Chapter Summaries

Kibutsuji Muzan transported the Demon Slayer Corps into the Infinity Castle and unleashed demons with strength comparable to Lower Ranks, overwhelming ordinary swordsmen. Riezel deployed hundreds of powerful clockwork puppets to turn the tide against the weaker demons, while the Hashira still had to face the Upper Ranks.

• Kibutsuji Muzan scattered Riezel, the Hashira, and the Demon Slayer Corps throughout the Infinity Castle as the final battle began.
• Kasugai Crows directed the scattered Corps members to gather east, but groups of powerful demons attacked and inflicted heavy casualties.
• The Hashira recognized the demons as humans Kibutsuji Muzan had transformed with large quantities of blood, giving them strength comparable to Lower Ranks.
• Kibutsuji Muzan watched in alarm as mysterious warriors resembling Tsugikuni Yoriichi appeared throughout the castle and killed demons with ease.
• Riezel deployed several hundred Type One clockwork puppets, each comparable to a Hashira-level swordsman, to support the Corps.
• Riezel left the fight against the Upper Rank Demons to the Hashira.

In Infinity Castle, Zenitsu told Tanjiro and Inosuke about his fellow disciple Kaigaku, who had become a demon. The three encountered Kaigaku, now Upper Rank Seven, and learned Muzan had reorganized the Kizuki into seven Upper Ranks.

• Zenitsu rushed through Infinity Castle searching for someone, while Tanjiro and Inosuke worried about his recent change in behavior.
• Zenitsu explained that his master, the former Thunder Pillar, had trained him and another disciple, who mastered five forms of Thunder Breathing.
• Kaigaku appeared and revealed that he had chosen to become a demon because humans had limits.
• Zenitsu recognized Kaigaku, and Tanjiro noticed the Upper Rank and Seven markings in his eyes.
• Kaigaku explained that Muzan had abolished the Lower Ranks and added a seventh Upper Rank seat, creating the new Kizuki of seven Upper Rank Demons.

The Hashira encountered several replacement Upper Rank demons in Infinity Castle as the Kasugai Crows tracked their battles. Mitsuri Kanroji and Muichiro Tokito fought Upper Rank Six, Tengen Uzui and Obanai Iguro attacked Upper Rank Five, and Sanemi Shinazugawa and Giyu Tomioka faced Upper Rank Four, whose split forms reappeared.

• Hoshi sent his demonized tigers to hunt Demon Slayers until Mitsuri Kanroji and Muichiro Tokito arrived and killed several of them.
• Hoshi ordered his remaining tigers to attack Mitsuri Kanroji and Muichiro Tokito, while the Kasugai Crows announced the Hashira had joined the battle against Upper Rank Six.
• Tengen Uzui and Obanai Iguro rushed toward Mitsuri Kanroji but Nakime used her biwa to disorient them; they landed safely and recognized her as the replacement Upper Rank Five.
• Tengen Uzui and Obanai Iguro charged Nakime to stop her from playing the biwa.
• Sanemi Shinazugawa and Giyu Tomioka encountered Hantengu and cut him into four pieces, but he split into the four demons of Joy, Anger, Sorrow, and Pleasure.

Rengoku Kyojuro encountered Akaza in Infinity Castle and prepared to settle their unfinished battle from the Infinite Train. As their fight began, Riezel learned of the confrontation and believed Rengoku Kyojuro would win.

• Rengoku Kyojuro called Akaza out in a martial arena, and Akaza revealed that he had survived decapitation by breaking a demon's limit through sheer will.
• Akaza described how Tsugikuni Yoriichi had once beheaded him and warned that the human who defeated several Upper Ranks was the truly dangerous one.
• Akaza sensed that Rengoku Kyojuro had entered a realm where his fighting spirit was concealed, while Rengoku drew his blade and declared their rematch destined.
• Rengoku Kyojuro awakened a crimson mark and wielded a fiery red Nichirin Blade as Akaza activated Destructive Death: Compass Needle and asked him to become a demon; Rengoku refused.
• Rengoku Kyojuro and Akaza clashed, and the Kasugai Crow reported their battle throughout Infinity Castle.
• Riezel heard that Rengoku Kyojuro was fighting Akaza and believed the outcome would differ from the original story.

Shinobu Kocho confronted Doma, Upper Rank Two, and learned that Gyomei Himejima had joined her at the Lotus Pond. They prepared to fight together against the demon who killed Shinobu's older sister.

• Shinobu ignored her Kasugai Crow's directions and found Doma at a Lotus Pond inside Infinity Castle.
• Shinobu identified Doma as the demon who killed her older sister, the Flower Hashira, and attacked him.
• Shinobu dodged Doma's icy Blood Demon Art and revealed that Riezel's treatment had removed the wisteria poison she had prepared to use against Doma.
• Shinobu turned her Nichirin Blade red and vowed to behead Doma with her Demon Slayer Mark.
• Gyomei Himejima arrived to join Shinobu, and Doma grew uneasy at the two Hashira's combined threat.

The Hashira and Upper Rank Demons began fighting across Infinity Castle while Zenitsu, Tanjiro, and Inosuke confronted Upper Rank Seven Kaigaku. After Zenitsu struck off Kaigaku’s arm and learned that his former master had killed himself over Kaigaku’s betrayal, the three swordsmen joined the battle, and Riezel sensed something below as he watched from above.

• The Kasugai Crow’s report announced that all nine current Hashira had entered battle against the Upper Rank Demons.
• Kaigaku boasted that demons would win and challenged Zenitsu, who confronted him over the death of their former master.
• Zenitsu used Thunder Breathing First Form to cut off Kaigaku’s arm and condemned him for becoming a demon and looking down on humans.
• Tanjiro and Inosuke joined Zenitsu, and the three began fighting Kaigaku together.
• Riezel received reports from the Kasugai Crows, judged that the trio could defeat Kaigaku, and then stopped in midair to look down.

Riezel confronted Upper Rank One Kokushibo at the palace altar and challenged him over his claim to Tsugikuni Yoriichi’s name. Kokushibo revealed the jealousy and fear of death that drove him to become a demon, then vowed to kill Riezel.

• Riezel arrived at the palace’s open-air altar and found Kokushibo beneath the moon mural.
• Kokushibo tested Riezel with a Moon Breathing slash, but Riezel stopped it with two fingers and sent him sliding back with a kick.
• Riezel identified Kokushibo as Tsugikuni Michikatsu, Yoriichi’s older brother, and accused him of ruining Yoriichi’s life by betraying the Demon Slayer Corps.
• Kokushibo insisted that Michikatsu was dead and explained that he envied Yoriichi’s talent and became a demon to gain time to surpass him.
• Kokushibo erupted with killing intent and vowed to kill Riezel for using Yoriichi’s name and Breathing Techniques.

Riezel overwhelmed Kokushibo in their battle at the summit of the Infinity Castle without drawing his sword. After asking where the throne was, Riezel left Kokushibo as his remaining target was Kibutsuji Muzan.

• A Kasugai Crow announced that Chief Instructor Tsugikuni Yoriichi had engaged Upper Rank One, drawing the attention of fighters across the Infinity Castle.
• Kokushibo attacked Riezel with Moon Breathing, but Riezel parried his moon blades and evaded his slashes.
• Kokushibo unleashed a wide-ranging storm of cuts that tore apart the palace, but Riezel emerged unharmed and kicked him into a pillar.
• Riezel blasted Kokushibo out of the rubble with flames, leaving him badly burned and coughing blood.
• Kokushibo accused Riezel of looking down on him, and Riezel said he had spared him only to ask where the throne was.

Riezel fought Kokushibo through a fierce exchange of Sun and Moon Breathing techniques in the ruined palace. Riezel’s final attack defeated Kokushibo, who fell silent beside the fallen sun and moon murals.

• Kokushibo transformed his flesh into a massive Demon Blade and unleashed a series of powerful Moon Breathing attacks against Riezel.
• Riezel countered Kokushibo’s slashes with Sun Breathing, using his scabbard and Mirage Sun Rainbow to evade and strike from behind.
• Kokushibo demanded that Riezel acknowledge him and challenged him to defeat him before reaching Muzan.
• Kokushibo unleashed Moon Breathing’s Sixteenth Form, Moonbow: Lone Remaining Moon, as the palace collapsed around them.
• Riezel drew his Nichirin Blade, vaporized Kokushibo’s attacks, and cut him with Sun Breathing’s Twelfth Form, Flame Dance.
• Riezel sheathed his sword and asked Kokushibo if he was satisfied, but Kokushibo remained silent beside the fallen moon mural.

Riezel defeated Kokushibo with one slash, leaving Kokushibo to confront his lifelong envy of Tsugikuni Yoriichi before he turned to ash. Tamayo and Yushiro joined Riezel to guide him toward Kibutsuji Muzan, while news of Kokushibo’s defeat shook both the Demon Slayer Corps and the demons still fighting.

• Kokushibo remembered how the aged Tsugikuni Yoriichi nearly killed him with one slash and how that defeat had haunted him for centuries.
• Kokushibo asked Riezel why he could never defeat him, then died as his head and body fell apart.
• Tamayo and Yushiro appeared from the ruins, and Tamayo offered to lead Riezel to the throne room.
• Riezel, Tamayo, and Yushiro set off toward Kibutsuji Muzan as the Kasugai Crow announced Kokushibo’s defeat and zero casualties.
• The Demon Slayer Corps celebrated the news while Kaigaku struggled to believe Kokushibo had lost, and Zenitsu taunted him about the humans defeating Kibutsuji Muzan.

Riezel confronted Kibutsuji Muzan in Infinity Castle, rejecting Muzan’s offer to become immortal and arguing that he needed no personal grudge to kill him. Muzan attacked, and Riezel prepared to fight as the final battle began.

• Riezel reached Muzan’s throne and destroyed it with a sword strike, while Muzan dodged and faced him.
• Tamayo and Yushiro appeared beside Riezel, and Tamayo confronted Muzan over the revenge she had awaited for hundreds of years.
• Muzan questioned why people sought revenge and offered Riezel half his blood so they could become immortal Demon Kings together.
• Riezel rejected Muzan’s reasoning, pointing out that Muzan had killed people without personal grudges and mocking his comparison to a natural disaster.
• Muzan transformed and attacked Riezel with a thorn whip, but Riezel evaded the blow while protecting Tamayo and Yushiro.
• Riezel sent Tamayo and Yushiro aside and prepared to fight as a Kasugai Crow relayed news of the battle.

Ubuyashiki Kagaya, the Demon Slayer Corps, and those watching awaited the outcome as Riezel and Kibutsuji Muzan fought. Tamayo refused to leave the battlefield, and the chapter ended with Muzan unleashing all seventeen Whip-like Appendages at Riezel.

• Ubuyashiki Kagaya sat with Amane Ubuyashiki and their children beneath the moon, believing the battle would determine whether the Ubuyashiki Clan's curse ended.
• Gyomei Himejima, Shinobu Kocho, Rengoku Kyojuro, Sanemi Shinazugawa, Giyu Tomioka, Obanai Iguro, Tengen Uzui, Mitsuri Kanroji, Muichiro Tokito, Zenitsu, and Inosuke fought Upper Ranks while praying to win.
• Tanjiro unleashed the Sun Breathing Dance of the Fire God, sending his call to win across the battlefield.
• Riezel and Kibutsuji Muzan collided on the throne, producing a shockwave that shook the cliff-like structure.
• Tamayo refused Yushiro's attempt to take her to safety and stood her ground to witness Muzan's defeat.
• Muzan appeared amid another shockwave and attacked Riezel with all seventeen Whip-like Appendages.

Riezel fought Kibutsuji Muzan, whose strength had grown to rival a high-level adventurer, through the ruins of a massive building. Riezel ultimately severed Muzan’s head, leaving the outcome of the battle unresolved.

• Riezel surprised Kibutsuji Muzan with a Sun Breathing strike, but Muzan evaded it and revealed that he had grown far stronger by consuming people.
• Riezel attacked with Sun Breathing’s Seventh and Tenth Forms, piercing Muzan’s thorn whips and cutting away his arms and several appendages.
• Kibutsuji Muzan unleashed a destructive Blood Demon Art Shockwave, and Riezel defended himself with Sun Breathing’s Second Form before retreating.
• Muzan pursued Riezel down the building’s wall, and the two fought fiercely until their battle brought the gigantic structure crashing down.
• Riezel struck Muzan repeatedly with Sun Breathing’s Eleventh Form and then severed his head with a circular slash.

Riezel fought Kibutsuji Muzan through the collapsing throne hall, using his Sun Breathing and Hermit's blade to overcome Muzan's transformations and attacks. He unveiled the thirteenth form by chaining all twelve forms together and burned Muzan's body to nothing, leaving his final fate uncertain.

• Tamayo warned Yushiro that Muzan would not die from decapitation, and Muzan transformed his severed head into a maw to attack Riezel.
• Riezel cut apart Muzan's transformed head and wounded him with slashes that delayed his regeneration.
• Muzan unleashed Black Blood Thorn, but Riezel burned through the attack with Halo Dragon Head Dance.
• Muzan's shockwave destroyed the throne hall and his giant infant form struck at Riezel with a massive punch.
• Riezel linked the twelve Sun Breathing forms into the thirteenth form, which destroyed Muzan's giant body and burned Muzan to nothing.

Riezel defeated Kibutsuji Muzan and trapped his scattered fragments in a magical barrier, while the Demon Slayer Corps eliminated Nakime and all seven Upper Rank Demons without casualties. Muzan reassembled his head inside the barrier and demanded to know why as he faced Riezel.

• Riezel burned away Kibutsuji Muzan's body, and Muzan exploded into fragments to escape before Riezel sealed them inside a shrinking barrier.
• Muzan called for Nakime to transfer him out of Infinity Castle, but Kasugai Crows reported that Obanai Iguro and Tengen Uzui had defeated her.
• Riezel explained that he had prepared the Hashira to target Nakime and could have interfered with her Blood Demon Art himself.
• Kasugai Crows reported that Mitsuri Kanroji and Muichiro Tokito, Sanemi Shinazugawa and Giyu Tomioka, Gyomei Himejima and Shinobu Kocho, and Rengoku Kyojuro had defeated the remaining Upper Ranks.
• Tanjiro, Zenitsu, and Inosuke defeated Kaigaku, completing the elimination of all seven Upper Rank Demons with zero casualties.
• Muzan's fragments reassembled into his head inside the barrier, and he stared at Riezel with fear and hatred before asking why.

Riezel destroyed Kibutsuji Muzan and the Blue Spider Lily, ending the demon threat. The Demon Slayer Corps celebrated their victory, while Ubuyashiki Kagaya's curse lifted and his family welcomed a new day.

• Riezel told Kibutsuji Muzan that his death would protect the lives of those he had endangered, then burned the Blue Spider Lily.
• Kibutsuji Muzan declared that Riezel and Tsugikuni Yoriichi were the real monsters before Riezel erased him with Decomposition Magic.
• The demons throughout Infinity Castle vanished, and the Demon Slayer Corps learned that Kibutsuji Muzan had been eliminated.
• Mitsuri Kanroji, Muichiro Tokito, Gyomei Himejima, Shinobu Kocho, and the other swordsmen celebrated the victory.
• At Swordsmith Village, Ubuyashiki Kagaya stood again as the Ubuyashiki Clan's curse faded, and his family embraced beneath the sunlight.

After the Demon Slayer Corps defeated Kibutsuji Muzan and the demons, Ubuyashiki Kagaya gathered the Hashira to assess the losses and announce the Corps’ dissolution. He thanked Riezel for ending the thousand-year conflict, and the Corps disbanded with no demons left in the world.

• Ubuyashiki Kagaya welcomed the Hashira and heard Gyomei Himejima report about forty Corps members dead and around ten severely injured or disabled.
• Ubuyashiki Kagaya ordered support for the fallen members’ families and disabled survivors, while Shinobu Kocho offered free treatment through the Butterfly Mansion.
• Ubuyashiki Kagaya declared that the Corps had fulfilled its purpose and that this was the final Hashira Meeting.
• Ubuyashiki Kagaya and the Hashira bowed to Riezel and thanked him for defeating Kibutsuji Muzan and ending the demons’ reign.
• Ubuyashiki Kagaya gave Riezel a jade token and officially disbanded the Demon Slayer Corps.

After the Demon Slayer Corps disbanded, Riezel revealed his true name and left the Swordsmith Village, while Tamayo and Yushiro planned to become human again. Before departing, Tamayo gave Riezel a unique medicine that could rapidly heal fatal injuries and revive someone who had recently died.

• Riezel removed the Demon Slayer Marks from the Hashira, and the surviving Demon Slayers made plans for ordinary lives after the Corps disbanded.
• Riezel told Ubuyashiki Kagaya, Rengoku Kyojuro, and Tanjiro that his real name was Riezel, then vanished after leaving the Swordsmith Village.
• Tamayo and Yushiro met Riezel in the mountains, where Tamayo said she had developed a Human Transformation Medicine and intended to become human again with Yushiro.
• Tamayo gave Riezel a one-dose medicine made from diluted Kibutsuji Muzan's blood that could rapidly heal severe injuries and revive someone who had recently died.
• Tamayo and Yushiro departed, and Riezel put the medicine away.

Riezel met Tsugikuni Yoriichi in a Dreamscape, where Yoriichi thanked him for defeating Kibutsuji Muzan and explained that he was ready to leave for reincarnation. Before Yoriichi departed, Riezel asked him to fight one last time.

• Riezel decided to spend the remaining half month of his Dimensional Travel relaxing after reaching the limits of his growth and finishing his work in the Demon Slayer world.
• A familiar wind chime sound carried Riezel into a Dreamscape, where he met Tsugikuni Yoriichi face-to-face for the first time.
• Tsugikuni Yoriichi thanked Riezel for defeating Kibutsuji Muzan and said that Riezel had fulfilled the task he had failed to accomplish in life.
• Tsugikuni Yoriichi explained that his lingering regrets had ended and that he was leaving to enter the cycle of reincarnation.
• Riezel summoned his Nichirin Blade Hermit and asked Tsugikuni Yoriichi to fight him once before he left.

Riezel challenged Tsugikuni Yoriichi to a spar, hoping to find an opponent who could push him toward a great feat. Yoriichi revealed that Riezel’s evolved Sun Breathing had inspired him to reach Lv.7 after death, and their battle began with Yoriichi nearly cutting Riezel down.

• Riezel challenged Tsugikuni Yoriichi to a spar, and Yoriichi accepted.
• Riezel drew Hermit and prepared to fight with all his strength while Yoriichi concealed his presence.
• Tsugikuni Yoriichi suddenly appeared before Riezel and slashed at him, forcing Riezel to evade with Sun Breathing: Fourth Form - Mirage Sun Rainbow.
• Riezel realized Yoriichi’s strike had cut a strand of his hair and concluded that Yoriichi had reached Lv.7.
• Tsugikuni Yoriichi explained that watching Riezel evolve Sun Breathing had inspired him to strengthen his entire body and advance to a new realm after death.