Kaguya Shinomiya IQ

Kaguya Shinomiya's IQ is best estimated at about 135 (range 122 to 148): a near-top student and precise planner, held back by pride and a habit of overthinking tiny stakes.

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Key facts

Estimated IQ
IQ 135
Range
122 to 148
Compare with
Kiyotaka Ayanokoji, Kurisu Makise, Near and Shikamaru Nara
Confidence
Medium. A fair amount of evidence, with some gaps.
Franchise
Kaguya-sama: Love Is War. Manga (2015 to 2022) and anime (2019 to 2022)

Fan analysis by the LifeScore Editorial Team, reviewed September 2026. Contains mild spoilers. How we estimate

What is Kaguya Shinomiya's IQ?

Kaguya is the vice president of an elite academy and the runner-up to its top student, and she earns that with preparation and analytical skill. Her schemes are layered and model what the other person will do. She is not higher because she is never the one who comes out ahead of Miyuki Shirogane, and most of her elaborate plans end in stalemates. She is not lower because the school treats her as a genuine genius and the story lets her earn it. The best description is gifted, not exceptional.

Age-normed for a 16 to 17-year-old high school student.

How they score

Six ratings out of ten, each based on what is shown on the page or screen. They show how the estimate is built; they are not averaged into it.

DeductionSolving new problems from thin information
7/10
StrategyMulti-step plans that account for other minds
8/10
KnowledgeDepth and breadth of what they know
8/10
InventionBuilding or devising something genuinely new
3/10
AdaptabilityRecovering when the plan breaks
6/10
Reading peopleUnderstanding what other people want and will do
6/10

Scene-by-scene evidence

  1. Runner-up at an elite school

    Strong evidence

    Series premise, from Season 1

    Shuchiin Academy is a selective school whose top student, Miyuki Shirogane, is known across the prefecture, and Kaguya sits right behind him while also serving as student council vice president. Holding that position term after term is not luck. It demonstrates a broad, well-organised knowledge base and the discipline to keep it up under constant rivalry. It also sets the ceiling, because she cannot overtake the one person who defines the top. This is the basis of the estimate.

  2. The movie invitation standoff

    Moderate evidence

    Season 1, episode 1

    In the first episode each of them tries to get the other to be the one who asks to see a film together. Kaguya thinks through how Miyuki will read the situation, what he will assume, and how she can appear indifferent while nudging him. He runs the mirror-image plan at the same moment, so the plot stalls. It is planning around another mind, and the elaborate effort spent on something so small shows both the skill and the limits of the reasoning.

  3. The contact-info gambit

    Moderate evidence

    Season 1, episode 2

    Kaguya wants to swap contact details with Miyuki, but only if he is the one who asks. Miyuki wants exactly the same thing from her. Each builds a situation meant to make the other bring it up first, and each sidesteps the other's trap. The scene shows layered thinking and a working model of an opponent. It also shows an equal match rather than a superior one, which is why she cannot go past the top of the gifted band.

  4. Tutoring Ishigami

    Moderate evidence

    Season 1, episode 8, Ishigami Closes His Eyes

    When first-year Yu Ishigami risks failing his exams, Kaguya tutors him so he can pass. She knows the material well enough to teach it and can get results on a deadline, which tests both knowledge and organisation. It is a supporting feat rather than a headline one, and it does not show invention. But few characters in a comedy about romantic gamesmanship get a scene where the competence is simply useful.

  5. The umbrella stalemate

    Minor evidence

    Season 1, episode 5

    In the rain, Kaguya and Miyuki each try to get the other to ask to share an umbrella. Neither will say it, and each reads the other's bluffs accurately. Both characters read the situation correctly, and neither can convert the read into a win. It is a compact demonstration of sharp deduction with almost no payoff, and it explains why the estimate rests on the consistent results rather than any single scheme.

What holds the number down

  1. Never ahead of Miyuki

    Series-wide

    Kaguya is the runner-up in the rankings, and in the war of nerves that drives the story she is never clearly ahead of the president. The long contest is a draw or he wins it. She adapts, but a character who cannot get ahead of the same rival across a whole series is not at the top of any scale.

  2. Blind spots outside strategy games

    Series-wide

    Kaguya struggles with digital technology and social media and starts out naive about romance and ordinary teenage life. These are ordinary gaps, but they contrast with her reputation as an all-round genius, and they separate her from characters whose knowledge is broad in every area.

  3. The fireworks plan falls apart

    Season 1 finale, I Can't Hear the Fireworks

    Kaguya sets out to see the fireworks with Miyuki, misses the show, and it is Miyuki who has to find her afterwards. A schemer of her stated calibre would be expected to manage her own evening. The mishap is more about circumstances than mistakes of logic, but it fits a pattern of plans that are elaborate and fragile.

Why 135, and not higher or lower

Kaguya scores well on knowledge, planning and deduction, and low on invention, because everything she does happens inside a school-scale contest. Her error rate is telling: her schemes regularly fail against a rival who is only marginally ahead, and she misreads people who are not chess opponents. Fans tend to give her 160 or more because the comedy frames every scheme as a battle of geniuses. The framing is doing more work than the results. We estimate from the results, which are a strong, consistent place just behind the top.

IQ estimates for fictional characters are fan analysis: an argument from what the story shows, not a measurement. Read the full method and the standards we hold every profile to.

The debate

Fans like to rank Kaguya among the great anime strategists, alongside Lelouch and Light, because the show scores every scheme as a battle of geniuses. The comparison fails on results. Lelouch and Light run plans against opponents who can actually kill them, and Kaguya's wars are fought over who invites whom to a film. We treat the comedy as a magnifying glass. Her reasoning is high and precise, but the stakes are low, and her toughest rival is consistently a little ahead of her.

Kaguya Shinomiya IQ: frequently asked questions

What is Kaguya Shinomiya's IQ?

No IQ is given in canon. Our estimate is about 135, with a range of 122 to 148, based on her consistent position just behind the top student at an elite school, her layered schemes and her ability to teach, minus her many stalemated plans.

Is Kaguya smarter than Miyuki Shirogane?

Not by the evidence. Miyuki is the top student and Kaguya the runner-up, and the story shows him staying ahead through effort and steady results. She may be as gifted naturally, but on screen he is the one holding first place.

Is Kaguya a genius?

In the story, yes, and the evidence supports gifted. She is second at an elite school and a competent planner. The numbers that fans quote in the 160s go beyond what she shows on screen.

Are you smarter than Kaguya Shinomiya? Kaguya's IQ is about 135. What's yours?

Kaguya's number is an argument from the story. Yours can come from a real test: 25 visual reasoning questions.

Take the IQ test

25 questions · about 12 minutes

Kaguya Shinomiya and Kaguya-sama: Love Is War belong to their respective owners. LifeScore is not affiliated with them. This page is independent commentary and analysis, and estimates are our own opinion.