Demon Slayer: Kimetsu no Yaiba – Season 1 introduces Tanjiro Kamado, a young man whose life is upended during the Taisho Era in Japan. After returning from a nearby village to find his family decimated by a demon, Tanjiro discovers that his sister, Nezuko Kamado, has survived but has been transformed into a demon. The season focuses on his entry into the Demon Slayer Corps and his quest to find a biological cure for Nezuko while hunting the progenitor of all demons.
The narrative follows Tanjiro’s two-year training period under Sakonji Urokodaki, a former Water Hashira. During this time, he masters the art of Water Breathing and Total Concentration Breathing, which allows him to enhance his physical strength and speed. The story establishes the central conflict between the Demon Slayer Corps, which protects humanity, and the demons, who serve the ancient and malevolent Muzan Kibutsuji.
Demon Slayer: Kimetsu no Yaiba – Season 1 Plot Summary
The plot begins with the Final Selection, a survival trial on Mount Fujikasane where candidates must survive for seven days in a demon-infested forest. Tanjiro successfully defeats the Hand Demon, a creature that had consumed many previous students of Urokodaki. Upon passing, he receives his Nichirin Sword and is assigned his first official missions, which lead him to investigate mysterious disappearances in urban settings like Asakusa. It is here that he first encounters Muzan Kibutsuji, discovering that the antagonist maintains a human identity.
As the season progresses, the narrative expands to include the Mount Natagumo arc, where Tanjiro and his new companions face the Spider Family. This family is led by Rui, who holds the rank of Lower Moon Five within the Twelve Kizuki. The battle is a turning point for Tanjiro, as he manifests the Hinokami Kagura, a fire-based breathing style inherited from his father. This technique, combined with Nezuko’s Blood Demon Art, allows them to challenge one of the most powerful demons encountered to date.
The season concludes with the Rehabilitation Training arc at the Butterfly Mansion. Following the intense combat on Mount Natagumo, Tanjiro, Zenitsu Agatsuma, and Inosuke Hashibira undergo physical therapy and advanced training. They work to master Total Concentration: Constant, maintaining their breathing style 24 hours a day. This arc serves as the final preparation before the group is deployed to investigate a series of disappearances on the Mugen Train, setting the stage for the next chronological entry in the series.
Demon Slayer: Kimetsu no Yaiba – Season 1 Cast, Characters, and Arc
The character development in Demon Slayer: Kimetsu no Yaiba – Season 1 is centered on the dynamic between Tanjiro and Nezuko. Tanjiro is defined by his heightened sense of smell and his refusal to lose his empathy, even when facing lethal threats. Nezuko, despite being a demon, shows remarkable restraint and a protective instinct toward humans, which challenges the black-and-white morality held by many high-ranking Demon Slayers. This arc establishes their bond as the core emotional anchor of the entire franchise.
The introduction of Zenitsu Agatsuma and Inosuke Hashibira provides a functional expansion to the cast. Zenitsu utilizes Thunder Breathing, but his true power only manifests when he is unconscious due to extreme fear. Inosuke, a self-taught warrior using Beast Breathing, represents a more primal approach to combat. Together, they form a specialized unit that balances Tanjiro’s methodical nature. The season also introduces the Hashira, the elite pillars of the corps, including Giyu Tomioka and Shinobu Kocho, who represent the pinnacle of swordsmanship.
- Tanjiro Kamado: The protagonist who uses Water Breathing techniques.
- Nezuko Kamado: A demon who fights alongside her brother using physical strength and flames.
- Zenitsu Agatsuma: A swordsman with a specialized mastery of the Thunder Breathing First Form.
- Inosuke Hashibira: A feral warrior who wears a boar mask and utilizes dual serrated blades.
How Demon Slayer: Kimetsu no Yaiba – Season 1 Fits the Series
As the inaugural season, this 26-episode run serves as the essential foundation for the Kimetsu no Yaiba franchise. It meticulously details the mechanics of the world, specifically how Breathing Styles work and the limitations of demon regeneration. By focusing on the Unwavering Resolve arc, the season establishes the stakes of the conflict and the immense power gap between the lower-tier slayers and the Twelve Kizuki. It transitions the story from a personal revenge tale into a large-scale war for the future of humanity.
The season also introduces the overarching mystery of the Hinokami Kagura and its connection to the Sun Breathing style. This plot thread remains a central focus in subsequent seasons and films. By ending the season at the Butterfly Mansion, the show ensures a seamless transition into the Mugen Train film. The internal logic of the series, including the Hashira hierarchy and the specific weaknesses of demons, is fully codified by the final episode of this season.
Where to Watch Demon Slayer: Kimetsu no Yaiba – Season 1
Viewers can access Demon Slayer: Kimetsu no Yaiba – Season 1 on several major streaming platforms. The series is currently hosted on Netflix and Hulu for subscribers in multiple regions. Additionally, Crunchyroll provides both subtitled and dubbed versions of the 26 episodes. These platforms offer high-definition versions of the show, which is necessary to appreciate the detailed animation provided by Ufotable.
Digital purchase options are also available through Amazon Video, Apple TV, and Google Play Movies. These versions allow for permanent access to the season. The availability on Crunchyroll also includes access through their Amazon Channel for Prime members. It is recommended to check local listings, as licensing agreements for Demon Slayer can vary by country and region.
Why You Should Watch Demon Slayer: Kimetsu no Yaiba – Season 1
The primary reason to watch this season is the production value provided by the animation studio Ufotable. They utilize a distinct visual style that integrates Ukiyo-e traditional Japanese art into the Water Breathing combat effects. This creates a high-contrast aesthetic that is unique in the modern anime landscape. The fluidity of the action scenes, particularly during the Mount Natagumo arc, set a new technical standard for televised animation in 2019.
Furthermore, the historical setting of the Taisho Era provides a grounded atmosphere that contrasts well with the supernatural elements. The transition from rural mountains to the industrial urban sprawl of Tokyo highlights the changing world of 1910s Japan. The score by Yuki Kajiura and Go Shiina enhances this atmosphere, using traditional Japanese instruments to underscore the somber and high-intensity moments alike. The series manages to balance brutal action with a character-driven narrative about familial loyalty and resilience.
Is Demon Slayer: Kimetsu no Yaiba – Season 1 Safe to Watch? (Age Rating Guide)
Official age rating not available.
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For verified credits, release details, or official resources, visit IMDb and Official Site.
| Director | Not available |
|---|---|
| Main Cast | Natsuki Hanae, Akari Kito, Hiro Shimono, Yoshitsugu Matsuoka |
| Release Year | 2019 |
| Genre | Action & Adventure, Animation, Sci-Fi & Fantasy |
Frequently Asked Questions
When was Demon Slayer: Kimetsu no Yaiba – Season 1 released?
Demon Slayer: Kimetsu no Yaiba – Season 1 was released on April 6, 2019.
What is Demon Slayer: Kimetsu no Yaiba – Season 1 about?
The plot begins with the Final Selection, a survival trial on Mount Fujikasane where candidates must survive for seven days in a demon-infested forest. Tanjiro successfully defeats the Hand Demon, a creature that had consumed many previous students of Urokodaki.
Where can I watch Demon Slayer: Kimetsu no Yaiba – Season 1?
Demon Slayer: Kimetsu no Yaiba – Season 1 is available on Amazon Video, Apple TV, and Crunchyroll.
Episode guide
Cruelty
It is the Taisho Period (i.e. 1912-1926). Tanjiro Kamado is living a modest but blissful life in the mountains with his family. One day, when he returns from selling charcoal in town, he finds the remains of his slaughtered family in pools of blood after a demon attack. Tanjiro rushes down the snowy mountain with the sole survivor, his sister Nezuko, on his back. But on the way, Nezuko suddenly snarls, turning on Tanjiro.
Trainer Sakonji Urokodaki
At Giyu Tomioka's urging, Tanjiro heads for Mt. Sagiri with his sister Nezuko who's been turned into a demon. During the night, Tanjiro catches the smell of blood from inside a temple. He enters, thinking that someone might be hurt, only to come upon a man-eating demon. When the demon attacks, Tanjiro manages to fight back with his hatchet, but the demon's strength is overwhelming. Just as the demon is about to finish him off, Tanjiro is saved by none other than.
Sabito and Makomo
The Demon Slayer Corps... An organization that's been hunting down demons since ancient times. Sakonji Urokodaki starts training Tanjiro for Final Selection, the test for joining the unit. Navigating a mountain riddled with booby traps, dry sword swings, waterfall immersion and breathing techniques... A year later, Urokodaki informs Tanjiro that he has nothing more to teach him, and gives him one last hurdle to overcome in front of a giant boulder.
Final Selection
To pass Final Selection, one must survive for seven days on Mt. Fujikasane where demons captured by the Demon Slayers have been imprisoned. So begins the battle for survival between the young swordsmen and the demons. Armed with the breathing techniques and stances he'd learned from Sakonji Urokodaki, Tanjiro slashes demon after demon. His two years of training have not gone to waste. But just then, a morphed demon appears out of nowhere.
My Own Steel
When day breaks, there are only four swordsmen left standing after the seven-day battle. The guides who greet Tanjiro and the other survivors explain the Demon Slayer Corps system. All four are issued uniforms and Kasugai Crows as messengers, after which they must select the ore for their own Nichirin swords. After gazing hard at each lump of ore, and using his keen sense of smell, the one Tanjiro chooses is...
Swordsman Accompanying a Demon
Tanjiro is now clad in the uniform of the Demon Slayer Corps. His Nichirin Sword on his hip, and Nezuko, now awake, in a special box made by Urokodaki on his back, he heads out for his first assignment. A town to the northwest where girls have been vanishing nightly. There, Tanjiro meets Kazumi, haggard with worry after his girlfriend's been abducted. Though he does catch the scent of a demon nearby, there's just no demon in sight. Tanjiro is sure that a demon is behind this sinister incident...
Muzan Kibutsuji
Now split into three, the demons have driven Tanjiro into a corner. It is then that Nezuko attacks. Now that she’s become a demon herself, she’s no longer so weak that she needs protection. His mind made up, Tanjiro follows one of the demons into the swamp now spreading across the ground. Waiting for him there is...
The Smell of Enchanting Blood
The next mission is in Asakusa, Tokyo. Tanjiro is taken aback by the opulent Taisho Era cityscape, but soon picks up the demon’s scent there. His pursuit of the scent leads him to Muzan Kibutsuji. Tanjiro attempts to strike him down. But Kibutsuji transforms a passerby into demon, triggering a commotion. As Tanjiro desperately tries to get things under control, someone appears before him...
Temari Demon and Arrow Demon
It was two demons named Tamayo and Yushiro who came to Tanjiro’s rescue. Using the “Eyeblind” spell, Tamayo guides Tanjiro and Nezuko to her house. There, through his conversation with Tamayo, Tanjiro learns that there is a way to return demons to human form. Just then, two demons in pursuit of Tanjiro locate the house and unleash a furious assault...
Together Forever
Tanjiro’s crisis continues. He uses multiple forms of the Water Breathing technique to hold out against Yahaba’s final Blood Demon Art, the "Kouketsu Arrow." Meanwhile, Nezuko and Susamaru are still battling it out. Worried about the outcome, Tamayo unleashes her own Blood Demon Art.
Tsuzumi Mansion
Tanjiro's next destination, according to his Kasugai Crow, is to the south-southeast. On the way, Tanjiro runs into his fellow Final Selection survivor, the swordsman Zenitsu Agatsuma. Tanjiro has a hard time dealing with Zenitsu's passive attitude as they head deep into the mountains. They encounter two children whose older brother was taken away right in front of their house. There, Zenitsu hears the sound of a tsuzumi ringing out from somewhere.
The Boar Bares Its Fangs, Zenitsu Sleeps
Inside the house, where the rooms spin each time the tsuzumi is played, Tanjiro gets separated from Zenitsu Agatsuma. Without Tanjiro by his side, Zenitsu is overcome by fear and despair as he takes Shoichi through the house. Meanwhile, Tanjiro meets the master of the house, the tsuzumi-playing demon, and an odd-looking man wearing a boar’s head mask.
Something More Important Than Life
Every time Kyogai, the master of house, plays his tsuzumi, the room spins and Tanjiro struggles. Debilitated by the fractured bones he sustained in his previous battle, Tanjiro tries to fire himself up as he desperately fights on, but he is overwhelmed by Kyogai's Blood Demon Art. Will he find a way to slice off Kyogai's head?
The House With the Wisteria Family Crest
After a desperate fight to the death, Tanjiro prevails over Kyogai. He exits the house to find Zenitsu who had escaped earlier. But it is then that he sees the strange circumstances before him... The battered Zenitsu holding the box containing Nezuko in his arms while the man in the boar's head mask stands in the way with two Nichirin Swords drawn.
Mount Natagumo
Their next destination is to the north-northwest. Tanjiro and Nezuko head towards Mount Natagumo with Zenitsu and Inosuke. This mountain is covered with spider webs and is swarming with innumerable spiders. Leaving the cowering Zenitsu behind, Tanjiro and Inosuke head up the mountain where they run into fellow Demon Slayers entangled in spider webs.
Letting Someone Else Go First
Tanjiro and Inosuke battle the Demon Slayers trapped by spider webs. After slashing the threads and destroying the webs, they head deeper into the mountain. The farther they advance through the forest, the thicker the threads become, and those under their control start moving in ways impossible for a human being. Stopping the Demon Slayers without hurting them isn't going to be easy, but then Tanjiro makes a certain move...
You Must Master a Single Thing
One of the Twelve Kizuki, a direct subordinate of Muzan Kibutsuji, is here somewhere. When Tanjiro slays the Mother Spider Demon of Mt. Natagumo, he learns that a demon who might hold the key to turning Nezuko back into a human is somewhere in this very forest. With the battered Inosuke in tow, he heads deeper into the forest. Meanwhile, Zenitsu trudges forlornly through the woods only to encounter a spider with a human face.
A Forged Bond
Tanjiro and Inosuke face off against the Father Spider Demon of Mt. Natagumo. Tanjiro unleashes an attack, only to get hurled away by the demon's overwhelming power. Landing near a river, he comes upon the young demon Rui torturing the Sister Spider Demon. When Rui calls their bond of terror and hatred "a family’s bond," Tanjiro is enraged. So begins the battle between Rui and Tanjiro.
Hinokami
Swordsmen in the Demon Slayer Corps known as Hashiras have arrived on Mt. Natagumo. Giyu Tomioka, the Water Hashira, slays the Father Spider Demon with a single strike. Inosuke, thrilled to see such a display of swordsmanship by someone in a totally different league from himself, challenges Giyu to a duel. Meanwhile, Zenitsu lies near death as the poison circulates throughout his body. Just then, the Insect Hashira, Shinobu Kocho appears before him.
Pretend Family
When Rui assaults him with his Blood Demon Art, Tanjiro braces himself for certain death. As his life flashes before his eyes, he suddenly remembers his father's dance, the kagura, and unleashes a new, non-Water Breathing attack. Hinokami Kagura Dance. Knowing that he’ll be receiving a simultaneous blow from the demon, he uses his new move to slice off Rui’s head. As Tanjiro crawls towards Nezuko, who lies on the ground, riddled with wounds, someone appears before him.
Against Corps Rules
Seeing Tanjiro try to protect Nezuko even as he collapses triggers memories of Rui’s own past. Once a sickly boy, he became a demon after meeting Muzan Kibutsuji who gave him a share of his blood. But after he turns into a demon, his own parents try to kill him. Ever since then, he has been searching for a family. Seeking a bond that he can never hope to acquire...
Master of the Mansion
After the battle is over, Tanjiro and Nezuko are taken to the Demon Slayer Corps headquarters. This is where the Hashira Meeting between the Corps leader, Ubuyashiki, and the Hashiras, the most powerful swordsmen in the Corps, is to be held. The Hashiras censure Tanjiro for violating the Demon Slayer Corps by protecting a demon. And then, the Wind Hashira, Sanemi Shinazugawa, raises his sword against Nezuko...
Hashira Meeting
Ubuyashiki, the leader of the Demon Slayer Corps, finally appears before Tanjiro. He tells him that he will allow Tanjiro and Nezuko to join the Corps. But the Hashiras are unable to accept this decision right away. The Wind Hashira, Sanemi Shinazugawa, slashes his own arm and taunts Nezuko with his blood, trying to get her to show her true colors as a demon.
Rehabilitation Training
The injured Tanjiro, Zenitsu and Inosuke are sent to the home of the Insect Hashira, Shinobu Kocho, for treatment. Two weeks later, Tanjiro and Inosuke start rehabilitation training. But the drills are brutal, and they find themselves broken in spirit. Unaware of the grueling regimen, Zenitsu joins them late and is visibly enthusiastic in front of girls, but...
Tsuguko, Kanao Tsuyuri
Tanjiro, who's undergoing rehabilitation training at the Butterfly Mansion, works hard to keep up his Total Concentration Breathing techniques all day long. Though at first, he's helpless against Kanao, a swordswoman in his class who's training him, he slowly but surely begins to make some headway. Seeing Tanjiro devote himself to training every single day, Zenitsu and Inosuke resume training as well, but...
New Mission
As Tanjiro and the others are devoted to their rehabilitation training, the absolute master of the demons, Muzan Kibutsuji, gathers the Lower Ranks of the Twelve Kizuki. The demons, too, are preparing to make their next move. As training draws to a close, Tanjiro has improved to the point where he can fight on equal terms with Kanao. Just then, he receives word of a new mission from his Kasugai Crow.
Videos: Trailers, Teasers, Featurettes
Cast
Natsuki Hanae
Tanjiro Kamado (voice)
Akari Kito
Nezuko Kamado (voice)
Hiro Shimono
Zenitsu Agatsuma (voice)
Yoshitsugu Matsuoka
Inosuke Hashibira (voice)
