Kaiyō Tameyama/Synopsis

## History

At seven, Jujutsu Headquarters takes custody of Kaiyō after a mishap involving his Cursed Technique. He soon enters a Binding Vow with the Higher-Ups to restrict its usage — despite this, he's referred to as a Special Grade sorcerer.

A few years later, he meets Satoru Gojo on the Higher Ups' orders, accompanying him on a mission. When it concludes, Gojo introduces Kaiyō to Megumi Fushiguro and his sister, Tsumiki. Kaiyō becomes friends with the Fushiguros.

During the Night Parade of a Hundred Demons, he participates in exorcising the cursed spirits released by Suguru Geto. He unleashes Black Flash on a Grade 1 curse, successfully killing it.

Before Yuta Okkotsu leaves for overseas, Kaiyō meets the then-first years.

## Synopsis

### Fearsome Womb Arc

Kaiyō arrives at the building in Roppongi just as Nobara Kugisaki and Yuji Itadori exorcise the curse. He comments on her Cursed Technique being "cool" before joining Megumi and Gojo outside. When the group meets back up, he introduces himself to the others, explaining that he was in Yokohama for most of the day. As the mission is complete, he heads out with the rest to eat, agreeing with Nobara for sushi.

One month later, Kaiyō joins the rest of his classmates on a mission to the Eishu detention center. Kiyotaka Ijichi informs the group that they may face a high-grade spirit, but they should prioritize the survivors instead. He expresses his annoyance at the situation when, suddenly, a woman arrives and begins asking about her child. When Yuji says they'll save them, Kaiyō rolls his eyes with a smile.

He heads into the detention center with the others after Ijichi brings down the curtain. As Megumi summons his Divine Dogs, Kaiyō turns on his digital music player. The group notices that the inside of the detention center has warped due to the magical force, which causes the entrance to disappear. Kaiyō laughs as Yuji and Nobara freak out about the missing exit before Megumi informs them that his shikigami can locate it. He praises Megumi alongside the others, calling him "the best" before they move forward.

Further along, they come across a room full of corpses. Kaiyō wanders away from the group as Yuji notices that one of them is the child of the woman at the gate. He begins to return due to the commotion, only to be teleported away. He finds that Nobara is with him, and they prepare to take on the cursed spirits together.

Due to the number of curses, Kaiyō missteps, causing the spirits to break his *kaiken*. As a particularly strong one grabs him, he apologizes to Nobara for being weak. However, Megumi arrives just then, rescuing the two with his frog shikigami.

The three rush out of the detention center, exhausted. As Ijichi readies to take Nobara to the hospital, Kaiyō asks about Yuji. Megumi solemnly tells them to bring a sorcerer higher than Grade 1. He hesitates before entering the car, telling Megumi to be careful.

The next day, Kaiyō meets with the Jujutsu Higher-Ups. He's visibly distraught as he demands to know why they were assigned that mission. When the Higher-Ups brush off his questions, he threatens to use his Cursed Technique. However, they remind him of his Binding Vow, sneering at him about the unknown punishment for breaking one. Enraged with their attitudes, Kaiyō leaves.

Returning to the main campus, he sees the second and first-years conversing. When he joins in, Panda urges Kaiyō to compete alongside them in the Kyoto Goodwill Event. He expresses his dislike, stating that he can't deal with the "monsters" from Kyoto. But his peers agree to participate, and he begrudgingly accepts, not wanting to be left out.

Sometime later, Kaiyō goes to find Satoru Gojo. He enters Gojo's hidden room to check but finds Yuji watching movies instead. They awkwardly stare at each other before a Cursed Corpse punches Itadori. Kaiyō laughs as Yuji yells at the corpse, which confuses the pink-haired boy. Kaiyō collects himself, asking if Yuji has seen Gojo. When Yuji replies that Gojo has just left, he huffs in disappointment. Itadori questions why he needs their teacher, to which Kaiyō explains that the Higher-Ups have shifted his Grade from Grade 2 to Special Grade.

Yuji voices his amazement, only for Kaiyō to state that it's temporary. He further clarifies that the Higher-Ups moved his rank because of his Cursed Technique and that they'll revert it soon. Kaiyō assures Itadori that he'll keep this secret between them and leaves before his classmate can inquire more — not before he tells Yuji to let Gojo know he's looking for him, however.

After training one day, the first-years encounter Aoi Todo and Mai Zen'in, students from the Kyoto branch. When Megumi asks why the two are there, Mai mocks their deceased classmate. The three are irritated at her words, but Todo interrupts and begins testing Megumi, seemingly innocuously asking his type. Kaiyō tries to intervene between them, saying this isn't a good time. Todo doesn't listen, instead explaining why he asked. When Megumi replies with his answer, Kaiyō winces at Todo's reaction. Todo begins to attack Megumi. He and Nobara try to help, only for Mai to cleanly shoot him.

Maki soon appears, distracting her twin enough for Nobara to restrain Mai. Kaiyō teases Mai for her predicament, thanking his senior as Todo returns and declares they leave. He sighs in relief as he watches the two depart before regrouping with everyone else.

### Kyoto Goodwill Event Arc

On the event day, Kaiyō appears with the other students of Tokyo High. When Nobara learns the event will happen in Tokyo and grows upset, he's visibly amused at her reaction. The Kyoto faculty and students soon show up, causing Kaiyō to sigh in annoyance. As Gojo reveals a still-alive Yuji, he's the only one in the group not shocked by the revelation. Nobara realizes this, demanding to know why. He brushes her off with a comment about a "long story," which she huffs at. After the faculty explain the rules of the event, he and his peers attend a meeting to plan. During the meeting, Kaiyō interjects about the uneven amount of players now that Yuji is participating. He offers to drop out so that it won't be unfair, only for the rest of his classmates to refuse.

Once the event begins, Kaiyō travels with the other Tokyo students before Todo intercepts their path. The group splits, running off in different directions. A few moments later, he stops at a clearing to assess the situation. Feeling uneasy about leaving Yuji alone to handle Todo, Kaiyō decides to help him. He returns to see the Kyoto students attempting to kill Yuji before all of them suddenly switch positions.

Todo threatens to kill them since they got in his way, forcing them to retreat. Kaiyō curses at the situation for being a pain as Todo and Yuji restart their fight. He watches them for a while, cautiously waiting for a moment to intervene. Kaiyō leaps into action when the moment presents itself, unsheathing his *kaiken*. As he's about to stab Todo with his back turned, Kaiyō's startled by the Kyoto student's outburst, clumsily falling to the ground.

The two others take notice of his sudden appearance, asking why he's there. As he embarrassingly gets up, Kaiyō asks if the Kyoto students are trying to kill Yuji. Itadori is shocked at the accusation before Todo confirms it. However, Todo clarifies that he won't allow harm to befall his "best friend," which Yuji vehemently denies. Kaiyō hesitantly nods before leaving, only for Todo to question his taste in women. He makes a disgusted face at the notion, telling Todo he doesn't have a type. However, the third-year doesn't let up and continues to press him. He rolls his eyes before sarcastically saying that crazy people are his type. Todo laughs at his answer, telling him that crazy women are good. When Todo turns back to Yuji to comment on his cursed energy, Kaiyō attempts to leave again, but Todo and Yuji begin to fight again, blocking his way. He grits his teeth and joins the fight.

Kaiyō senses that Yuji and Todo are thrown off by his appearance in their fight, which allows him to activate the Cursed Tool on his hip. It stuns them momentarily, letting him take a stab at Todo. The older sorcerer recovers just before the blade makes contact and dodges — Kaiyō calls out to Yuji, telling him they'll win the event. Yuji agrees, declaring the three will go all out.

In the middle of their fight, a veil covers the battleground. Kaiyō pauses with the others, narrowing his eyes. Later, the three rescues Megumi and Maki from the Special Grade curse infiltrating the site. Before the others retreat from the veil, he taunts Megumi about how roughed up he is. As Megumi yells back at them not to die, Kaiyō waves him off.

He begins to engage Hanami, only to be stopped by Todo. Todo says they won't interfere until Yuji lands a Black Flash, which Kaiyō states is too advanced for someone so new to jujutsu. Todo stands firm in his belief, saying that if anyone can do it, it's his best friend. Kaiyō retorts that even he didn't manage to unleash Black Flash until last year, despite being labeled as a Special Grade sorcerer.

Kaiyō watches as Yuji fails to land a Black Flash, which prompts Todo to start lecturing about anger in fights. As Todo's words rejuvenate Yuji, he wishes his classmate luck. Soon after, Yuji hits Hanami with Black Flash, much to Kaiyō's surprise.

With Yuji now understanding the core of cursed energy, the three begin their assault on Hanami. After evading and getting some hits in, Todo uses his Boogie Woogie technique. As Todo reveals his hand, Kaiyō reactivates his Cursed Tool, adding to the confusion. The three combined continue to overwhelm Hanami, just for Yuji to land four Black Flashes in a row. Kaiyō laughs in glee and uses the opportunity to carve his blade into the curse's back.

The fight continues, returning to the river where they rescued Megumi and Maki. Todo uses his Technique to obtain Playful Cloud, disorienting Kaiyō. When Todo sends Hanami flying with the staff, he goes to exorcise the curse. Just as Hanami is about to activate his Domain Expansion, Gojo arrives to break the veil.

Kaiyō sighs in relief at seeing their teacher but growls about him being late. He and Todo stop Yuji from rushing into Hollow Purple's range. He stares at the aftermath of Gojo's attack, rhetorically asking how he still can be considered Special Grade.

After dealing with the intruders, the first-years convene to discuss what happened. As Megumi brings up Yuji's exceptional growth, Kaiyō laments how restrictive improvement can be if you're not allowed to do something. Nobara asks what he means — he explains his Cursed Technique and how he entered a Binding Vow that seldom lets him use it. The four of them continue the conversation, agreeing to get stronger together. When Todo shows up and Yuji runs away, Kaiyō joins Megumi and Nobara in their confusion.

Sometime after, everyone meets to decide if the Goodwill Event should continue. After a unanimous vote, everyone agrees to play baseball. However, due to the uneven number of players, Kaiyō decides to sit out and cheer from the bleachers. When Nobara becomes angry at the Mechamaru pitching machine, he eggs her on. When Maki interrupts Todo's speech with her pitch, he joins everyone in complimenting her. Once concluded, the Tokyo team wins.