Arc 8Chapters 176–200
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No recap yet.
In Shinagawa, Gyutaro and Ume tracked a famous swordsman to the Tongda Riverbank and watched him enter a poor woman’s home after a child begged for help. The encounter stirred Gyutaro’s memories of his and Ume’s childhood, ending with his vow that they would stay together forever.
Gyutaro recalled how Takanashi Sōma rescued a poor woman and her child, then later returned with Demon Slayer Corps Swordsmen and was eaten by Daki. Muzan rebuked Daki for caring about the human, then asked whether Takanashi had a child.
After the Demon Slayers defeated Daki, Haruto and the others celebrated their survival while Miyamaru Rei discussed rebuilding the ruined Yoshiwara. Akaza was summoned to the Infinity Castle, where Muzan announced that Gyutaro was dead.
Muzan rebuked the Upper Ranks and warned Akaza that he was watching him closely. After returning to Headquarters, Haruto learned about a new Wisteria House in Yoshiwara and realized Miyamaru Rei had tricked him about the Shibamoto family's motives.
After burying Sōma, Haruto returned with Kagaya to study records on the Demon Slayer Mark and the Bright Red Nichirin Sword. Haruto spotted a strange corner on Kagaya’s desk, pressed it, and triggered a hidden shaft that sent them plunging underground.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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, 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.
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.
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.
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.
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.
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 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.
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.
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.