himejima’s mountain training, wondering when he would finally attend Mr. Haruto’s training.

• Murata survived Tengen Uzui’s stamina training and Muichiro Tokito’s high-speed movement training, then went to Kanroji’s residence.
• Kanroji’s flexibility training injured Murata, and he spent ten days enduring the painful exercises.
• Murata found the Flame Hashira’s training comfortable until Shinjuro Rengoku arrived and made it far harsher.
• Murata passed the Serpent Hashira’s swordsmanship training and left before it became even more terrifying.
• Murata reached Gyomei Himejima’s mountain training and endured the waterfall, logs, and boulder exercises as the boy in the boar mask, Genya, Tanjiro, and Zenitsu arrived.
• Murata watched the younger swordsmen begin moving the boulders and wondered when he would attend Mr. Haruto’s training.

Kaigaku accepted demon blood from a six-eyed demon and emerged from his transformation intent on growing stronger by eating people. Haruto confronted him at the scene of the slaughter and prepared to kill him.

• After vomiting up the contents of his stomach, Kaigaku recalled how he had begged the six-eyed demon for his life and agreed to become a demon.
• Kaigaku drank the demon’s blood, transformed, and resolved to devour people and rise through the Twelve Kizuki.
• Kaigaku went outside to feed on the dead Demon Slayer Corps swordsmen, but found Haruto tending to their bodies.
• Haruto confronted Kaigaku about eating people, then drew his Nichirin Blade and promised to end his life swiftly.

Haruto killed Kaigaku after rejecting his excuses for becoming a demon, while the Corps received a false report that Kaigaku had died heroically. At Mount Sagiri, Zenitsu suspected the truth about his senior and began training without getting a direct answer from Haruto.

• Kaigaku blamed Haruto and the Demon Slayer Corps for failing to save him, but Haruto explained that others had suffered without rescue and that this did not excuse Kaigaku's choices.
• Kaigaku tried to flee, but Haruto beheaded him, and his body disintegrated as the comments on Haruto's screens disappeared.
• Kagaya's Kasugai Crow acknowledged Haruto, and the Corps later reported that Kaigaku had died valiantly after being devoured by an Upper Rank.
• Jigoro Kuwajima mourned Kaigaku, Gyomei Himejima offered a prayer, and Zenitsu trained hard after hearing that Haruto had found the slain slayers.
• Tanjiro, Inosuke, Zenitsu, and Genya arrived at Mount Sagiri, where Haruto and the other former Mount Sagiri trainees prepared to train them.
• Zenitsu asked Haruto whether Kaigaku had changed, and Haruto left the truth unspoken before telling him it was time to train.

Haruto trained the new Swordsmen with upgraded Mechanical Puppets before attending a secret meeting at the Ubuyashiki Estate. There, Kagaya and Tamayo met cordially to discuss their shared goal of slaying Muzan Kibutsuji.

• Haruto watched Zenitsu, Tanjiro, Genya, and Inosuke struggle against Kotetsu's upgraded Mechanical Puppets during training on Mount Sagiri.
• Kagaya's Kasugai Crow summoned Haruto to a secret meeting at the Ubuyashiki Estate.
• Haruto teased Yushiro outside the room where Tamayo was meeting with Kagaya, then entered and shut the door.
• Tamayo and Kagaya acknowledged the strangeness of a demon and the Demon Slayer Corps leader meeting peacefully.
• Tamayo had come to the Ubuyashiki Estate at personal risk because she and Kagaya shared the goal of slaying Muzan Kibutsuji.

Haruto, Tamayo, and Kagaya discussed Nezuko’s transformation and Muzan’s efforts to track her and the Demon Slayer Corps. After Tamayo gave Haruto what might be his final injection, Kagaya and Amane spoke about letting their children enjoy a normal life once the fight was over.

• Tamayo explained that Nezuko’s unusual condition came from her individual constitution and that she had broken free of Muzan Kibutsuji’s control.
• Haruto learned that Muzan had sent Nakime to track the Demon Slayer Corps and locate Nezuko, but Muichiro Tokito had killed the demon sent to the Swordsmith Village.
• Kagaya said the Corps could use Muzan’s surveillance efforts to set something up, though he kept his plans from Haruto and Tamayo.
• Tamayo gave Haruto what she said might be his final dose, and he became drowsy and went to sleep in an empty room.
• Yushiro took Tamayo and Chamamaru away, and Kagaya told Amane he wanted Haruto to take their children to Kagoshima after the fighting ended.

Haruto discussed the Transparent World and the still-mysterious Bright Red Nichirin Sword with Sabito and Giyu, using the audience’s comments to search for ways to activate it. He suspected Tanjiro and Tokito might be able to trigger it by clashing swords, and prepared to tell Tanjiro about his idea as a dream.

• Haruto told Sabito that Godogawa had only sprained his ankle and recounted how Muichiro had saved him from the demon.
• Giyu said he was beginning to experience the Transparent World, and Sabito encouraged him.
• Haruto asked Sabito about the Bright Red Nichirin Sword, but Sabito said its activation method was unknown to him.
• Haruto read audience comments suggesting that the sword could be activated by gripping it hard or by two marked swordsmen striking their blades together.
• Haruto decided to ask Tanjiro and Tokito to try clashing swords and told Tanjiro that he had dreamed something important.

Tanjiro and Muichiro tried to turn their blades bright red, but Nezuko used Exploding Blood to ignite Tanjiro’s sword instead. As the blade’s red glow faded, the Demon Slayers recognized its value against Muzan, while Inosuke became the first to pass the Mechanical Puppet test.

• Tanjiro and Muichiro clashed their Nichirin Blades, but neither sword turned red and their Demon Slayer Marks only grew steadier.
• Nezuko offered to use her Blood Demon Art, and Tanjiro understood that she could ignite his blade as she had during the battle against Hantengu.
• Nezuko cried “Exploding Blood!” and set Tanjiro’s Nichirin Blade alight, turning it blood-red and slowing a demon’s regeneration when it was cut.
• Muichiro asked Nezuko to help turn his blade red when the chance came, and she eagerly agreed.
• Inosuke held up a Mechanical Puppet’s head after passing the test, while Zenitsu charged toward the puppets, determined to earn Nezuko’s praise.

Haruto and Gyomei prepared for Muzan’s attack on Demon Slayer Corps Headquarters, but Kagaya refused to abandon his plan. Muzan located the Ubuyashiki Estate and arrived to confront Kagaya and Haruto, beginning the final battle.

• Haruto and Gyomei discussed how to protect Kagaya after he rejected their plan, and Haruto resolved to seize him and escape if danger arose.
• Sabito reported that Tengen had spotted tracking eyes near Headquarters, prompting Gyomei to contact the Hashira while Haruto went to Kagaya and ordered an evacuation.
• Haruto asked Cang Kong to contact Tamayo as the three men raced to respond to the imminent threat.
• Nakime confirmed the Ubuyashiki Estate’s location, and Muzan ordered her to send him there while she wondered what would become of demons after his victory.
• Muzan reached the estate and found Kagaya and Haruto in the study, where Kagaya greeted him and Muzan mocked his appearance.

Kagaya confronted Muzan Kibutsuji over the curse that had doomed the Ubuyashiki Family and defended the Demon Slayer Corps’ inherited will. As Haruto taunted Muzan, the demon began turning transparent, revealing how extensively he had altered his body to survive.

• Kagaya and Muzan traded insults as Muzan arrived to kill the head of the Ubuyashiki Family.
• Kagaya explained that Muzan’s existence had brought a curse of frailty, illness, and short lives upon every generation of the Ubuyashiki Family.
• Muzan dismissed the curse and claimed he would become a god after eating Nezuko, then asked Haruto where she was hidden.
• Haruto mocked Muzan for failing to find Nezuko, and Muzan vowed he could outlast humans and discover her whereabouts eventually.
• Kagaya declared that human will and the Demon Slayer Corps’ legacy would endure beyond Muzan, whose supposed eternity would collapse when he died.
• Haruto saw Muzan’s body turning transparent and realized that Muzan had changed his body so extensively that even a small surviving piece could regenerate.

Haruto pulled Kagaya Ubuyashiki into a hidden hole just before Muzan could catch them, while the Ubuyashiki Estate’s heavy artillery detonated around Muzan. The Hashira found the estate reduced to ruins and feared Haruto and Kagaya had died, but Zenitsu heard something alive in the fire as Muzan’s remaining flesh began to recover.

• Muzan attacked Haruto and Kagaya with Black Blood Brambles, but Haruto severed them and dragged Kagaya into a hidden hole that sealed behind them.
• The Hashira arrived at the Ubuyashiki Estate, where Giyu warned Sanemi to stay back as the heavy artillery fired into the estate.
• Sanemi, Tanjiro, and the others searched the devastated ruins and could not find Haruto, Kagaya, or Muzan.
• Shinobu tried to reassure herself that Haruto would survive while the Hashira and Corps members waited for signs of what had happened.
• Zenitsu heard something alive in the fire, and Muzan’s mangled remains began regaining human form as the Corps prepared to kill him.

Muzan was trapped by Tamayo’s humanizing medicine as the Demon Slayer Corps attacked, while Akaza’s vision of Koyuki finally vanished. Muzan called on Nakime to pull everyone into the Infinity Castle, and Akaza was left alone with the sound of the biwa.

• Muzan sensed an unfamiliar demon nearby, then Tamayo used black thorns to pin him down and stabbed his neck.
• Tamayo revealed that the medicine Muzan had swallowed could turn demons back into humans, and said she had spent centuries developing it to avenge her family.
• Gyomei Himejima struck Muzan and helped carry Tamayo away, while Tanjiro and the other Demon Slayers launched an attack.
• Muzan ordered Nakime to pull everyone into the Infinity Castle.
• Akaza called for Koyuki, but she had disappeared, and a biwa note sounded again.

The Demon Slayer Corps members fell into the Infinity Castle, where Tanjiro, Kyojuro, and Giyu encountered Akaza, who demanded to know where Haruto Takanashi was. Elsewhere, Inosuke, Kanao, and Tengen Uzui found Doma, who targeted Kanao.

• Muzan fled through the shifting Infinity Castle while Kyojuro caught Tanjiro and fought off demons alongside Giyu.
• Tanjiro sensed a familiar presence, and the group encountered Akaza, who attacked Tanjiro and demanded to know where Haruto Takanashi was.
• Inosuke asked Kanao and Tengen Uzui about Haruto and Shinobu, then sensed a powerful demon and charged through a wall.
• Inosuke, Kanao, and Tengen Uzui landed in a lotus pond and found Doma eating a human arm.
• Doma threatened to kill Inosuke and Tengen Uzui and said Kanao looked appetizing, while Tengen identified him as the demon Haruto had called mentally ill.

Kanao faced Doma with Tengen Uzui and Inosuke, drawing strength from Shinobu and Kanae’s advice to protect herself and punish him. Meanwhile, Haruto learned that the survivors had been transported into the Infinity Castle and used Yushiro’s Blood Demon Art to enter, choosing to confront Doma first.

• Doma asked the Demon Slayer swordsmen where Takanashi was, and Tengen Uzui challenged him as Kanao fought through her fear.
• Kanao remembered Shinobu and Kanae urging her to protect herself and help punish Doma, then resolved to do both.
• Haruto emerged from the collapsed tunnel and learned that the Ubuyashiki Estate’s surviving fighters had been transported into the Infinity Castle with Muzan.
• Haruto confirmed that Amane and the children were safe, Nezuko was being treated with Tamayo’s medicine, and Kuwajima and Rengoku had come to help.
• Yushiro used his Blood Demon Art to teleport Haruto into the Infinity Castle, where Haruto chose to go after Doma.