Chapter Summaries

After Uchiha Meikyō killed Upper Rank Three and the Tokito Brothers defeated Lower Rank Six, the Demon Slayer Corps celebrated the upheaval while its swordsmen pushed themselves to grow stronger. Meikyō and the brothers traveled to the Swordsmith Village to obtain new Nichirin Blades.

• Ubuyashiki Kagaya celebrated Meikyō’s slaying of Upper Rank Three and learned that Tokito Ichiro and Tokito Muichiro had killed Lower Rank Six.
• Shinazugawa Sanemi resolved to awaken the Transparent World and sparred with Himejima Gyomei, while Uzui Tengen praised Meikyō and the brothers.
• Tanjiro Kamado trained by pushing a boulder, and Rengoku Kyojuro encouraged him to keep working hard despite his slower progress.
• Kochō Shinobu injected herself with wisteria poison and thought that Meikyō might be the one most likely to kill Doma.
• Uchiha Meikyō and the Tokito Brothers went to the Swordsmith Village to have new Nichirin Blades forged, since Meikyō’s blade had melted and become unusable.

Meikyō explained how high temperatures could turn Nichirin Blades crimson and asked Tetsujin Kawahara Teijo to forge several new swords. After returning to Konoha, Meikyō left a Shadow Clone in the Swordsmith Village and found Uchiha Tatsu bringing young Shisui to meet him.

• Kanemori Tetsuzo grieved over Meikyō’s ruined Nichirin Blade until Tetsujin Kawahara Teijo scolded him for forging a sword that could not withstand battle.
• Meikyō demonstrated how his Fire Style heated Ama-no-Ohabari and explained that a Crimson Blade could hinder Upper Rank Three’s regeneration.
• Meikyō turned the Tokito Brothers’ blades crimson by striking them together and lent Ama-no-Ohabari to Tetsujin Kawahara Teijo for examination.
• Meikyō asked Tetsujin Kawahara Teijo to forge several extra Nichirin Blades, while the Tokito Brothers requested swords suited to their twin combat tactics.
• Meikyō returned to Konoha after visiting the Swordsmith Village hot springs and left a Shadow Clone there while the new blades were being forged.
• Uchiha Tatsu brought his four-year-old son, Shisui, to meet Meikyō and told him to be polite.

Meikyō discovered that his uncle Uchiha Tatsu had a severe lung disease and promised to help him seek treatment so he could live to see Shisui grow up. He also found that Shisui had awakened his Sharingan early and warned him to keep it secret as they went to consult Uchiha Yu.

• Meikyō welcomed Uchiha Tatsu and Shisui, then sent Shisui to read while he spoke privately with Tatsu.
• Meikyō identified Tatsu’s lung disease and learned that doctors had given him at most a year to live.
• Meikyō promised to take Tatsu to Tsunade for treatment that could ease his condition and extend his life.
• Meikyō discovered Shisui had awakened his Sharingan while overhearing their conversation and warned him not to reveal it before age ten.
• Meikyō, Tatsu, and Shisui went to Uchiha Yu’s home, where Yu was shocked by Shisui’s early awakening and repeated Meikyō’s warning.

Meikyō received Kagami Uchiha’s detailed notes on the Mirror Body Flicker Technique and learned that his perception could help him master it. He assisted Tsunade in operating on Uchiha Tatsu, whose recovery could give him more time with his child, and Tsunade recognized Meikyō’s exceptional potential as a medical ninja.

• Uchiha Yu decided to cultivate Uchiha Shisui as another future pillar of the clan.
• Uchiha Tatsu thanked Meikyō and gave him Kagami Uchiha’s notes on the Mirror Body Flicker Technique.
• Meikyō realized that his perception and the notes could help him learn the technique after studying the Summoning and Reverse Summoning Techniques.
• Meikyō brought Uchiha Tatsu to Tsunade, who warned that surgery could leave him only ten to fifteen years to live, but Tatsu chose to proceed.
• Tsunade and Meikyō operated on Uchiha Tatsu, and Tsunade saw that Meikyō’s precision and medical talent were exceptional.

Meikyō signed a summoning contract with Katsuyu and sought Tsunade’s help learning the Mirror Body Flicker Technique. Tsunade directed him to Minato and Kushina, whom he visited to ask for guidance.

• Tsunade recognized Meikyō’s talent for Medical Ninjutsu and formally accepted him as her disciple.
• Meikyō signed Katsuyu’s summoning scroll, and Tsunade recommended Minato and Kushina as guides for the Mirror Body Flicker Technique.
• Tsunade exchanged Meikyō’s money for a scroll containing advanced Medical Ninjutsu training methods.
• Uchiha Tatsu recovered from his operation and went to watch Shisui train at the Uchiha Clan Compound.
• Meikyō visited Minato and Kushina with fruit and explained that he wanted their help with the Mirror Body Flicker Technique.

Meikyō learned the Mirror Body Flicker Technique with Minato and Kushina’s help, then succeeded in using a clone to reverse-summon between locations. In the Demon Slayer World, his Shadow Clone combined Sun Breathing with Uchiha swordsmanship to create a rudimentary technique called Sun Halo Dragon Dance.

• Minato taught Meikyō the Flying Thunder God Technique, while Kushina shared advanced Sealing Technique knowledge.
• After forty-seven attempts, Meikyō successfully used a Shadow Clone to perform the Mirror Body Flicker Technique and reverse-summon to his clone.
• Meikyō trained with Minato and began using the Mirror Body Flicker Technique in combat with two Shadow Clones.
• In Swordsmith Village, Meikyō’s Shadow Clone studied Sun Breathing and Uchiha Style Swordsmanship.
• The Shadow Clone combined Sun Halo Dragon: Head Dance with Sun Halo Dance and named the unfinished technique Sun Halo Dragon Dance.

Meikyō practiced a new sword technique while Muzan learned that a Sun Breathing swordsman had killed Akaza. Fearing the inheritor could become a threat, Muzan summoned the Twelve Kizuki to the Infinite Castle, where the demons gathered and wondered why Akaza was absent.

• Meikyō left the hot spring and practiced refining his Uchiha Style: Sun Breathing: Sun Halo Dragon Dance.
• Kokushibo told Muzan that Akaza had been killed by a Sun Breathing user, but that the swordsman was not Tsugikuni Yoriichi.
• Kokushibo suggested that the Demon Slayer Corps' Yoriichi puppet might have been mistaken for the swordsman, while concluding that someone had inherited Sun Breathing.
• Muzan ordered Nakime to summon all the Twelve Kizuki and Kaigai, intending to eliminate the Sun Breathing inheritor.
• The Lower Rank demons gathered with the Upper Ranks in the Infinite Castle, and Doma wondered why Akaza had not arrived.

Muzan assigned Doma, Gyokko, and Hantengu to attack Swordsmith Village while searching for the Blue Spider Lily and the Sun Breathing swordsman. At the village, Meikyō completed a powerful new technique, and the Tokito brothers discovered demons had invaded.

• Kokushibo announced Akaza's death, and Muzan reshuffled the Upper Rank positions and ordered the demons to find the Blue Spider Lily and kill the Sun Breathing user.
• Gyokko offered intelligence about Swordsmith Village, so Muzan sent him and Hantengu to attack it, with Doma joining them.
• Meikyō tested his completed Sun Halo Dragon Dance, which burned through a large stretch of forest despite his restraint.
• Kōtetsu refused to lend the Tokito brothers the key to Yoriichi Type Zero, fearing they would break the doll again.
• Tokito Yuichiro and Tokito Muichiro killed a monstrous fish demon attacking Mr. Kanemori and rushed toward Swordsmith Village to help the villagers.

Upper Rank demons attacked the Swordsmith Village, and Meikyō rushed to help without his own Nichirin Blade. As Kōtetsu activated Yoriichi Type Zero against Hantengu, Muzan mistook the puppet for Tsugikuni Yoriichi and ordered Hantengu to destroy it.

• Gyokko attacked the village with poisonous fish, and the Tokito Brothers confronted him with Mist Breathing.
• Meikyō reached Kōtetsu and Yoriichi Type Zero, then borrowed a Nichirin Blade from the puppet.
• Muzan ordered Doma and Hantengu to search for the Sun Breathing swordsman, and Doma departed while Hantengu wandered through the village.
• Hantengu spotted Yoriichi Type Zero, and Muzan recognized Tsugikuni Yoriichi's face before realizing the figure was a puppet.
• Muzan ordered Hantengu to tear Yoriichi Type Zero apart, so Kōtetsu activated the puppet and fled to warn the Hashira.

Uchiha Meikyō fought Upper Rank Two Doma in Swordsmith Village, using Fire Style and new techniques to counter Doma’s ice and clones. As Meikyō attacked Doma’s true body, Doma summoned his Water Lily Bodhisattva, while Gyokko transformed into his final form.

• Doma recognized Meikyō as the swordsman who had killed Akaza and attacked him with his ice-based Blood Demon Arts.
• Meikyō countered Doma’s attacks with Fire Style and planned to use Tsunade’s Delicate Illness Extraction Technique to remove any ice crystals he inhaled.
• Meikyō used the Mirror Body Flicker Technique and sword techniques to destroy Doma’s ice clones and create an opening against his true body.
• Meikyō charged at Doma with his flaming Nichirin Blade, but Doma summoned the Water Lily Bodhisattva.
• Gyokko saw Doma’s ultimate technique and transformed into his final form.

Meikyō destroyed Doma’s Water Lily Bodhisattva with Sun Halo Dragon Dance, then severed Doma’s head and hacked his body apart to prevent him from regenerating. After sealing the last scraps of flesh for future research, Meikyō prepared to hunt the other demons in Swordsmith Village.

• Hantengu watched in terror as Doma’s Water Lily Bodhisattva overwhelmed Meikyō and Yoriichi Type Zero struggled against Hantengu’s four clones.
• Meikyō decided to use Sun Breathing and confront Doma’s Water Lily Bodhisattva head-on, despite the ice crystals entering his body.
• Meikyō unleashed Uchiha Style · Sun Breathing · Sun Halo Dragon Dance and shattered the Water Lily Bodhisattva before reaching Doma.
• Meikyō severed Doma’s head, then struck him 191 times and sealed the remaining flesh in a test tube.
• Meikyō felt pain in his chest after the fight and set out to find the other demons in Swordsmith Village.

Meikyō recovered from Doma’s ice attack, then killed Hantengu by locating and destroying his true body despite Zohakuten’s interference. He returned to Swordsmith Village after the battles ended, where the Demon Slayers celebrated the fall of four Upper Rank demons.

• Meikyō used the Delicate Illness Extraction Technique to remove ice crystals from his body, then went to confront Hantengu after Kōtetsu reported the threat.
• Meikyō decapitated Aizetsu and fought Zohakuten while a clone held the demon off and he searched for Hantengu’s true body.
• Meikyō found the Cowardice Demon, fought through Hantengu’s Resentment Demon form, and destroyed Hantengu with Sun Breathing’s Thirteenth Form before sealing what remained.
• Meikyō returned to Yoriichi Type Zero’s wreckage, collected its Nichirin Blade, and headed back toward the village center.
• Meikyō learned that the Tokito Brothers had killed Gyokko, then told the gathered swordsmen that he had killed Doma, Akaza, and Hantengu as they celebrated the Upper Ranks’ defeat.

After the Swordsmith Village attack, Ubuyashiki Kagaya learned that Meikyō had slain Upper Rank Two and the new Upper Rank Three, while Muichiro and Ichiro had defeated Upper Rank Five. Meikyō received a new Nichirin Blade and was summoned to the Hashira Meeting, where the Tokito brothers were welcomed and Shinazugawa was teased about mastering the Transparent World.

• A Kakushi reported to Ubuyashiki Kagaya that the Swordsmith Village had suffered casualties but its swordsmiths had been largely protected, and that Meikyō, Muichiro, and Ichiro had slain three Upper Rank demons.
• Ubuyashiki Kagaya ordered that the news be shared with the Hashira and called another Hashira Meeting.
• Tetsujin Kawahara Teijo presented Meikyō with the Demon Slayer Blade and agreed to have Haganezuka Hotaru restore the rusted blade Meikyō had found inside Yoriichi Type Zero.
• A Kasugai Crow summoned Meikyō to headquarters for the Hashira Meeting, and he left the village.
• At headquarters, Rengoku Kyojuro praised the Tokito brothers for defeating an Upper Rank demon, while Shinazugawa Sanemi warned them they still needed to grow stronger.
• Uzui Tengen teased Shinazugawa Sanemi for not yet mastering the Transparent World, and Sanemi said he would master it soon.

At the Hashira meeting, the Hashira discussed Meikyō’s recent victories and Ubuyashiki Kagaya praised the Corps’ success against the Upper Ranks. The meeting left Muzan Kibutsuji’s forces weaker than they had been in a thousand years, while Meikyō observed Kagaya’s leadership with respect.

• Shinazugawa Sanemi confronted Tomioka Giyuu after Giyuu questioned why Sanemi had not mastered the Transparent World, and Iguro Obanai took Giyuu’s remarks as an insult to the Hashira.
• Meikyō arrived at the Hashira meeting, and Kochō Shinobu asked whether he had truly killed Upper Rank Two; Meikyō confirmed it had taken one hundred ninety-one slashes.
• Ubuyashiki Kagaya arrived with Oyakata Amane and announced that Meikyō had slain the former Upper Rank Three, Upper Rank Two, and the new Upper Rank Three, while Ichiro and Muichiro had defeated the current Upper Rank Four.
• Ubuyashiki Kagaya thanked Meikyō and the Hashira, bowing deeply to honor their battles against demons.
• Meikyō watched Kagaya’s gesture and reflected that he respected Kagaya’s sincere personal charisma, though he would not readily serve beneath another.

Meikyō proposed a plan to lure Muzan with a fake Blue Spider Lily, bringing Tamayo and Shinobu into the effort. The chapter ended as he prepared a glowing, poisoned flower and gave Tamayo demon samples to study.

• Ubuyashiki Kagaya announced that the Demon Slayer Corps would seek to destroy Muzan, and Meikyō proposed a way to lure him out.
• Several days later, Shinazugawa Sanemi threatened Tamayo and Yushiro at Butterfly Mansion until Ubuyashiki Kagaya vouched for Tamayo.
• Kochō Shinobu welcomed Tamayo, while Meikyō used Yang-natured Chakra to grow an ordinary Spider Lily for his plan.
• Meikyō explained that he would disguise a poisoned flower as the Blue Spider Lily and use it to draw Muzan out.
• Meikyō gave Tamayo samples from Doma, Akaza, and Hantengu, and mentioned that blood from the Kamado family could also aid her research.

Meikyō, Tamayo, and Kochō Shinobu prepared a plan to poison Muzan Kibutsuji and kill him while he was weakened. The Demon Slayer Corps publicized a Blue Spider Lily, prompting Daki to alert Muzan Kibutsuji that the flower he sought had appeared.

• Meikyō gave Tamayo blood samples from the Kamado family to help develop a medicine that could turn demons into humans, and explained that he would not use Muzan Kibutsuji's power.
• Tamayo revealed poisons designed to stop Muzan Kibutsuji from splitting apart and to accelerate demon aging, while Kochō Shinobu added Wisteria Flower Poison concentrated two thousand times.
• Meikyō proposed combining the medicine and poisons with blue pigment and fluorescent powder, then infusing the mixture into a Spider Lily.
• Shinazugawa Sanemi brought Kitasato Shibasaburō to meet Ubuyashiki Kagaya, and Meikyō produced a blue Spider Lily for Kitasato to present as a discovery.
• Kitasato published a paper and announced the Blue Spider Lily's discovery, while the Ubuyashiki family spread the news across Japan.
• Daki, posing as Warabihime, read about the Blue Spider Lily and alerted Muzan Kibutsuji that it had appeared.

Muzan became convinced that a newspaper report had revealed the Blue Spider Lily and personally went to retrieve it. After eating a flower planted as a trap, he was caught in an ambush and transported with the Demon Slayer Corps into the Infinity Castle.

• Muzan learned from Daki that a newspaper reported the discovery of the Blue Spider Lily and decided to obtain it himself.
• Muzan went to the Tokyo University Biological Research Institute and ate the glowing blue flower he found there.
• A blast destroyed the institute, and Muzan regenerated amid the assembled Demon Slayer Corps swordsmen.
• Kochō Shinobu revealed that the flower was fake and contained a cure developed by her and Sister Tamayo to turn Muzan human.
• Muzan commanded Nakime to act, and she sent the assembled fighters into the Infinity Castle, where Kochō Shinobu landed in a lotus-filled courtyard.

The Demon Slayer Corps battled demons throughout the Infinite Castle as Kaigaku was killed by Daki and Meikyō confronted Enmu. The fighting continued, with Meikyō trapping Enmu in a brief Sharingan illusion.

• Shinobu charged Koyuki, while Giyuu and Tanjiro faced Kaigai, Rui, and a mass of demons in the shifting castle.
• The Tokito Brothers confronted Rokuro and Yahaba, while Iguro and Mitsuri encountered Nakime.
• Daki killed Kaigaku and ate him before Tengen arrived and prepared to fight her.
• Kagaya coordinated the Corps’ operation from headquarters with Yushiro’s aid and the protection of three former Hashira.
• Meikyō found Enmu hypnotizing Demon Slayers, resisted his Blood Demon Art, and trapped him in a Sharingan illusion.

Meikyō defeated Enmu and followed the Kasugai Crow’s directions while Rengoku Kyojuro and Himejima Gyomei fought Kokushibo in the Infinite Castle. The battle turned against the Hashira as Kokushibo became stronger, and Meikyō arrived nearby.

• Meikyō beheaded Enmu and asked the Kasugai Crow where he should go next.
• Rengoku Kyojuro and Himejima Gyomei attacked Kokushibo together, and he praised their skills while deflecting their strikes.
• Kokushibo urged the Hashira to become demons, but Rengoku and Gyomei rejected his offer and fought on.
• Rengoku and Gyomei awakened their Crimson Blades and coordinated an assault that crushed much of Kokushibo’s body, but he regenerated and grew stronger.
• Kokushibo regained his head and transformed further, overpowering Rengoku and Gyomei as Meikyō arrived nearby.

Meikyō used Transformation Jutsu to resemble Tsugikuni Yoriichi and reminded Kokushibo of his lost dream, causing him to accept his appearance and turn to ash. After learning that Muzan was hiding and an Upper Rank Biwa Demon controlled space, Meikyō sent Rengoku Kyojuro and Himejima Gyomei toward Muzan while he planned to deal with the demon.

• Meikyō transformed into a likeness of Tsugikuni Yoriichi and approached Kokushibo as Rengoku Kyojuro and Himejima Gyomei fought him.
• Meikyō recalled Kokushibo’s childhood dream of becoming the strongest warrior and showed him his monstrous reflection in a blade.
• Kokushibo let go of his obsession, turned to ash, and left his tattered haori and repaired bamboo flute behind.
• Meikyō revealed his identity to Rengoku Kyojuro and Himejima Gyomei after they challenged him, then explained his disguise and knowledge of Kokushibo.
• A Kasugai Crow reported that Kochō Shinobu and Shinazugawa Sanemi were attacking Muzan’s hiding place and that an Upper Rank Biwa Demon was nearby.
• Meikyō proposed that Rengoku Kyojuro and Himejima Gyomei join the Hashira to delay Muzan while he dealt with the space-controlling demon, explaining that they needed her to transport Muzan out of the Infinity Castle.