Introduction Arc Guide
Prologue
Complete Introduction Arc guide — Yuji eats Sukuna's finger, joins Jujutsu High, and faces execution.
Overview of the Introduction Arc
The Introduction Arc, also known as the Prologue Arc, is the opening storyline of Jujutsu Kaisen spanning the first 18 chapters of the manga and the first 8 episodes of the anime. It establishes the fundamental premise of the series: a world where negative human emotions manifest as Curses, and the sorcerers who fight them walk a razor's edge between heroism and sacrifice. The arc introduces Yuji Itadori, an ordinary high school student with extraordinary physical abilities, whose life changes forever when he becomes the vessel of Ryomen Sukuna, the King of Curses.
The arc serves as both a character introduction and a thematic foundation. It establishes the rules of cursed energy, the hierarchy of jujutsu society, and the central conflict that drives the entire series — Yuji's race against time to collect all 20 of Sukuna's fingers before facing execution. The stakes are established immediately: this is not a story about becoming the strongest or achieving a grand ambition. It is a story about a boy who died to save someone and now must die again to protect everyone. For a detailed timeline of the series, visit the Jujutsu Kaisen Fandom Wiki.
What sets the Introduction Arc apart from typical shonen openings is its refusal to romanticize the protagonist's situation. Yuji does not gain incredible new powers to pursue a dream. He gains powers because he made a split-second decision to save his friends, and the consequences are a death sentence. The arc masterfully balances lighthearted school comedy with genuine horror, establishing the tonal flexibility that defines Jujutsu Kaisen.
Itadori's Awakening & The Finger Incident
The series opens with Yuji Itadori, a high school student who possesses superhuman strength and speed, living a relatively normal life in Sendai. He is a member of the Occult Research Club alongside his friends Sasaki and Iguchi, a club that exists mostly in name until they stumble upon a sealed cursed object in their school — a decomposing finger wrapped in cursed cloth. Unaware of its true nature, they unseal it, attracting Curses to the school.
Megumi Fushiguro, a first-year student from Tokyo Jujutsu High, arrives to exorcise the Curses and retrieve the finger. However, Megumi is overwhelmed by a high-grade Curse attracted by the finger's malevolent energy. In the critical moment, Yuji watches his friends being attacked and makes the decision that defines his entire life: he swallows the cursed finger. The moment Sukuna's power surges through him is visceral and terrifying — Yuji's body transforms, tattoos spread across his skin, and the King of Curses briefly manifests before Yuji regains control.
This event, known as the Finger Incident, establishes the core dynamic of the series. Yuji is now a vessel for the most dangerous curse in history. He can access Sukuna's immense cursed energy, but at the cost of sharing his body with a being of pure malice who will seize any opportunity to take permanent control. More information about this pivotal event can be found on the Introduction Arc page.
Jujutsu High & The Formation of Team Yuji
Following the Finger Incident, Yuji is brought to Tokyo Jujutsu High by Megumi and introduced to Satoru Gojo, the strongest sorcerer alive. Gojo becomes Yuji's sponsor and mentor, recognizing his potential and arguing against the immediate execution demanded by the jujutsu elders. Under Gojo's protection, Yuji enrolls as a first-year student, beginning his formal training in jujutsu sorcery.
At Jujutsu High, Yuji meets Nobara Kugisaki, a fierce and self-confident sorcerer from the countryside who wields a unique hammer-and-nail cursed technique. Despite a rocky first meeting, Yuji and Nobara develop a competitive camaraderie built on mutual respect and shared determination. Together with the more reserved and strategic Megumi, the trio forms the core of the series' protagonist group under the guidance of their teacher Satoru Gojo.
The school itself is an unconventional institution. Unlike normal schools, Jujutsu High operates as a front for training sorcerers to combat Curses. The curriculum includes practical combat training, cursed energy manipulation, and field missions against real Curses. The school's secluded location and minimal student body reflect the niche and dangerous nature of jujutsu society. Students are expected to risk their lives from day one, with missions that escalate rapidly in difficulty.
The arc also introduces Kiyotaka Ijichi, a jujutsu assistant who coordinates missions, and Masamichi Yaga, the principal of Tokyo Jujutsu High who creates the Panda puppet. These supporting characters flesh out the jujutsu world and establish the institutional framework within which the main characters operate. The formation of Yuji's team is deliberately parallel to traditional shonen group structures, but with a darker undercurrent — this team is formed not for adventure, but for survival against an overwhelming threat.
First Missions & Early Battles
Team Yuji's first missions establish the operational reality of jujutsu sorcery. Their initial assignment involves exorcising a Curse that has taken root in a local hospital. This mission showcases the trio's complementary fighting styles: Megumi's strategic use of his Ten Shadows Technique summons shikigami to control the battlefield, Nobara's Resonance Technique allows her to strike Curses at range through effigy dolls, and Yuji relies on his raw physical strength amplified by cursed energy.
The arc's major battle sequence takes place at a juvenile detention center where a Special Grade Curse has established a territory. Yuji and his team are dispatched to investigate the disappearance of investigators sent to the location. Inside, they encounter a Cursed Spirit born from the accumulated negative emotions of imprisoned youth — a creature that creates a barrier to trap its victims and feeds on their fear.
This battle serves as the arc's climax and demonstrates the genuine danger of jujutsu work. Yuji is forced to push beyond his limits, and in a moment of crisis, he makes a conscious choice to allow Sukuna to take control — a decision with devastating consequences. Sukuna's brief manifestation destroys the Curse effortlessly but also reveals the terrifying truth of what Yuji carries inside him. The battle also introduces the concept of domain expansion, as the Curse's innate domain foreshadows the more sophisticated domain techniques that become central to later arcs.
Sukuna's Manifestation & The Execution Sentence
During the juvenile detention center battle, Yuji makes the calculated decision to allow Sukuna to take control of his body, believing it is the only way to defeat the Special Grade Curse. The moment Sukuna emerges, the series delivers one of its most memorable sequences — Sukuna manifests using one of Yuji's hands to cover his face, peeling back the skin to reveal a mouth where there should not be one. Sukuna toys with the Curse before destroying it with a single attack, demonstrating the vast gulf between his power and ordinary sorcery.
However, Sukuna has no intention of returning control to Yuji. He begins rampaging through the detention center, intending to kill everything in sight including Megumi. Yuji, still conscious within his own body, watches helplessly as Sukuna prepares to murder his friend. It is only through an extraordinary act of will that Yuji temporarily regains control, forcing Sukuna back and saving Megumi's life. This event establishes the psychological horror of Yuji's condition — he is never truly in control, and Sukuna is always watching, always waiting.
News of Sukuna's manifestation reaches the jujutsu elders, who immediately convene to order Yuji's execution. Their reasoning is cold but logical: Sukuna's vessel is a walking apocalypse trigger, and no amount of potential justifies the risk. Gojo intervenes, using his influence and overwhelming power to negotiate a compromise. Yuji will be allowed to live — and even train as a sorcerer — but only on the condition that he locates and consumes all 20 of Sukuna's fingers. Once the final finger is consumed, Yuji will be executed, taking Sukuna with him.
Pro Tip: Gojo's negotiation with the elders is one of the most important moments in the series. By buying Yuji time, Gojo sets the entire plot in motion. Every event — the Kyoto Exchange Event, Shibuya Incident, and Culling Game — happens because Gojo gave Yuji a second chance. This single decision shapes the fate of every character in the series.
Thematic Foundations & Worldbuilding
The Introduction Arc establishes the core thematic concerns that define Jujutsu Kaisen. The most prominent theme is the value of a proper death. Yuji's grandfather dies in the first chapter, offering Yuji the final words that haunt him throughout the series: "Help people. Die surrounded by loved ones." This philosophy of dying well — of giving one's life meaning through service to others — becomes Yuji's guiding principle and creates a tragic irony given his guaranteed execution.
Cursed Energy System: The arc introduces the fundamental mechanics of jujutsu. Cursed energy is generated from negative emotions — fear, anger, grief — and sorcerers learn to harness this energy for combat. The hierarchy of threat levels is established: Grade 4 (weakest) through Special Grade (strongest, disaster-level threats). The concept of binding vows — self-imposed rules that increase power in exchange for restrictions — is introduced through Sukuna's unique relationship with Yuji.
Jujutsu Society: The arc reveals a hidden society operating within the real world. Jujutsu sorcerers are organized into a hierarchical system with the elders at the top, Gojo and other special grades in the middle, and rank-and-file sorcerers at the bottom. The relationship between sorcerers and non-sorcerers is complex — ordinary people create Curses through their negative emotions but are also the ones sorcerers protect. This tension between protecting humanity and resenting them as the source of Curses is a recurring conflict explored in later arcs.
Character Dynamics: The arc establishes the interpersonal relationships that drive the series. Yuji's innate kindness and desire to help others puts him at odds with the cold pragmatism of jujutsu society. Megumi's cynicism and low self-worth contrast with Nobara's unshakable confidence. Gojo's playful exterior masks a profound loneliness and the weight of being the strongest. These dynamics create a rich character landscape that the series explores and subverts as it progresses.
Frequently Asked Questions
What happens in the Introduction Arc of Jujutsu Kaisen?
The Introduction Arc follows Yuji Itadori as he swallows Sukuna's finger to save his friends, joins Tokyo Jujutsu High under Gojo's supervision, forms a team with Megumi and Nobara, and receives a death sentence for being Sukuna's vessel with a temporary reprieve to collect all 20 fingers.
What chapters and episodes does the Introduction Arc cover?
The Introduction Arc covers chapters 1 through 18 of the manga and episodes 1 through 8 of the anime adaptation. It serves as the prologue to the larger Jujutsu Kaisen story.
Why does Yuji not die immediately after becoming Sukuna's vessel?
Yuji is spared from immediate execution because Satoru Gojo intervenes on his behalf. Gojo negotiates a deal with the jujutsu elders: Yuji will be allowed to live and train as a sorcerer, but he must collect and consume all 20 of Sukuna's fingers, after which he will be executed.
What is the significance of Yuji's grandfather's final words?
Yuji's grandfather tells him on his deathbed to "help people" and "die surrounded by loved ones." These words become Yuji's moral compass and create a tragic irony — Yuji is destined for execution, making it impossible for him to have the peaceful death his grandfather wished for him.
How does the Introduction Arc connect to later storylines?
The arc establishes every major plot thread: Yuji's role as Sukuna's vessel, the 20-finger collection quest, Gojo's position as the strongest sorcerer, Megumi's potential that interests Sukuna, and the Death Paintings concept. All later arcs — Kyoto Exchange, Shibuya Incident, and Culling Game — build directly on foundations laid in this opening arc.