Eiji

Biodata

Feature	Details
Name	Eiji (英智)
Alias(es)	Eiji Zenin; Dongfang Eiji
Species/Race	Human; reincarnated into the Zenin Family 1
Gender	Male
Affiliation	Zenin Family (former); Tokyo Jujutsu High; Tokyo Branch; Eastern Folklore Research Institute
Occupation/Role	Jujutsu sorcerer; Ten Shadows Technique user; Heroic Spirit summoner; Acting Head of the Zenin Family; Jujutsu High instructor
First Appearance	Chapter 1
Family	Sho Zenin (father, deceased); Chiyoko Yukimura (mother, deceased) 5

Power Progression

Stage / Realm / Level	Chapter	Notes
Maximum physical constitution and talent	2	A system identifies the world as Jujutsu Kaisen and raises Eiji’s physical constitution and talent to their maximum level.
External Technique: Imaginary Foundation: Holy Grail	2	Receives the Holy Grail-based External Technique and initially summons Mahoraga.
Ten Shadows Shikigami expansion	6 10	Tames Nue, then uses Toji Fushiguro’s assistance to subdue Max Elephant and challenge Tiger Funeral.
Reverse Cursed Technique	24	Learns Reverse Cursed Technique, allowing him to fight more aggressively without fearing ordinary injuries.
Mahoraga tamed	40 43	Uses a coordinated taming plan involving Shikigami, Shadow Servants, and Artoria’s Noble Phantasm; later acknowledged as having subdued Mahoraga.
Domain Expansion: Abyssal Dark Veil Court	71 73	Develops a Domain Expansion by age fifteen; can also use it incompletely to counter an opponent’s sure-hit effect.
Shadow World access and Maximum Technique: Ten Shadows Wheel	111	Repairs the Michigaeri Gem, restores Little White, opens the Shadow World, and gains wings and a weapon through the Ten Shadows Wheel.
Heroic Spirit Possession	392 407	Can descend a Heroic Spirit’s power onto himself, gaining a transformed armored form and combat experience from Artoria.
World’s strongest	484	By the end of his era, Heroic Spirit Possession and a matured Mahoraga make him stronger than Satoru Gojo.

Background / History

Eiji was reincarnated into the Zenin Family. Before awakening as a sorcerer, he understood enough about cursed techniques to fear that the family could track him through personal belongings. The Zenin Family had already decided to dispose of him to uphold its rules. When six-year-old Eiji failed to awaken a technique, his mother, Chiyoko Yukimura, lost hope of advancing through him and took her own life. 1 5

His circumstances changed when the system enhanced his body and talent, gave him the Holy Grail External Technique, and enabled his first summoning of Mahoraga. The Gojo and Kamo factions both learned of his existence soon afterward and sought to conceal or recruit him rather than let the Zenin Family regain him. 2 5

Eiji lived apart from the Zenin Family in Osaka, developed a rapport with Satoru Gojo, and requested a new identity. Gojo arranged documents listing Eiji’s birthdate as December 8, 1989—one day after Gojo’s own. 5 7 Eiji subsequently trained the Ten Shadows Technique, researched Heroic Spirit Summoning, and sought out Toji Fushiguro as a close-combat sparring partner and taming ally. 10 37

Before enrolling at Jujutsu High in April 2005, Eiji successfully created a stable Spirit Origin Shadow. His first confirmed Imaginary Heroic Spirit was Artoria, whose appearance forced the Jujutsu Management Council to recognize Heroic Spirits as distinct from cursed spirits after she demonstrated her Noble Phantasm before them. 37 53

Eiji’s goals gradually expanded from escaping the Zenin Family to restructuring the entire Jujutsu World. He proposed a barrier-based “Small World” to collect leaked cursed energy and prevent cursed spirits from being born, while using Heroic Spirits and transformed sorcerers to handle exorcism work. 122 He later acted on this ambition by purging Zenin opposition, taking the position of Acting Head, building alliances with major families, and placing allies throughout jujutsu administration. 211 212 269

Personality

Eiji is calm, calculating, and unusually pragmatic for his age. He prefers planning around systems, logistics, personnel, and long-term incentives rather than relying only on individual strength. His experience working in organizations before reincarnation informs his belief that managing people is more difficult than defeating enemies. 119 269

He can be playful and provocative, particularly around Satoru Gojo and Takako Uro. He deliberately imitates Gojo’s taunting mannerisms, uses wagers during spars, and enjoys embarrassing his rivals when he has the advantage. 54 181 407

Despite his ambition and ruthless actions against hostile Zenin members, Eiji is protective of people he considers his own. He mentors younger sorcerers, gives Choso and his brothers shelter, worries about Toji’s well-being, and tries to keep Yuji Itadori from being exposed to the cruelest aspects of the jujutsu world. 74 202 236 443

His attachment to Artoria is especially intense. When Tomie copied Artoria’s face, Eiji became enraged and attacked with overwhelming force, exposing his possessive love for her. 331

Abilities & Skills

Ten Shadows Technique

Eiji is an orthodox user of the Zenin Family’s Ten Shadows Technique. He treats its shikigami as coordinated combat units rather than isolated summons.

• Commands Divine Dogs, Nue, Rabbit Escape, Max Elephant, Tiger Funeral, Round Deer, Qiongqi, Mahoraga, and other shadow-based summons. 6 10 19 40
• Explains that the Ten Shadows Taming Ritual cannot be aided by outside cursed energy and requires fair conditions at the ritual site. 7
• Stores objects and supplies in his shadows, including Choso’s belongings. 203
• Travels through shadows for rapid movement and infiltration. 180 378
• Creates shadow clones capable of misleading opponents in direct combat. 181
• Shapes shadows into constructs such as tables, chairs, storage spaces, and defensive barriers. 114 391

Mahoraga and Adaptation

Mahoraga is Eiji’s strongest shikigami and a central part of his combat style.

• Initially manifests it through the Holy Grail system and uses Command Spells to dismiss or recall it. 2 3
• Formally subdues it through a costly, coordinated ritual involving Artoria and multiple Shikigami. 40 43
• Uses the Wheel of Dharma to adapt to hostile phenomena, including Kagewani’s curse. 71
• Employs Mahoraga as an executioner and duelist during the Zenin Family purge, repeatedly defeating Ogi Zenin. 212
• Its mature state, paired with Heroic Spirit Possession, eventually surpasses Satoru Gojo’s power. 484

Imaginary Foundation: Holy Grail

Eiji’s External Technique is based on the Holy Grail and its soul-materialization principles.

• Summons Imaginary Heroic Spirits, including Artoria, Medea, Emiya, Medusa, Sasaki Kojiro, and Hundred-Faced Hassan. 53 231 389 443
• Uses Command Spells to immediately recall Heroic Spirits to his side. 83
• Researches the soul as the likely foundation of jujutsu, using the Holy Grail’s Third Magic-derived properties to investigate the Ten Shadows Technique. 110
• Later builds the Hall of Heroes around the Holy Grail, preserving the souls of those connected to him before their deaths. 490

Heroic Spirit Possession

Eiji can place a Heroic Spirit’s power onto himself rather than only summoning it separately.

• Takes on armor resembling Artoria’s, though altered into a more masculine form. 392
• Gains combat experience from Artoria’s possession while fighting Abe no Seimei. 407
• Uses possession alongside Ten Shadows Wheel-enhanced mobility in high-level battles. 323 331

Reverse Cursed Technique

Eiji can generate positive energy to repair injuries and counter cursed effects.

• Learns the technique during the battle against the Demon Cursed Spirit. 24
• Heals wounds inflicted by Kagewani’s curse after increasing his output. 71
• Removes poisoned flesh before healing himself when struck by an assassin’s venom-coated dagger. 160
• Uses Reverse Cursed Technique offensively to rapidly age Tomie. 331
• Recognizes that even highly efficient healing cannot guarantee his safety and intends to improve his mental resistance. 331

Domain Expansion: Abyssal Dark Veil Court

Eiji’s Domain Expansion manifests as an abyssal shadow space filled with shikigami.

• First clashes it against the Shadow Crocodile’s Abyssal Shadow Prison. 72
• Uses Artoria’s support to break the opposing domain, after which his shikigami devour the Shadow Crocodile. 72
• Can deploy an incomplete version to neutralize the sure-hit effect of Kenjaku’s Open Domain without fully exposing his own domain shell. 95

Ten Shadows Wheel

Eiji and Mahoraga develop the Maximum Technique: Ten Shadows Wheel after he opens the Shadow World.

• Grants him wings and a weapon. 111
• Enables high-speed aerial movement supported by wind and lightning. 323 331
• Appears above his head during combat, functioning alongside his adaptive shadow techniques. 331 391

Swordsmanship and Hand-to-Hand Combat

Eiji is a capable close-range fighter who actively sought training from specialists.

• Regularly spars with Toji Fushiguro, whose uncompromising instruction improves Eiji’s combat ability. 37
• Uses feints, kicks, defensive adjustments, and positional awareness during close-quarters exchanges. 37
• Reaches a respectable level of swordsmanship through sparring with Isayama Naraku; even Artoria would require time to defeat him. 154
• Fights Abe no Seimei in a sword duel and studies his opponent’s cursed-energy manipulation mid-battle. 407

Strategic Leadership

Eiji combines combat strength with administration, intelligence gathering, and political maneuvering.

• Plans to reform the Jujutsu World through control of the Zenin and Gojo Families, alliances with local families, and selective recruitment or elimination of opponents. 122 269
• Uses experimental cursed tools, funding, and personal connections to build influence among local jujutsu families and departments. 263
• Arranges personnel according to their abilities after the Tokyo Branch suffers major losses. 333
• Deploys Hundred-Faced Hassan’s eighty assassin entities to gather intelligence on Curse Users. 443
• Uses Sukuna’s Fingers as bait to lure Kidomaru into a trap. 389
• Establishes a cultural event in Shibuya to protect civilians from Kenjaku’s hostage operation. 452

Equipment / Weapons / Items

• Tang dao — Used in close combat against cursed spirits and shapeshifters. 24
• Wooden sword — Used for sparring with Isayama Naraku. 154
• Command Spells — Used to dismiss and recall Heroic Spirits or Mahoraga. 3 83
• Michigaeri Gem — A soul-bound item repaired after Eiji opened the Shadow World; its restoration returned Little White as a Ten Shadows shikigami. 111
• Holy Grail — The core of his External Technique and, later, the Hall of Heroes. 110 490

Relationships

• Satoru Gojo — Friend, rival, and political ally. Gojo arranges Eiji’s new identity, helps him tame shikigami where possible, and later supports the restructuring of the Jujutsu World. 7 122 477
• Artoria — Eiji’s first known Imaginary Heroic Spirit and closest companion. She fights beside him, manages the Tokyo Branch, and is the subject of Eiji’s intense devotion. 53 72 331 349
• Toji Fushiguro — Sparring mentor and ally. Toji helps Eiji tame shikigami and joins him in purging the Zenin Family. 10 37 212
• Suguru Geto — Best friend and fellow shikigami-oriented sorcerer. Eiji shares jujutsu knowledge with Geto and later coordinates with him in wider political and combat operations. 37 43 122
• Naobito Zenin — Pragmatic Zenin elder who recognizes Eiji’s potential and ultimately publicly acknowledges him as Acting Head. 73 74 212
• Tengen — Barrier master whose passivity Eiji identifies as a weakness. Eiji gradually takes control of the nationwide barrier network that she maintained. 116 450
• Yuki Tsukumo — Ideological counterpart in the effort to eliminate cursed spirits. Eiji presents her with his “Small World” proposal and plans for taking control of the Jujutsu World. 122
• Choso — Ally recruited after Eiji offers shelter for him and his brothers in exchange for service. 202 203
• Maki Zenin and Mai Zenin — Students personally cultivated by Eiji after the Zenin purge. 263
• Rika Orimoto — Adopted by Eiji and treated as family alongside Yuta Okkotsu. 236 263
• Yuji Itadori — Student Eiji wishes to protect from becoming emotionally hardened by the jujutsu world. 443
• Kenjaku — Long-term enemy whom Eiji tracks, politically pressures, and eventually uses as an unwitting catalyst for his plans to reshape society. 305 450
• Abe no Seimei — Enemy summoner and sword-fighting opponent during the final conflict. 391 407 477

Major Arcs

Escape from the Zenin Family

• Faces disposal by the Zenin Family after failing to awaken a technique as a child. 1 5
• Gains the Holy Grail system, maximum potential, and initial access to Mahoraga. 2
• Avoids returning to the Zenin Family while the Gojo and Kamo factions attempt to claim him. 5

Ten Shadows and Heroic Spirit Development

• Tames additional Ten Shadows shikigami with Toji’s assistance and trains in cursed energy daily. 10 37
• Creates a stable Spirit Origin Shadow and summons Artoria before entering Jujutsu High. 37 53
• Formally tames Mahoraga through a coordinated ritual. 40 43
• Achieves Domain Expansion at fifteen after defeating the Shadow Crocodile. 72 73

Reforming the Jujutsu World

• Reveals his plan to create a world without cursed spirits and to take control of the major jujutsu families. 122
• Takes the Zenin Family’s leadership through force, with Toji eliminating opposition. 211 212
• Builds influence through local families, administration, funding, cursed-tool development, and personnel placement. 263 269 333

Instructor and Protector

• Returns to Tokyo Jujutsu High as an active instructor for a class largely composed of people personally connected to him. 252 263
• Advises Panda and Maki on possible paths to strength. 258 260
• Oversees student training while trying to spare them from operations against human Curse Users whenever possible. 378 443

Final Conflicts and Consolidation

• Battles Tomie after she takes Artoria’s appearance and overwhelms Kenjaku when he intervenes. 331
• Defends Tokyo Jujutsu High against Abe no Seimei and Kenjaku’s forces through traps, Heroic Spirits, and Heroic Spirit Possession. 389 392 407
• After Abe no Seimei’s defeat, expands his influence into Kyoto and general society as Jujutsu Headquarters relocates to Tokyo. 477
• Reaches the pinnacle of power and eventually establishes the Hall of Heroes, pursuing cross-world travel after his era ends. 484 490

Trivia

• Gojo deliberately arranged Eiji’s new birthday to be exactly one day after his own: December 8, 1989. 7
• Eiji has a habit of using shadows for mundane conveniences, including furniture, storage, and transportation. 114 203 378
• He considers Artoria’s Riding skill sufficient reason to buy her a motorcycle. 53
• Eiji initially dismissed assassination as a “minor art,” but later changed his view and summoned Hundred-Faced Hassan for intelligence work. 443
• He regards Mahito as too useful for research—and too cute—to exorcise immediately. 368