Zenitsu Finally Gets His Hero Moment
For most of the episode, Zenitsu Agatsuma (voiced by Hiro Shimono) is his usual mess. Fresh off his sleep-fighting awakening with Thunderclap and Flash, the first form of Thunder Breathing, he spends Episode 13 wandering the shifting rooms of the drum demon's mansion. The boy Shoichi even has to ask whether they've been walking in circles. According to the reaction roundup from Japanese anime news site Anime Anime, viewers mostly laughed at him: "Zenitsu's turn around the drum mansion cracks me up every time."
Then the final scene lands. Tanjiro (Natsuki Hanae) steps outside, catches the smell of blood, and finds Zenitsu beaten half to death. A boar-headed swordsman, Inosuke Hashibira (Yoshitsugu Matsuoka), stands over him, yelling at him to draw his sword and fight. Zenitsu has thrown his body over the wooden box Tanjiro carries everywhere, the one holding his sister Nezuko (Akari Kito), who was turned into a demon. "Tanjiro, I... protected it," he says. "Because you said this was more important than life itself."
What makes the scene sting is a detail the episode confirms: Zenitsu knew from the start that Tanjiro was traveling with a demon. He guarded the box anyway, on nothing but his friend's word. Viewers quoted in the roundup called him "the man who delivers when it counts" and admitted "Zenitsu's scene gets my tear ducts going every single time." One comment summed up the turnaround: "This is the episode that blew away my initial dislike of him. Who is this good kid?"
Others pointed out how strange the trio's origin looks in hindsight. Zenitsu and Inosuke meet through a beatdown over a box, and nobody watching in 2019 would have guessed these three become the heart of the series.
Kyogai's Farewell Hit Just as Hard
Inside the mansion, Tanjiro spends the episode fighting Kyogai, the demon whose tsuzumi, a traditional Japanese hand drum, spins the room with every beat. Still nursing broken bones from his last fight, Tanjiro declares that he won't break and won't give up. The words dredge up Kyogai's human past, when someone dismissed his writing as boring and "garbage in every way."
Tanjiro knows none of this. But he refuses to step on the manuscript pages scattered across the spinning room, and dodging them teaches him how to move and breathe without aggravating his injuries. After Tanjiro takes his head, Kyogai asks one last question: "Was my Blood Demon Art... incredible?" He fades away in tears, his pages untouched.
Japanese fans came away sympathetic. Comments included "Kyogai's episode always gets me," "he just wanted to be recognized while he was still human," and "a demon you can't bring yourself to hate." The next-episode preview's Taisho-era secret segment adds one more layer: Kyogai loved Satomi Hakkenden, the classic Edo-period adventure epic, and wrote his own fiction in that vein.
Junichi Suwabe Looks Back on Kyogai
The official Demon Slayer account has been publishing weekly cast comments to mark the rerun, and Episode 13's comes from Junichi Suwabe, known to international fans as Sukuna in Jujutsu Kaisen, Keigo Atobe in The Prince of Tennis, and Shota Aizawa in My Hero Academia.
Suwabe said that after the episode originally aired, a traditional Japanese instrument player he later worked with on stage thanked him for putting the tsuzumi in the spotlight. He joked that he didn't create the character, but said the moment made him feel the reach of the series firsthand.
Looking Ahead
The full-series rerun started on April 5, 2026, one day short of seven years after the show's April 6, 2019 premiere. It airs Sundays from 9:30 to 10:00 a.m. on Fuji TV and other stations, with broadcasters outside the Kanto region to be listed on the official site.
The franchise's theatrical side is mid-story: Demon Slayer: Infinity Castle Chapter 1, "Akaza Returns," the first film in a trilogy, opened in Japanese theaters on July 18, 2025. For international viewers who want to revisit the Tsuzumi Mansion arc, the TV series streams on Crunchyroll and Netflix. Koyoharu Gotouge's original manga is complete at 23 volumes, has over 220 million copies in circulation, and is available in English from Viz Media.