The year with no perfect paper
The 58th olympiad produced an outcome the competition sees only occasionally: no 42s at all. The maximum available was six problems at seven points each, and the best anyone managed was 35. Takaya was one of three contestants to reach it, alongside Amirmojtaba Sabour of Iran and Hoang Huu Quoc Huy of Vietnam.
All three arrived there by the same route. The official rows are identical: 7, 7, 0, 7, 7, 7. Five complete solutions and a zero on the problem set in the hardest position on the first paper. In 2017 the leaderboard was not sorted by who scored most on the decisive question; it was sorted by who had been flawless on everything else.
Japan in Rio
Japan's results in 2017 show Takaya well ahead of his teammates. He took 35 and rank one; Naoki Kuroda scored 25 for gold at rank thirty-six, exactly on that year's gold cut-off; Soji Kubota took 22 and Shuho Kanda 19, both silver.
A ten-point gap between a team's first and second contestant is a sizeable one at this level, where the difference between consecutive ranks is often a single mark of partial credit. It puts Takaya's result in its national context: he was not the strongest of a uniformly strong squad but the outlier at the top of it.
Japan before and after
The official tables make Japan's continuity at the top of the competition visible across a decade. Takaya shared first in the world in 2017. In 2023 Japan hosted the olympiad itself, in Chiba. In 2025 Satoshi Kano was one of five contestants to score a perfect 42. In 2026 Shinjiro Hamakawa took gold at joint fourteenth with 36 points.
Those are different contestants facing different problem sets, which is what makes the pattern worth noting. A single first place can be a cohort's good year. A record of high finishes across nearly a decade describes a selection and training pipeline that keeps producing them.
What the table records — and what it does not
The firm facts are the organisers' own and require no corroboration: the country, the six problem scores, the total of 35, the shared rank of one, the gold medal, the year and the host city. Everything on this page's fact list comes from that single authoritative row.
The row is also all there is. It carries no age, no date of birth, no school, no city and no photograph. Nothing in the sources gathered here records how Takaya qualified for the Japanese team, what he studied afterwards, or whether he competed again. Those absences are set out rather than filled in.
Vingt questions, huit minutes au chronomètre et un centile mesuré face à tous ceux qui l’ont passé. Sans inscription.
Passer le test de QI →What a zero on the hardest problem means
Olympiad marking is unusually unforgiving at the extremes. A seven means a complete and correct argument; a zero on a problem of that difficulty usually means the contestant did not find the key idea at all, rather than that the work was careless. Three of the strongest young mathematicians in the world producing the same zero says more about the problem than about them.
It also explains why the 2017 result is quoted the way it is. In a year with several perfect scores, joint first place means sharing a ceiling. In 2017 it meant reaching a ceiling that the organisers had set above everyone's head, and getting closer to it than 612 other contestants managed.
| Personne | Pays | Étape | Âge / Donnée |
|---|---|---|---|
| Yuta Takaya | Japon | Cinq solutions parfaites, une page blanche et une première place mondiale partagée | — |
| Junghun Ju | Corée du Sud | Un score parfait à l'Olympiade internationale de mathématiques | — |
| Amber Li | Australie | Trois médailles d'or consécutives à l'EGMO | — |
| Aida Mitroi | Roumanie | Trois médailles d'or consécutives à l'EGMO | — |
| Alisa Volkova | Russie | Elle a résolu cinq des six problèmes et a terminé douzième mondiale | — |
What is documented — and what is not
✓ Documented
- 35 points of 42 at the 58th IMO in 2017, joint 1st, gold medal (official IMO results)
- Per-problem scores of 7, 7, 0, 7, 7, 7
- Top scorer on the Japanese team; no perfect score was recorded in 2017
? Unverified, disputed or wrong
- No age, birth year, school or city in these sources
- No record of how he qualified or of any later olympiad appearance
- No published information about what he has done since 2017
Questions people ask about Yuta Takaya
What did Yuta Takaya achieve?
He shared first place in the world at the 2017 International Mathematical Olympiad in Rio de Janeiro, scoring 35 out of 42 and taking gold.
Who did he share first place with?
Amirmojtaba Sabour of Iran and Hoang Huu Quoc Huy of Vietnam. All three had the same score sheet: 7, 7, 0, 7, 7, 7.
Why was 35 the winning score?
Nobody in the field of 615 solved problem three, so no perfect paper was produced. The leaders scored seven on each of the other five problems.
How old is Yuta Takaya?
No source in this record gives his age or birth year. The IMO results table publishes names, countries, scores, ranks and medals only.
How did Japan do in 2017?
Takaya took gold with 35, Naoki Kuroda gold with 25, and Soji Kubota and Shuho Kanda silver with 22 and 19.
Has Japan done well since?
Yes. Japan hosted the olympiad in Chiba in 2023, Satoshi Kano scored a perfect 42 in 2025, and Shinjiro Hamakawa took gold in 2026.
Is Yuta Takaya on Wikipedia?
No Wikipedia article was found for him. The source used here is the official IMO results table.
Where is Yuta Takaya now?
No source in this record says. The documented trail is his row in the 2017 results.
Quick quiz: how well do you know Takaya’s story?
How many points did Yuta Takaya score at IMO 2017?
Which country was he representing?
How many contestants scored a perfect paper in 2017?
Sources
- IMO 2017 individual results — International Mathematical Olympiad, 2017
- IMO 2023 individual results — International Mathematical Olympiad, 2023
- IMO 2025 individual results — International Mathematical Olympiad, 2025
- IMO 2026 individual results — International Mathematical Olympiad, 2026
Checked by the Geniuses.club editorial team. Ages are given as of September 2026.
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