Kento Nanami

Kento Nanami is an alumnus of Tokyo Jujutsu High and a highly capable grade 1 sorcerer active in the modern era.

He is introduced when Satoru Gojo assigns him to guide Yuji Itadori during an investigation into Mahito’s movie theater incident.

He comes from a non-sorcerer family, with a Danish maternal grandfather, making him a quarter Danish.

In the story and among fans he is affectionately called “Nanamin,” while some enemies refer to him as the “7:3 sorcerer” for his signature haircut and technique.

Nanami’s trademark look includes a light brown business suit, a leopard-print tie, a neatly parted 7:3 hairstyle, and distinctive glasses with no temples that function like goggles.

He wears these glasses to hide his line of sight from certain curses that react to being looked at.

Outwardly, he is stoic and unsmiling, but inwardly he is deeply compassionate and highly driven by a sense of duty.

He is known in-universe as a “proper adult” and is often described by others as reliable, serious, and quietly kind.

Name: Kento Nanami

Gender: Male

Birthday: July 3

Age at death: 28

Height: Around 184 cm

Affiliation: Tokyo Jujutsu High (alumnus), grade 1 sorcerer

Jujutsu High admission: Scouted

Cursed technique: Ratio Technique (Ten Shadows of Ratio / “Ten Sections Cursed Technique”)

Grade: Grade 1 sorcerer

Black Flash: Has used it, and holds the record for most consecutive Black Flashes (four in a row)

Hobbies and skills: Drinking, cooking for himself

Favorite foods: Bread (he is fairly gourmet about it), especially sandwiches like caskoulet-style filled breads; also likes ajillo (garlic oil dishes).

Disliked foods: Flat noodles

First-person pronoun: “Watashi” in the original, indicating a polite, adult self-reference

Image songs (author-suggested):

“Thinking in the Yura Yura Empire” by Yura Yura Teikoku

“Saboten Record” by Fujifabric

Voice actor (anime): Kenjiro Tsuda

Stage actors: Masanari Wada; Yudai Tachibana in the stage play “Jujutsu Kaisen – Hidden Inventory / Premature Death”

Nanami embodies the idea of a jaded but fundamentally decent adult trying to do the right thing.

Kiyotaka Ijichi calls him the “adult of adults,” highlighting how he behaves like a proper grown-up in a world of eccentric sorcerers.

He believes in “disciplining oneself according to the facts,” which sums up his realism and self-restraint.

He is typically expressionless, speaks politely to everyone, and rarely shows overt emotion, which can make him seem cold at first.

In reality, he is emotionally warm and deeply empathetic.

For example, during the Mahito incident he gently wipes the tears of humans who were transformed into grotesque shapes, treating them with dignity despite their horrific state.

Nanami has a strong sense of responsibility tied to his position as a grade 1 sorcerer.

When he judges a problem as difficult, he refuses to be complacent and willingly fights at full capacity, even at great risk to himself.

He tends to be blunt and pessimistic, especially toward work and institutions.

He openly calls both corporate work and sorcerer work “trash,” but still chooses to fight because he recognizes he is better suited to helping people through jujutsu than through finance.

He categorizes Yuji Itadori as a “child” at first and is reluctant to treat him as a full-fledged sorcerer.

However, as they work together, he gradually comes to recognize Yuji’s strength and resolve, ultimately affirming him as a “sorcerer” and treating him as a real colleague.

Nanami’s famous line about adulthood reflects his worldview: small disappointments accumulate and harden people into adults.

He comments that things like losing hair on your pillow or seeing your favorite bread disappear from a convenience store shelf are the kind of tiny tragedies that turn people into adults.

Nanami is from a non-sorcerer family, with a Danish grandfather on his mother’s side.

He was scouted into Tokyo Jujutsu High, where he entered as a first-year student.

As a first-year, Nanami often worked together with his classmate Yu Haibara.

They were under the supervision of their upperclassman Satoru Gojo and were frequently dragged around by Gojo’s chaotic style.

In his second year, Nanami and Yu Haibara were assigned a mission labeled as a grade 2 curse, which was in reality a grade 1-level threat.

During this mission, Haibara was killed in front of Nanami, leaving him traumatized and disillusioned with the world of jujutsu.

After graduating, Nanami left sorcery behind and took a job at a securities company, essentially running away from his past as a sorcerer.

He repeatedly told himself that he did not need “fulfillment” or “meaning” and worked grueling hours purely for money.

However, the corporate environment, where his worth was dictated by volatile performance metrics, quickly ground him down mentally.

One day, he casually exorcised a weak curse haunting a woman at his favorite bakery, and she thanked him wholeheartedly.

This sincere gratitude made Nanami realize he had been craving “being needed” and “a sense of purpose.”

He concluded that, if both office work and sorcerer work were miserable, he would at least choose the path where he had aptitude and could help people.

With that, he returned to being a sorcerer and contacted Satoru Gojo first to announce his decision.

From then on, he functioned as a reliable field operative and, unofficially, as a mentor to younger sorcerers.

He has also lived through other major tragedies: one of the seniors he once admired, Suguru Geto, later fell and became a curse user.

All these experiences led him to the conclusion that “sorcerers are trash,” yet he still stands in the line of fire for others.

Nanami is a tall man with light brown hair carefully parted 7:3, which is the origin of his name “Kento” (a pun on “seven-three”).

He typically wears a light brown suit, a leopard-print necktie, and a dress shirt, giving him the look of a refined office worker.

His glasses are unusual: they have no standard temples and resemble goggles that cling to his face.

These are not just a fashion statement; he uses them to hide his eyes from curses that react aggressively when they realize they are being watched.

In his student days, Nanami did not wear glasses and had a similar 7:3 part, though with the parting reversed and his hair slicked differently.

Despite his intellectual appearance, his body is extremely sturdy, and he is physically powerful.

Nanami is a close-combat specialist whose fighting style mixes heavy melee strikes with his ratio-based cursed technique.

He wields a large cleaver-like blade wrapped in talisman-like paper and fights at short to mid range with frightening precision.

Even without relying on his technique, Nanami is a brute-force powerhouse.

He can pulverize concrete with his fists, shrug off kicks that leave opponents feeling like they “didn’t even kick a human,” and endure sword slashes without injury, leading others to compare him to a wall of rock.

Nanami openly states that he is bad at barrier techniques.

He never attained a domain expansion or a simple domain, and this lack of defensive barriers contributed to the severe injuries he suffered during the Shibuya Incident.

In an original story for the smartphone game “Phantom Parade,” it is revealed that he can at least deploy a basic “curtain” barrier, the simplest form of jujutsu veil.

Even so, he remains much more of a frontline brawler than a technical barrier specialist.

Cursed Technique: Ratio Technique (Ten Sections Cursed Technique)

Nanami’s innate technique, often translated as Ratio Technique, imposes a weak point onto a target at a fixed seven-to-three ratio along its length.

When he divides any object or body part into a line segment, the point at the 7:3 ratio becomes a forced critical point.

This can apply to the entire body, or to individual parts such as the head or arm, and it works on both living beings and inanimate objects.

When he hits this imposed weak point, even a dull or “blunt” strike can behave like a lethal cut.

Against weaker opponents, a strike that is technically a “flat side” or non-lethal blow can still sever them completely if it lands on the ratio point.

Against stronger foes, landing a hit on that weak point still inflicts substantial damage, even if they otherwise outclass him.

By punching a wall precisely at its 7:3 point under this technique, Nanami has caused large underground structures to collapse.

The technique’s versatility allows him to adjust his attack power and effective range, making it useful in both direct combat and environmental manipulation.

However, his technique has poor compatibility against enemies who can freely alter their body’s size and proportions.

Mahito, who can reshape his body at will, is a prime example: by constantly changing his form, Mahito disrupts Nanami’s ability to define a stable 7:3 segment.

Nanami also struggles against long-range specialists, as his technique really shines at close to medium range.

When forced to fight at a distance, he relies more on environmental destruction and tactical repositioning.

Expanded Technique: Collapse (Garagara)

Nanami’s expanded technique, often localized as “Collapse,” focuses on wide-area destruction.

He uses his Ratio Technique to hit a building’s structural weak point, bringing it down and then imbuing the resulting debris with cursed energy.

The falling rubble becomes a massive, high-mass attack charged with power against curses.

When he used it in an underground setting, the shock was enough to cause an earthquake of about magnitude 2 in the surrounding area.

The raw firepower of Collapse is among the highest shown by any grade 1 sorcerer in the series.

However, its drawback is clear: the collapsing building threatens everyone nearby, including Nanami himself, so he must retreat quickly after activating it.

Binding Vow: Overtime

Nanami has a self-imposed time-based binding vow that affects his cursed energy output.

Under normal circumstances, he limits himself to about 80–90% of his true power during “working hours.”

He considers “overtime” to be a curse on his life and a negative condition, which is exactly why the binding vow works.

When his self-defined working hours are exceeded, his cursed energy increases beyond 100%, giving him a sharp power boost.

In one example, starting work at 10:00 and setting 18:00 as his clock-out time, he treats any combat past 18:00 as overtime.

During this period, his output can reach around 110–120% of his base potential.

He can technically break the vow early and voluntarily release his limit to hit 100% at any time.

However, if he does so, his total potential power drops, and the peak might only reach something like 101% instead of the much higher values he gains from “true” overtime.

In overtime mode, Nanami removes his tie and wraps it around his right hand like a bandage.

He then fights using a combination of his cleaver and enhanced bare-handed strikes.

His punches and slashes in this state become so powerful that a single blow can destroy entire sections of buildings.

His physical durability also skyrockets, allowing him to ignore ordinary slashes and kicks that would injure other sorcerers.

Black Flash

Nanami has experienced Black Flash, a phenomenon where cursed energy and physical impact coincide with perfect timing, multiplying the attack’s power.

No sorcerer can activate Black Flash at will, but Nanami holds the series record for most consecutive Black Flashes.

During the Night Parade of a Hundred Demons in Kyoto, he exorcised four grade 1 curses with four Black Flashes in a row.

This feat was initially shared in a fanbook and then expanded upon in the Jujutsu Kaisen 0 movie, confirming his record.

Nanami’s first major appearance is when he is assigned by Satoru Gojo to guide Yuji Itadori.

The two investigate a series of deaths linked to Mahito at a movie theater and an associated middle school.

At that time, Nanami insists that he is not a teacher and rejects being called “sensei.”

Still, he clearly feels a duty as an adult to protect Yuji, stating that he is the adult and Yuji is the child, and thus he must shield Yuji from unnecessary danger.

He initially refuses to acknowledge Yuji as a real sorcerer, seeing him more as a child dragged into a deadly job.

Even so, he quietly respects Yuji’s ability to become angry for the sake of others and his strong sense of justice.

During the fight with Mahito, Nanami battles him one-on-one, and Mahito himself acknowledges that Nanami is strong.

Although Mahito is still in an early growth stage, his power already surpasses typical special grade curses, underscoring Nanami’s skill.

Nanami is nearly killed in this confrontation but survives, and Yuji later joins him in battle against Mahito.

Afterward, when Yuji struggles with the idea of “a proper death,” Nanami gently encourages him, indirectly recognizing Yuji as a full-fledged sorcerer.

Yuji’s tone toward Nanami softens over time, and he starts calling him “Nanamin” as a nickname.

Nanami, in return, comes to trust Yuji deeply and even relies on him to handle vital information, such as what they receive through Kokichi Muta (Mechamaru).

During the Shibuya Incident, Nanami plays a key role on the front lines.

After Satoru Gojo is sealed, Nanami participates in multiple critical battles in the chaotic underground environment.

He defeats Haruta Shigemo and later joins the Zenin squad, including Maki Zenin and others, in fighting the special grade curse Dagon.

Together they manage to exorcise Dagon, showcasing Nanami’s tenacity even after suffering heavy damage.

Immediately afterward, Jogo ambushes them, blasting Nanami with intense flame.

Nanami is severely injured, with most of his upper body burned, and continues to move in a staggering, almost zombie-like state.

He eventually reaches the interior of Shibuya Station, where he briefly encounters Yuji Itadori again.

In this final moment, he entrusts Yuji with the future, expressing a quiet acceptance of his own fate.

Soon after, Mahito finds Nanami in this weakened state and uses Idle Transfiguration on him.

Nanami dies there, killed by Mahito’s technique, his body and face distorted as Yuji watches in horror.

After his death, at least one item linked to his technique remains behind as a cursed tool.

This embodies the residue of his Ratio Technique and stands as one of the few tangible remnants of him after Shibuya.

Satoru Gojo

Nanami is one year below Satoru Gojo at Tokyo Jujutsu High.

When he decides to return to sorcery from the corporate world, the first person he calls is Gojo.

His evaluation of Gojo is sharp and unsentimental.

He says that he trusts Gojo and relies on him, but does not respect him, describing Gojo as “textbook frivolousness hiding a dark, monstrous strength.”

In a related novel, Nanami also calls Gojo a senior who is “hard to look up to,” a sardonic jab at Gojo’s personality.

Despite this, Gojo, in turn, trusts Nanami deeply and gives him important responsibilities, such as mentoring Yuji.

Yuji Itadori

Yuji initially calls Nanami “Nanami-sensei” by instinct, despite Nanami not being a formal teacher.

After being corrected, Yuji starts to refer to him affectionately as “Nanamin.”

At first, Nanami considers Yuji a child who should be protected and not yet recognized as a true sorcerer.

However, during their missions and after witnessing Yuji’s resolve, Nanami ultimately acknowledges him as a legitimate sorcerer.

Nanami appreciates that Yuji can become angry on behalf of others rather than just himself.

He later encourages Yuji when he is shaken over what constitutes a “proper death,” subtly affirming Yuji’s path as a sorcerer.

Yuji, for his part, trusts Nanami as a dependable adult.

He even passes on crucial information from Kokichi Muta to Nanami first, demonstrating how much he values Nanami’s judgment.

Takuma Ino and Other Sorcerers

Takuma Ino, a younger grade 2 sorcerer, idolizes Nanami to an extreme degree.

Ino claims that there is no point in becoming grade 1 unless the promotion comes with Nanami’s recommendation.

Ino already has power on par with a semi-grade 1 sorcerer but remains officially grade 2, partially because he wants Nanami’s approval.

When Ino learns that Yuji casually calls Nanami “Nanamin,” he is shocked and a bit disturbed, since he sees Nanami as someone who deserves utmost respect.

Many other sorcerers also hold Nanami in high regard.

Even blunt and irreverent types like Megumi Fushiguro, Maki Zenin, and Aoi Todo address him respectfully as “Nanami-san” or “Mr. Nanami.”

Because of his reliability, composure, and underlying kindness, Nanami is widely seen as perhaps the “best person” in the cast.

Fans and characters alike view him as the ideal “dependable adult” in a chaotic, dangerous world.

The series’ author has even joked to fans that, if they were to fall for a character as a romantic partner, they should choose Nanami rather than Satoru Gojo.

This comment underscores how “solid” and mature Nanami is compared to more flamboyant characters.

Nanami’s time in the securities firm highlights the contrast between sorcerer work and corporate work.

In the company, his contributions were reduced to numbers and charts, and his sense of self was constantly whiplashed by fluctuating performance metrics.

He convinced himself that “meaningful work” was unnecessary and that he only needed money.

Nevertheless, the emotional void and relentless pressure of corporate life clearly wore him down.

The turning point came when he exorcised a low-level curse attached to a woman at a bakery he frequented.

Her genuine gratitude struck him more deeply than any monetary bonus, revealing that he had always wanted to be needed and to do meaningful work.

From then on, he returned to the jujutsu world, though he did not suddenly start romanticizing sorcery.

Instead, he accepted that both corporate life and sorcery are “trash,” but since he had aptitude as a sorcerer, he chose the path where he could protect people.

Within the story, Nanami is one of the most universally respected and trusted adult sorcerers.

Despite his gruff demeanor, he consistently shows compassion toward subordinates, civilians, and even the transformed victims of curses.

He often acts in ways that reduce risk for his juniors, even when he verbally denies being a teacher or mentor.

During his first mission with Yuji, he insists that, as the adult, he is obligated to protect Yuji and minimize the danger Yuji faces.

He hides his own idealism under a layer of cynicism and deadpan humor.

That tension between his pessimistic words and caring actions is a big part of his appeal.

Because of this, many fans consider him the series’ “best guy” or “best adult.”

The juxtaposition of his strict, no-nonsense persona with his gentle treatment of others makes him stand out.

One of Nanami’s most quoted lines concerns how people become adults.

He explains that things like seeing more hair on your pillow in the morning, or realizing that your favorite prepared bread has vanished from a convenience store shelf, are the small, accumulating disappointments that turn people into adults.

Mobile and Console Games

Nanami appears as a playable character in several collaboration events and games, which often reference his overtime gimmick and ratio technique.

In the mobile game White Cat Project (Shironeko Project), he appears as a playable swordsman during a Jujutsu Kaisen collaboration.

His signature cleaver is available as a weapon, and his abilities are enhanced between 18:00 and 10:00 in real-world time, reflecting his “overtime” concept.

During these hours, his skill costs are reduced, he gains resistance to status effects like stun and seal, and the damage of both his normal attacks and skills increases.

One skill targets enemies positioned at a 7:3 ratio, and another called “Collapse” immobilizes foes, mirroring his ratio technique and expanded technique.

In Monster Strike’s Jujutsu Kaisen collaboration, Nanami appears as a gacha unit.

He was implemented as a high-rarity unit, even above some main characters like Megumi Fushiguro and Nobara Kugisaki.

After 18:00 in real time, he gains a slight attack boost that references his “overtime work” vow.

Additionally, his strike shot move, based on the Ratio Technique, includes a hidden easter egg: if he lands the finishing blow on certain bosses, the enemy’s artwork is visually segmented in a seven-to-three split.

For example, in the super-difficult quest “Idle Transfiguration,” the boss artwork of Aoi Todo and his idol Takada changes so that Todo appears on the left and Takada on the right, neatly dividing them at the 7:3 point when Nanami’s finisher triggers.

These small details honor his role and style from the original manga and anime.