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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsSpoilers: The first episode of Demon Slayer: Kimetsu no Yaiba – Hashira Training Arc, commonly listed as Season 4, Episode 1, opens with Sanemi Shinazugawa and Obanai Iguro investigating disappearances before turning to Tanjiro’s recovery and the Hashira’s plan to train the Corps for its fight against Muzan. The episode is titled “To Defeat Muzan Kibutsuji.”
What happens in Demon Slayer Season 4, Episode 1?
The episode begins with Wind Hashira Sanemi Shinazugawa and Serpent Hashira Obanai Iguro responding to reports of people disappearing from a village. They follow a demon carrying a woman to a remote, abandoned castle and enter the structure with other Demon Slayer Corps members. The mission provides the opening action and introduces a setting that evokes the danger of the Infinity Castle.
![Demon Slayer: Kimetsu no Yaiba - Part 1 [Blu-ray]](https://m.media-amazon.com/images/I/41Wyp8YAh2L._SL160_.jpg)
The story then shifts to Tanjiro, who is still recovering from injuries sustained in the Swordsmith Village battle. At the Butterfly Mansion, he is being treated while events elsewhere begin to set the Corps’ next effort in motion.
What do the Hashira discuss at the Ubuyashiki Mansion?
The Hashira gather at the Ubuyashiki Mansion. Muichiro Tokito explains how the Demon Slayer marks manifested, giving the group a basis for considering what the marks mean as they prepare for the coming fight.
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Kanao Tsuyuri also returns to the Butterfly Mansion. A crow brings her an invitation to work with Shinobu and the Corps against Muzan, drawing her into the coordinated response to the threat.
Why does Hashira Training begin?
After the meeting, the Hashira decide to strengthen the wider Demon Slayer Corps from the bottom up. Their training program begins with the aim of preparing the swordsmen for a confrontation with Muzan Kibutsuji. The urgency follows the Swordsmith Village events: two Upper Rank demons were defeated, and Nezuko’s immunity to sunlight has made her central to Muzan’s ambitions.
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- Tanjiro Kamado, joined with Inosuke Hashibira, a boy raised by boars who wears a boar's head, and Zenitsu Agatsuma, a scared boy who reveals his true power when he sleeps, board the Infinity Train on a new mission with the Fire Pillar, Kyojuro Rengoku, to defeat a demon who has been tormenting the people and killing the demon slayers who oppose it!
Episode details and manga context
- Official English title: “To Defeat Muzan Kibutsuji.”
- Release date: Crunchyroll lists the episode as released on May 12, 2024.
- Runtime: ComingSoon reports an approximate runtime of 49 minutes.
- Content advisory: Crunchyroll’s listing flags violence and suicide and rates the episode 16+.
ORICON reports that the Hashira Training Arc adapts material from manga volumes 15–16. Those volumes are a useful next step for readers who want the source manga, though the available reporting does not establish a precise chapter-by-chapter match for this episode.
Quick Recap
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Sources
- Demon Slayer: Kimetsu no Yaiba Anime Official USA Website — episode title and synopsis.
- Crunchyroll — episode listing, release date, advisory and recap information.
- ORICON — manga-volume context for the arc.
- ComingSoon — reported approximate runtime.
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