Chapter Summaries

Teiichi safely stopped Inosuke’s gunpowder attack at the Butterfly Mansion, then agreed to spar with Tanjiro. Tanjiro opened the match with Hinokami Kagura, and the two clashed as Teiichi blocked his strikes.

• Inosuke hurled four balls of gunpowder at Teiichi, who redirected them with his wooden sword and caught them without letting them explode.
• Teiichi ended the fight, but Inosuke charged again and was knocked unconscious by several quick strikes.
• Tanjiro asked Teiichi for a match, while Zenitsu dragged the unconscious Inosuke aside.
• Tanjiro used Hinokami Kagura and launched his Dance Flash attack at Teiichi.
• Teiichi met Tanjiro’s attack with his wooden sword, and they continued exchanging blows as Teiichi blocked each strike.

Tanjiro trained by sparring against Teiichi, cycling through Hinokami Kagura while Teiichi exposed his flaws and struck him. After Tanjiro asked to see Teiichi's true strength, Teiichi answered his Dragon Sun Halo: Head Dance with Wind Breathing: Modified, First Form: Wind Slash.

• Tanjiro attacked Teiichi with Hinokami Kagura, but Teiichi easily interrupted his techniques and held him back with superior strength.
• Zenitsu watched the spar and realized how strong both Tanjiro and Teiichi were, noting that Teiichi had not even used a sword form.
• Teiichi shifted to instructional sparring and struck Tanjiro as he repeated the Hinokami Kagura techniques, helping him expose and gradually correct his mistakes.
• After Tanjiro completed repeated rounds and grew exhausted, Teiichi called an end to the training session.
• Tanjiro asked Teiichi to show his true strength, then attacked with Dragon Sun Halo: Head Dance.
• Teiichi drew in oxygen and countered with Wind Breathing: Modified, First Form: Wind Slash.

Teiichi sparred with Tanjiro, stopping his Wind Breathing strike just before it hit, then made Zenitsu and Kanao spar with him as well. Afterward, he told Tanjiro that Hinokami Kagura was Sun Breathing, the original Breathing Style from which the five fundamental styles were derived.

• Tanjiro attacked Teiichi with Hinokami Kagura, but Teiichi countered with Modified First Form: Wind Slash and halted his wooden sword just before Tanjiro's forehead.
• Teiichi called Zenitsu to spar, and Zenitsu protested that he wanted to sit it out.
• Teiichi sparred with Zenitsu and Kanao, going easier on Kanao.
• Tanjiro asked Teiichi about Hinokami Kagura, and Teiichi explained that its true name was Sun Breathing.
• Teiichi told Tanjiro that Sun Breathing was the original style and that Wind, Thunder, Flame, Stone, and Water Breathing derived from it.

Teiichi explained Sun Breathing’s origins and discussed Tanjiro’s offer to teach it to him, but said it did not suit his fighting path. After Kanae and Shinobu Kocho treated a poisoned Demon Slayer, they learned that new members would soon arrive at the Butterfly Mansion for training, with Teiichi taking the lead.

• Teiichi told Tanjiro and Zenitsu that Sun Breathing was too demanding for most people to learn and had been lost after its creator died.
• Tanjiro offered to teach Teiichi Sun Breathing, but Teiichi said he had already studied it and preferred his improved Wind Breathing.
• Teiichi met Kanae and Shinobu Kocho after they treated a Demon Slayer whose movements had been slowed by poison.
• Kanae told Teiichi that the Master had arranged for members to arrive at the Butterfly Mansion over the next few days for training.
• Shinobu agreed to help Teiichi train the newcomers when she was free, while Teiichi took primary responsibility.

Kato Teiichi began leading training for a group of high-ranking Demon Slayer Corps members, many of whom doubted his authority because he was not currently in the Corps. After defeating them all in a brief fight, he started their training with a mountain climb that he hinted would soon become much harder.

• Kato Teiichi introduced himself as the person responsible for planning and overseeing the group’s training, and Yamada and others challenged his right to lead them because he was not a Corps member.
• Seven Corps members objected to training under Teiichi and demanded that Kanae and Shinobu train them instead, so Teiichi offered to summon them if anyone could beat him.
• Teiichi knocked down the challengers, first individually and then as a group, and the Corps members stopped questioning his authority.
• Teiichi set the group’s morning task as climbing the nearby mountain, and Kanon, Kanao, Tanjiro, and the others began the ascent.
• Teiichi watched them start climbing and indicated that the real challenge would begin soon.

Teiichi raced up the mountain using his Wind Field while the Corps members climbed the trail, and he surveyed their progress from the summit. He began the real challenge by attacking them with fierce gusts, and Kanon braced herself against the first one.

• Sawada told Sato that Teiichi had once been the Wind Hashira, and the two investigated a noise in a tree before continuing up the mountain.
• Teiichi passed Tanjiro, Zenitsu, and Inosuke by leaping through the trees, prompting Zenitsu to complain that he was cheating.
• Teiichi reached the summit in a little over four minutes, sensed the climbers' positions, and prepared to begin the real climb challenge.
• Kanon ran toward the summit and estimated she had seven or eight minutes left before a sudden gust knocked her backward.
• Kanon steadied herself against the wind and said she had expected the climb would not be so simple.

Tanjiro, Inosuke, Zenitsu, Kanon, and the other Corps members climbed Teiichi’s mountain under the resistance of his controlled wind. By noon, everyone had completed the assigned climbs and rested silently at the summit.

• Inosuke raced up the mountain after Tanjiro and Zenitsu, and the three encountered Kanao on the trail.
• Teiichi’s fierce wind pushed back the climbers, and Zenitsu wondered whether Teiichi was a demon who had overcome sunlight, but Tanjiro said his nose confirmed Teiichi was human.
• Kanon reached the summit, rested, and told Teiichi she had not known he could use his Wind Field this way before descending to climb again.
• Tanjiro, Inosuke, and Zenitsu reached the summit, and Teiichi told them to rest before making another climb; Zenitsu protested that he was exhausted.
• Teiichi instructed Corps members who reached the summit to direct climbers to descend, rest, and begin again, and Kanon completed another climb.
• Before noon, everyone finished their tasks and lay down to rest at the summit.

Teiichi comforted Kanae with a foot soak while she shared her discovery that Nezuko's blood reacted unusually to wisteria without deteriorating. The discovery led Teiichi to wonder whether Nezuko might also be immune to sunlight.

• Kanae told Teiichi she had been researching and rested in his embrace.
• Teiichi prepared hot water and massaged Kanae's feet as she gradually relaxed.
• Kanae explained that Nezuko's blood reacted with wisteria but did not deteriorate like ordinary demon blood.
• Teiichi considered Nezuko's unusual resistance and asked Kanae whether she might not be afraid of the sun.

Teiichi, Kanae, and Shinobu tested Nezuko’s blood against wisteria and confirmed it did not react like an ordinary demon’s. They began a cautious sunlight trial, which ended as Nezuko’s fingers touched the sun and smoke rose from them.

• Teiichi explained that Nezuko would be exposed to sunlight gradually, while Tanjiro voiced his worry.
• Kanae mixed Nezuko’s blood with wisteria juice, and it remained bright red without deteriorating.
• Kanae mixed ordinary demon blood with wisteria juice, and it smoked and rapidly dissipated.
• Tanjiro carefully guided Nezuko toward the sunlit courtyard and reassured her as she hesitated.
• Nezuko reached one hand into the sunlight, and smoke rose from her fingers.

Nezuko endured the sunlight until her body adapted, allowing her to survive in the sun and speak again. The chapter ended with her calling Tanjiro her big brother as he embraced her in tears.

• Nezuko exposed her arm to sunlight again while Tanjiro watched anxiously and Teiichi urged him to trust her.
• Nezuko's arm repeatedly burned and regenerated until it stopped changing in the sunlight.
• Nezuko leapt into the sunlight and endured the burning until the smoke and pain stopped.
• Nezuko spoke to Tanjiro, telling him she was all right and that it was wonderful.
• Nezuko called Tanjiro her big brother, and he hugged her while crying.

After a day of exhausting training, Zenitsu and Inosuke returned to the Butterfly Mansion and found Nezuko practicing names with Kiyo, Sumi, and Naho. Nezuko welcomed Inosuke home, and Zenitsu angrily accused him of stealing the greeting meant for him.

• Zenitsu complained about the daily training as he walked back with Inosuke and Murata, and Murata explained that Tanjiro had stayed behind because Mr. Kato told him to.
• Zenitsu considered getting injured as a way to escape training, then went with Inosuke to look for Tanjiro at the Butterfly Mansion.
• Nezuko practiced saying the girls’ names and successfully repeated Kiyo and Sumi, while promising Naho she would learn to say her name too.
• Nezuko spotted Inosuke, waved, and said, “Welcome home,” prompting Inosuke to ask her to say his name.
• Zenitsu kicked Inosuke flying and shouted that Inosuke had stolen Nezuko’s welcome home meant for him.

Zenitsu and Inosuke fought over Nezuko until Teiichi knocked them both down and threatened to increase their training. White Feather then told Kagaya Ubuyashiki that Nezuko had overcome sunlight, leaving him stunned as Amane entered the room.

• Zenitsu excitedly planned a day out with Nezuko, but Inosuke kicked him and tried to recruit her as an underling, starting a fight between them.
• Kiyo, Sumi, and Naho worried about the fight and tried to decide whether to get help, but Teiichi knocked Zenitsu and Inosuke down before they could act.
• Teiichi praised the girls and told Zenitsu and Inosuke that he would increase their training, prompting the two to wail in protest.
• White Feather flew to Kagaya Ubuyashiki and reported that Nezuko could now live in sunlight like a human.
• Kagaya Ubuyashiki dropped his teacup in shock, and Amane entered to ask what had happened.

Kagaya Ubuyashiki and Amane Ubuyashiki learned from Kanae Kocho’s letter that Nezuko had overcome sunlight, giving the Demon Slayer Corps leverage over Muzan Kibutsuji. Kagaya decided to keep the discovery from Muzan until they understood its cause and said they would help the researchers pick up the pace.

• White Feather delivered Kanae Kocho’s report that Nezuko’s blood resisted wisteria and that she had recovered from sunlight burns until she could live normally beneath the sun.
• Amane Ubuyashiki read the letter aloud, and she and Kagaya Ubuyashiki absorbed the news that Nezuko had overcome sunlight.
• Kagaya Ubuyashiki explained that Muzan Kibutsuji would have to seek Nezuko, since the Demon Slayer Corps would kill her before Teiichi passed away if Muzan waited.
• Kagaya Ubuyashiki said they should not reveal the news to Muzan until they discovered why Nezuko did not fear the sun.
• Kagaya Ubuyashiki proposed finding a way to help Kanae Kocho and the others accelerate their research.

A Kasugai Crow representing Kagaya Ubuyashiki found Tamayo’s hidden home and explained how the Ubuyashiki Family had tracked her. It revealed that Nezuko had conquered sunlight, but Yushiro burst in and prepared to deal with the crow.

• A Kasugai Crow found Tamayo’s concealed house and entered her study.
• The crow introduced itself as Kagaya Ubuyashiki’s personal messenger and said the Ubuyashiki Family had known about Tamayo for a long time.
• The crow explained that the family had located Tamayo through records, public information, and property transactions, and praised Yushiro’s Blood Demon Art.
• Tamayo asked why the crow had come, and it told her that Nezuko had conquered sunlight.
• Yushiro rushed into the study, confirmed Tamayo was safe, and said he would deal with the crow before they moved.

The Kasugai Crow told Tamayo that Nezuko had conquered sunlight and asked her to help research the reason at the Demon Slayer Corps. He urged her to join forces against Muzan Kibutsuji by revealing that one former Corps member had survived an attack by Upper Ranks One through Six and killed Upper Ranks Four and Five.

• Yushiro started to intervene, but Tamayo reassured him and sent him outside so she could speak privately with the Kasugai Crow.
• The Kasugai Crow told Tamayo that Nezuko had conquered sunlight and asked her to assist the Corps' researchers at Butterfly Mansion.
• Tamayo hesitated to enter the Demon Slayer Corps, and the Kasugai Crow explained that it accepted demons like her and Nezuko who did not eat people.
• The Kasugai Crow said the Corps had information on all the Upper Ranks and that Upper Ranks Four and Five had been eliminated by a former Corps member.
• Tamayo questioned whether that person could help defeat Muzan, and the Kasugai Crow revealed that he had faced Upper Ranks One through Six together inside the Infinity Castle and escaped.

Tamayo learned that Kato Teiichi might be the only person capable of defeating an Upper Rank, then arrived at the Butterfly Mansion to meet him. As Teiichi, Kanae, and Shinobu Kocho waited beneath the stars, he predicted that fate would bring about Muzan’s defeat and that their work would help make it happen.

• Tamayo asked the Kasugai Crow who could defeat an Upper Rank, and it named Kato Teiichi.
• Teiichi, Kanae, and Shinobu Kocho watched the stars together and discussed Tamayo and Nezuko, both demons who did not need to eat people.
• Teiichi said fate had brought recent events together and told Shinobu Kocho that Nezuko could help her develop medicine to weaken demons or turn them human.
• Teiichi sensed Tamayo’s arrival, and the three went to greet her at the Butterfly Mansion.
• Tamayo stepped down from the carriage, looked at Teiichi, and asked if he was Lord Teiichi.

Tamayo arrived at the Butterfly Mansion and explained that she wanted to help kill Muzan Kibutsuji, who had turned her into a demon and caused her to kill her family. She and the Kocho sisters began discussing research, while Teiichi went to fetch Tanjiro and Nezuko and overheard the exhausted Zenitsu and Inosuke being compared with Tanjiro and Murata.

• Tamayo asked Teiichi if he was Lord Teiichi, then bowed and said she was counting on him in the battle against Muzan Kibutsuji.
• Tamayo told Kanae and Shinobu Kocho that Muzan had turned her into a demon, and that she had killed her husband and children after losing control.
• Kanae introduced herself and Shinobu as the Flower Hashira and Insect Hashira, and Tamayo introduced Yushiro to them at the Butterfly Mansion.
• Tamayo agreed to conduct research during the day, and Shinobu began explaining their work with Nezuko's blood.
• Teiichi left to fetch Tanjiro and Nezuko, then heard Zenitsu complain that Tanjiro and Murata had more stamina than he and Inosuke.
• Teiichi knocked on Tanjiro's room door after hearing the group talk about their training exhaustion.

Teiichi brought Tanjiro and Nezuko to meet Tamayo and Yushiro at the Butterfly Mansion, where Tamayo realized Nezuko had conquered sunlight. Meanwhile, Tengen Uzui, unable to locate the demon in Yoshiwara, asked his three wives to investigate the district’s establishments.

• Teiichi fetched Tanjiro and Nezuko and led them to the tea room to meet Tamayo and Yushiro.
• Tanjiro greeted Tamayo and Yushiro, and Tamayo noticed that Nezuko had conquered sunlight.
• Tengen Uzui concluded that the demon was active around Ogimoto House, Kyogoku House, and Toki House but had concealed its presence from him.
• Tengen Uzui asked Hinatsuru, Makio, and Suma to search the three establishments and warned them to put their safety first.

Tengen Uzui asked his wives to help with a mission, while Teiichi continued training the Corps members at the Butterfly Mansion. During a crowded sparring session, Teiichi sent several trainees flying, and Tanjiro ended up caught by Inosuke.

• Tengen Uzui asked Hinatsuru, Makio, and Suma to help him and reminded them to stay safe and send daily letters with the muscle mice.
• Kanae and Shinobu Kocho continued researching with Tamayo while Teiichi trained Corps members at the Butterfly Mansion.
• Teiichi knocked back Corps members who charged him, including Inosuke after his Beast Breathing attack.
• Kanon attacked Teiichi with Flower Breathing forms, but he broke through her defenses and sent her flying.
• Zenitsu charged Teiichi with Thunder Breathing, but Teiichi struck him and sent him flying.
• Inosuke caught Tanjiro as he flew toward him, and Tanjiro thanked him.

Teiichi ended the Corps members’ exhausting training, then stayed behind to train with Kanon. At the Butterfly Mansion, Tengen Uzui tried to recruit girls to help find his missing wives, but Aoi Kanzaki refused and blocked him from speaking with Kanae and Shinobu.

• Teiichi called an end to training after only Kanon, Kanao, Tanjiro, Zenitsu, and Inosuke remained standing.
• Zenitsu celebrated surviving training while Inosuke demanded food, and the Corps members headed back to the Butterfly Mansion.
• Teiichi and Kanon stayed behind to train together after the others left.
• Tengen Uzui asked Aoi Kanzaki to let him take girls as bait to help find his wives, but Aoi angrily refused.
• Tengen asked where Kanae and Shinobu were, and Aoi said they were doing research but would not call them for him.