People · Japan
Yusuke Koakutsu (小圷悠介)
3×3 one-handed · top 0.34% of 74,621 all-time · competing since July 2023 · 2023KOAK01
Yusuke Koakutsu (小圷悠介) has been competing for 3 years. His best event is the 3×3 one-handed: a personal-best single of 8.55, set at Kanto Spring 2025, puts him in the top 0.34% of the 74,621 people who have ever been ranked in the event, and 2nd in Japan. Until May 2015, no official 3×3 one-handed solve in the world had been that fast. Across 8 competitions since July 2023, he has put 152 official solves on the record across five events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 81% of the 36,406 competitors with ten or more counted rounds. His 3×3 one-handed best has come down from 12.72 in July 2023 to 8.55, a 33% improvement. Yusuke has entered eight competitions, more competitions than 90% 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 one-handed | 8.55 | 11.04 | top 0.34% | 2 / 539 | |
| Pyraminx | 2.22 | 3.90 | top 1.5% | 20 / 691 | |
| 3×3 | 7.34 | 8.20 | top 1.8% | 78 / 3,360 | |
| 2×2 | 2.41 | 3.39 | top 8.1% | 110 / 1,026 | |
| 4×4 | 38.62 | 41.19 | top 10.6% | 112 / 679 |
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 one-handed. Faster is higher — the axis is the right way up.
The story so far
- 15 Sep 2024First sub-10 3×3: 9.84 at Tokai Open AM 2024.
- 17 Jul 2023First competition: Ayase Summer 2023. A 11.99 3×3 single to start from.
Competitions
- Tokyo Autumn 2026 · 17 Oct 2026
- Japan Championship 2026 · 18 Jul 2026
- Katano Spring 2026 · 21 Mar 2026 — 1 personal best set
- Kanto Spring 2025 · 31 May 2025 — 2 personal bests set
- Tokyo Spring PM 2025 · 20 Apr 2025 — 1 personal best set
- Shonan PM 2024 · 7 Dec 2024 — 2 personal bests set
- Tokai Open AM 2024 · 15 Sep 2024 — 2 personal bests set
- Ayase Summer 2023 · 17 Jul 2023 — 1 personal best set
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 30 rounds, finished ahead 12 times
- Kantaro Sakamoto (坂本貫太郎) — met in 26 rounds, finished ahead 11 times
- Raiden Reynolds (レイノルズ頼傳) — met in 25 rounds, finished ahead 18 times
Next targets
- A sub-8 3×3 one-handed single — 155 people have one; it is 0.55 away.
- A sub-2 Pyraminx single — 1,497 people have one; it is 0.22 away.
Targets move as he improves.