People · Brazil
Rafael Jun Kuroda
3×3 · top 6.4% of 284,439 all-time · competing since October 2025 · 2025KURO02
Rafael Jun Kuroda has been competing for 11 months. His best event is the 3×3: a personal-best single of 9.63, set at Cultura Campos do Jordão 2026, puts him in the top 6.4% of the 284,439 people who have ever been ranked in the event, and 299th in Brazil. Until November 2007, no official 3×3 solve in the world had been that fast. Across 3 competitions since October 2025, he has put 53 official solves on the record across six events. His 3×3 best has come down from 11.14 in October 2025 to 9.63, a 14% improvement. Rafael has entered three competitions, more competitions than 69% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Brazil | |
|---|---|---|---|---|---|
| 3×3 | 9.63 | 13.32 | top 6.4% | 299 / 9,644 | |
| 3×3 one-handed | 19.24 | 24.49 | top 18.5% | 263 / 1,992 | |
| 3×3 blindfolded | 1:48.30 | — | top 29.4% | 76 / 333 | |
| 2×2 | 5.09 | 6.74 | top 40.5% | 1,536 / 5,137 | |
| Pyraminx | 8.55 | 11.82 | top 41.0% | 992 / 3,208 | |
| 4×4 | 1:30.28 | 1:34.40 | top 63.8% | 989 / 1,855 |
Percentile against all competitors ever ranked in each event, a fairer measure than raw rank, because the pools differ by a factor of ten.
The line so far
Best single per competition, 3×3. Faster is higher — the axis is the right way up.
The story so far
- 15 Aug 2026First sub-10 3×3: 9.63 at Cultura Campos do Jordão 2026.
- 15 Aug 2026Three personal bests in one day at Cultura Campos do Jordão 2026.
- 4 Oct 2025First competition: II Campos do Jordão Open 2025. A 11.14 3×3 single to start from.
Competitions
- Cultura Campos do Jordão 2026 · 15 Aug 2026 — 3 personal bests set
- Guará Garage 2026 · 21 Feb 2026
- II Campos do Jordão Open 2025 · 4 Oct 2025
Reading this page: a single is one solve's time · an average is the middle three of five solves, best and worst discarded · a PB is a personal best · a DNF (did not finish) is an attempt with no valid result: a popped piece, an unsolved face, an over-limit memorisation · top X% compares against everyone ever ranked in that event, which is fairer than raw rank because event pools differ tenfold.
The circuit
The people whose scorecards keep turning up next to his.
- Leonardo Carvalho Feitosa — met in 12 rounds, finished ahead 5 times
- Lucas Ichiro Yunomae — met in 12 rounds, never finished ahead
- Fabio Bini Graciose — met in 10 rounds, finished ahead 6 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 1.63 away.
- A sub-15 3×3 one-handed single — 5,987 people have one; it is 4.24 away.
Targets move as he improves.