People · Japan
Shu Kurashima
Pyraminx · top 25.9% of 129,321 all-time · competing since January 2025 · 2025KURA01
Shu Kurashima has been competing for a year. His best event is the Pyraminx: a personal-best single of 6.76, set at Katano Summer 2025, puts him in the top 25.9% of the 129,321 people who have ever been ranked in the event, and 276th in Japan. Across 7 competitions since January 2025, he has put 91 official solves on the record across six events. Solve to solve, his 3×3 times vary about 12% around a typical one, an early reading from 8 counted rounds. That figure sets aside his 3 DNFs. His 3×3 best has come down from 32.37 in January 2025 to 18.16, a 44% improvement. Shu has entered seven competitions, more competitions than 88% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| Pyraminx | 6.76 | 11.12 | top 25.9% | 276 / 688 | |
| 2×2 | 4.32 | 6.52 | top 30.6% | 388 / 1,021 | |
| 3×3 | 18.16 | 21.50 | top 34.6% | 1,344 / 3,329 | |
| Clock | 13.24 | — | top 40.7% | 145 / 263 | |
| Skewb | 9.90 | 14.87 | top 54.3% | 241 / 338 | |
| 3×3 one-handed | 53.04 | 59.66 | top 79.4% | 474 / 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
- 19 Apr 2025First sub-20 3×3: 18.38 at UIUC Side Events Spring 2025.
- 1 Mar 2025First sub-30 3×3: 24.10 at Racing Kane 2025.
- 25 Jan 2025First competition: Unorthodox Blocks Wisconsin 2025. A 32.37 3×3 single to start from.
Competitions
- Kansai Mega Day 2025 · 2 Nov 2025
- Katano Summer 2025 · 15 Sep 2025 — 2 personal bests set
- UIUC Side Events Spring 2025 · 19 Apr 2025 — 2 personal bests set
- Midwest Cubing Classic 2025 · 6 Apr 2025 — 2 personal bests set
- IlliNxNois Spring 2025 · 23 Mar 2025 — 2 personal bests set
- Racing Kane 2025 · 1 Mar 2025 — 1 personal best set
- Unorthodox Blocks Wisconsin 2025 · 25 Jan 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.
- Sebastian Carrillo — met in 14 rounds, never finished ahead
- Tommy Stady — met in 13 rounds, finished ahead twice
- Akshaansh Chilakapati — met in 12 rounds, never finished ahead
Next targets
- A sub-6 Pyraminx single — 25,870 people have one; it is 0.76 away.
- A sub-4 2×2 single — 49,452 people have one; it is 0.32 away.
Targets move as he improves.