People · Japan
Keisuke Okubo (大久保圭介)
3×3 · top 2.6% of 284,439 all-time · competing since September 2023 · 2023OKUB01
Keisuke Okubo (大久保圭介) has been competing for 3 years. His best event is the 3×3: a personal-best single of 7.90, set at Katano Milky Way 2024, puts him in the top 2.6% of the 284,439 people who have ever been ranked in the event, and 110th in Japan. Until July 2008, no official 3×3 solve in the world had been that fast. Across 4 competitions since September 2023, he has put 46 official solves on the record across six events. His 3×3 best has come down from 10.89 in September 2023 to 7.90, a 27% improvement. Keisuke has entered four competitions, more competitions than 78% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| 3×3 | 7.90 | 10.39 | top 2.6% | 110 / 3,329 | |
| 4×4 | 38.34 | 43.63 | top 10.1% | 99 / 667 | |
| Square-1 | 15.51 | 19.53 | top 17.5% | 68 / 245 | |
| Clock | 10.11 | 14.42 | top 25.6% | 89 / 263 | |
| 3×3 blindfolded | 1:38.86 | — | early days — 2 solves | 118 / 282 | |
| 3×3 one-handed | 30.49 | 34.40 | top 47.7% | 358 / 529 |
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
- 25 May 2024First sub-10 3×3: 8.57 at Kanazawa 2024.
- 23 Sep 2023First competition: Otsu Biwako Autumn 2023. A 10.89 3×3 single to start from.
Competitions
- Katano Milky Way 2024 · 7 Jul 2024 — 2 personal bests set
- Kanazawa 2024 · 25 May 2024 — 1 personal best set
- Ota Blind New Year 2024 · 20 Jan 2024
- Otsu Biwako Autumn 2023 · 23 Sep 2023
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.
- Takumi Kato (加藤匠) — met in 12 rounds, finished ahead 5 times
- Takayuki Tanaka (田中隆喜) — met in 12 rounds, finished ahead 4 times
- Tomohiro Kobayashi (小林知広) — met in 11 rounds, finished ahead once
Next targets
- A sub-6 3×3 single — 1,376 people have one; it is 1.90 away.
- A sub-30 4×4 single — 2,388 people have one; it is 8.34 away.
Targets move as he improves.