0. Conclusion — Sukuna’s weakness is not academics; it is “why should I adjust to you?”
Drop Ryomen Sukuna into an ordinary school and the biggest problem probably is not math, English, or science. It is the fact that he would see almost no reason to adjust himself to the convenience of a group.
The official anime site describes Sukuna as the King of Curses who lived more than a thousand years ago and defeated the combined efforts of sorcerers in the golden age of jujutsu.[1] The final manga volumes also place him against one elite opponent after another.[2][3] None of that proves he would score 100 on a math exam. It does, however, make “Sukuna cannot keep up because the material is too hard” a very strange school-AU premise.
His fictional report card would look more like this:
| Area | Prediction | Comment |
|---|---|---|
| Academics | Around 5/5 | Fast learner; motivation is the real issue |
| Physical ability | 5+ | The PE teacher gives up grading |
| Moral education | Written 5 / practice 0 | Knows the expected answer, refuses to adopt it |
| Choir | Skill unknown / cooperation 1 | Not “cannot sing”; more “will not blend” |
| Group work | 0–1 | Finishes alone and deletes the point of the group |
| Attendance | 2 | Spawns only when an interesting challenge appears |
So Sukuna’s worst “subject” is not in the curriculum. It is cooperative work.
1. The problem is not “he cannot learn”; it is “why should he obey?”
School is not only a knowledge system. It is also a synchronization system. Arrive at a fixed time. Sit in an assigned place. Start when the teacher says. Divide roles. Wait for other people even when you finish early.
That is where Sukuna and school become structurally incompatible.
The question would not be “Can he do it?” but “Why should he accept this rule as binding on him?”
“Because it is a school rule” is weak. “Everyone else follows it” is even weaker. Being the majority does not seem like something Sukuna would treat as a source of legitimacy.
This produces the opposite of a normal academic failure pattern.
Not: cannot do it → cannot participate.
Instead: can do it → sees no reason to participate.
For a teacher, that is much harder to operate.
2. He would probably be good at many subjects — and still break the report card
Math and science look like good fits in this thought experiment. That is speculation, not canon, but Sukuna repeatedly reads conditions, analyzes techniques, and combines options under pressure. Rule-based and abstract problems at least look compatible with that style of thinking.
Language arts do not look like a weakness either. His verbal precision is often as sharp as his attacks. Classical literature becomes especially funny because a man from more than a thousand years ago is now sitting in a classroom as if the primary source itself enrolled in school. That does not mean he automatically knows modern grammar-test conventions; the joke and the grade are separate things.
PE is easy until rules and coordination appear. A sprint? Fine. Formation drills, paired exercises, synchronized movement? Suddenly the problem is political rather than physical.
Home economics and shop class have the same energy: high practical potential, catastrophic group process. If four students are supposed to split cooking jobs and Sukuna simply completes all four jobs himself, dinner succeeds and the educational objective dies.
History would be hilarious because the teacher has a living witness from a millennium ago. Civics, on the other hand, reaches majority rule, shared decision-making, rights and duties — and the lesson becomes a debate show.
Then come the two real hazards: moral education and music.
3. Moral education — not “he does not know the right answer,” but “he knows it and declines”
It is tempting to give Sukuna zero in moral education. The funny part is that he might do extremely well on the written test.
Psychology distinguishes, among other things, understanding what another person thinks or feels from emotionally sharing or responding to that state. These are often discussed as cognitive and affective aspects of empathy.[7] That research is not a diagnosis of Sukuna. It simply gives us a useful distinction: understanding another person and wanting to help that person are not the same operation.
Sukuna frequently reads intentions, weaknesses, desires, and fear. He is not convincingly described as someone who hurts people because other minds are incomprehensible to him.
Imaginary classroom:
Teacher: “A classmate is upset. What would make them feel safer?”
Sukuna: “Listen, identify what they want, and help if necessary.”
Teacher: “Correct. Will you do that?”
Sukuna: “Why would I?”
Understanding: 100. Adoption: 0.
That is a nightmare for moral education. If a student does not understand the expected answer, you can teach it. If the student understands it perfectly and asks why it should become his goal, the class has suddenly become philosophy.
4. Choir — the issue is not singing; it is synchronization
Canon tells us nothing about Sukuna’s singing ability. The joke is about the structure of choir.
Choir is not “the strongest singer outputs at maximum volume and wins.” A singer has to listen to everyone else, control volume, match entrances, tempo, vowels, breathing, and balance.
Teacher: “Listen to the group and bring your volume down a little.”
Sukuna: “Why am I the one adjusting?”
And the system crashes.
Even if school-AU Sukuna could memorize melody and harmony after one listen, technical ability would not solve the problem. Skill 100 plus willingness to cooperate 0 still does not produce a choir.
The moment he sings at full power, the concert becomes:
“Ryomen Sukuna feat. Class 2-3.”
When the conductor asks him to back off, the problem is no longer musical. It is constitutional.
5. Group activities — he can do them all and still destroy the point
Formation drill: Sukuna sees no reason to maintain distance from the person in front of him.
Long-rope jumping: he can obviously jump; the irritation is having to synchronize with thirty people. The likely conclusion is, “Make the rope match me.”
Three-legged race: if his partner is slow, he might simply carry the partner. Fastest time, immediate disqualification. Wins the race, loses the lesson.
Cooking class: completes all four roles alone. Food finished; teamwork deceased.
School festival planning: “Let us all discuss and decide together” may be the most dangerous sentence in the building. Sukuna’s answer is probably, “Use my plan.”
His compatibility formula is therefore simple:
Equal-member cooperation × / temporary alliance of interests ○ / cooperation under his command ◎
The problem is not that he cannot do anything with other people. The problem is adjusting himself downward or sideways to function as one equal member of a group.
6. Why the normal discipline cards do zero damage
Psychological reactance is the idea that people may resist when they feel their freedom is being restricted. A recent meta-analysis reports that highly freedom-threatening language — “you must,” “you have to” — tends to produce more reactance than softer, autonomy-supportive language.[4]
There is obviously no study measuring Sukuna on a reactance scale. But as a lens for this school AU, it is almost too perfect.
“Because it is the rule.”
“Everyone does it.”
“Do what the teacher says.”
All three cards look like 0 damage.
Self-determination theory also emphasizes autonomy, competence, and relatedness as important for motivation. A 2024 systematic review and meta-analysis covered 36 studies with 11,792 participants and reported effectiveness for interventions supporting autonomy and competence in educational settings.[5]
For Sukuna, the obvious bait is not relatedness. It is autonomy plus competence.
“Do it for the class” probably fails.
“This is a difficult task that raw individual strength alone cannot solve” might make him look up.
7. The crayfish-fishing strategy — do not beg; dangle “can you actually do this?”
This produces the crayfish-fishing method.
You do not drag Sukuna into cooperation. You dangle an interesting, difficult skill challenge in front of him and let him grab it himself.
Teacher: “You do not have to join choir. Matching thirty people’s breathing and volume with zero drift is a different skill from singing alone, though.”
Sukuna: “…”
🎣 Bite.
Teacher: “You can skip long-rope too. Being individually fast does not solve this one.”
Sukuna: “Who are you calling incapable?”
🎣 Second crayfish.
Say, “Gojo-sensei could do it,” and he may take the fishing rod with the bait.
Experimental work also suggests that intrinsic motivation can be higher when perceived challenge is appropriately matched to skill.[6] That does not prove “provoking Sukuna works.” It simply supports the basic idea that challenge can be more motivating than boring obligation.
The key is that the crayfish method is not really about humiliation. It is about leaving a choice, framing the task as mastery rather than obedience, and giving the person room to opt in.
For real students, this is not a recommendation to taunt or shame them. The educational evidence supports autonomy-supportive choices and explanations, not teacher provocation.
8. Absent after five minutes — but he comes on exam day and gets full marks
Imagine the first morning.
8:30 — Teacher: “Please sit down.”
Sukuna: “Why?”
8:31 — Teacher: “It is the rule.”
Sukuna: “I did not agree to it.”
8:32 — Teacher: “Everyone follows it.”
Sukuna: “And?”
8:33 — Teacher: “This will affect your record.”
Sukuna: “So?”
8:35 — gone.
The real problem is that he does not look like someone who would then fall behind academically. If he reads the textbook at home, appears only for the exam, and scores near perfect, the school becomes even more confused.
Monday ○
Tuesday ×
Wednesday ×
Thursday ○ — difficult lab today
Friday ×
Event-spawn student.
Not “school makes him unable to function.” More like “he does not log in when there is no interesting event.”
Within a week, the homeroom teacher learns that “Come every day” is not enough. The school has to look like a facility where something worth seeing happens every day.
Operational difficulty: special grade.
9. Final report card — academics 5, cooperation 0, teacher workload “special grade”
Final evaluation:
Academics: 5
Physical ability: 5
Instruction comprehension: 5
Understanding the expected moral answer: 5
Moral practice: 0
Cooperation: 0
Attendance: 2
Participation when interested: SSS
Homeroom teacher fatigue: Special Grade
The key is not to flatten this into “Sukuna is bad at morals,” “bad at music,” or “bad at PE.”
Moral education: he may understand the norm and simply not adopt it.
Choir: the problem is not necessarily singing; it is synchronization.
Group movement: the problem is not ability; it is accepting the group’s objective as his own.
His true weakness is therefore not a school subject. It is the assumption that school considers obvious.
10. Conclusion — Sukuna’s strongest enemy may be homeroom activity, not Gojo
The school’s requirement is simple:
“Arrive at the same time every day and do the same task, on the same cue, together with everyone else.”
Sukuna’s requirement is also simple:
“Show me something worth doing.”
Those specifications do not match at all.
If you truly wanted Sukuna to attend school, adding more rules would probably be less effective than turning every day into a boss rush. Choir, long-rope, and group projects do not hook him when presented as “cooperate for everyone.” Present them as “a high-level task that individual strength alone cannot clear,” and the crayfish claw may finally reach for the bait.
The final boss of school life is therefore not an exam.
It is this sentence:
“Today we will not choose a leader. Discuss it together and reach a decision as a group.”
Sukuna’s strongest enemy may be homeroom activity.
- Official TV Anime Jujutsu Kaisen — Character: Ryomen Sukuna: https://jujutsukaisen.jp/character/index_1st.php
- Shueisha, Jujutsu Kaisen Vol. 27: https://www.shueisha.co.jp/books/items/contents.html?jdcn=08X10000000048680300
- Shueisha, Jujutsu Kaisen Vol. 30: https://www.shueisha.co.jp/books/items/contents.html?isbn=978-4-08-884378-0&mode=1
- Human Communication Research, “Message effects on psychological reactance: meta-analyses”: https://academic.oup.com/hcr/article/52/1/38/8178818
- Wang et al. (2024), “A systematic review and meta-analysis of self-determination-theory-based interventions in the education context”: https://selfdeterminationtheory.org/wp-content/uploads/2024/06/2024_WangWangEtAl_MetaEdu.pdf
- Meng et al. (2017), “Inverted U-Shaped Curvilinear Relationship between Challenge and One's Intrinsic Motivation”: https://pmc.ncbi.nlm.nih.gov/articles/PMC5368271/
- Campos et al. (2023), “Dissociating cognitive and affective empathy across psychopathy dimensions”: https://pmc.ncbi.nlm.nih.gov/articles/PMC10345207/
