People · Japan
Rio Esaki (江碕莉旺)
Skewb · top 0.61% of 74,164 all-time · competing since March 2024 · 2024ESAK01
Rio Esaki (江碕莉旺) has been competing for 3 years. His best event is the Skewb: a personal-best single of 1.62, set at Tokai Spring 2025, puts him in the top 0.61% of the 74,164 people who have ever been ranked in the event, and 3rd in Japan. Until October 2015, no official Skewb solve in the world had been that fast. Across 13 competitions since March 2024, he has put 281 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 14% around a typical one; 67% of the 36,406 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 10.58 in March 2024 to 8.32, a 21% improvement. Rio has entered 13 competitions, more competitions than 94% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| Skewb | 1.62 | 2.13 | top 0.61% | 3 / 354 | |
| 4×4 | 28.59 | 31.91 | top 2.1% | 22 / 679 | |
| 5×5 | 52.41 | 1:00.59 | top 2.5% | 21 / 426 | |
| 3×3 | 8.32 | 9.01 | top 3.4% | 143 / 3,360 | |
| Pyraminx | 2.97 | 5.09 | top 3.5% | 52 / 691 | |
| Clock | 5.65 | 7.89 | top 6.1% | 23 / 268 | |
| 3×3 one-handed | 14.35 | 17.02 | top 6.9% | 70 / 539 | |
| 6×6 | 2:00.94 | 2:09.60 | top 11.4% | 37 / 209 | |
| Megaminx | 1:03.28 | 1:21.39 | top 11.7% | 85 / 313 | |
| Square-1 | 17.22 | 19.45 | top 21.5% | 84 / 251 | |
| 7×7 | 3:37.19 | 3:42.08 | early days — 3 solves | 57 / 188 |
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
- 18 Jul 2026Three personal bests in one day at Japan Championship 2026.
- 21 Mar 2026Three personal bests in one day at Katano Spring 2026.
- 15 Sep 2024First sub-10 3×3: 9.30 at Tokai Open AM 2024.
- 31 Mar 2024First competition: Tokai Challenge Beta 2024. A 10.58 3×3 single to start from.
Competitions
- Tokai Autumn 2026 · 11 Oct 2026 — 2 personal bests set
- Japan Championship 2026 · 18 Jul 2026 — 3 personal bests set
- Otsu Biwako Spring 2026 · 11 Apr 2026
- Katano Spring 2026 · 21 Mar 2026 — 3 personal bests set
- Kanto Winter 2026 · 21 Feb 2026 — 2 personal bests set
- Tokai Big Cubes 2025 · 14 Dec 2025 — 2 personal bests set
- Tokai Summer 2025 · 27 Jul 2025 — 1 personal best set
- Tokai Spring 2025 · 12 Apr 2025 — 2 personal bests set
- Ota Spring 2025 · 20 Mar 2025 — 1 personal best set
- Tokai Open AM 2024 · 15 Sep 2024 — 1 personal best set
- Katano Milky Way 2024 · 7 Jul 2024 — 1 personal best set
- Kanazawa 2024 · 25 May 2024 — 1 personal best set
- Tokai Challenge Beta 2024 · 31 Mar 2024
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.
- Kantaro Sakamoto (坂本貫太郎) — met in 53 rounds, finished ahead 24 times
- Takumi Kato (加藤匠) — met in 47 rounds, finished ahead 26 times
- Haruki Tsutsui (筒井遥規) — met in 44 rounds, finished ahead 17 times
Next targets
- A sub-1 Skewb single — 35 people have one; it is 0.62 away.
- A sub-25 4×4 single — 614 people have one; it is 3.59 away.
Targets move as he improves.