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People → Japan → Sota Kurosaki (黒﨑創太)

People · Japan

Sota Kurosaki (黒﨑創太)

Square-1 · top 7.1% of 25,272 all-time · competing since November 2019 · 2019KURO05

Sota Kurosaki (黒﨑創太) has been competing for 7 years. His best event is the Square-1: a personal-best single of 10.53, set at UCSD Extravaganza 2023, puts him in the top 7.1% of the 25,272 people who have ever been ranked in the event, and 23rd in Japan. Until August 2010, no official Square-1 solve in the world had been that fast. Across 14 competitions since November 2019, he has put 186 official solves on the record across five events. Solve to solve, his 3×3 times vary about 15% around a typical one; 88% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 16.47 in November 2019 to 11.10, a 33% improvement. Sota has entered 14 competitions, more competitions than 95% of everyone who has ever competed.

Square-1
best event — top 7.1% of 25,272 all-time
10.53
signature single · UCSD Extravaganza 2023
186
official solves on the record
15%
solve-to-solve spread · wider than 88% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
Square-110.5313.79
top 7.1%23 / 245
3×311.1013.35
top 10.8%468 / 3,329
Skewb4.044.70
top 11.2%57 / 338
3×3 one-handed23.2630.68
top 29.5%238 / 529
Clock12.10
early days — 3 solves129 / 263

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

Japan Championship 2019: 16.47UCSD Extravaganza 2023: 12.32San Diego Newcomers 2024: 13.62SoCal Speedcubing at Super STEM Saturday 2025: 11.54UCSD May A 2025: 11.76Berkeley September Weekday 2025: 13.21Berkeley October Weekday 2025: 12.06Cool Down Berkeley 2025: 12.21Berkeley November Weekday 2025: 12.06Berkeley January Weekday 2026: 14.16Berkeley February Weekday 2026: 12.03Berkeley Favorites 2026: 11.10Berkeley March Weekday 2026: 13.17Berkeley Pre-Cal Day 2026: 13.9411.1016.472 Nov 201917 Apr 2026

Best single per competition, 3×3. Faster is higher — the axis is the right way up.

The story so far

Competitions

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.

Next targets

  • A sub-10 Square-1 single — 1,533 people have one; it is 0.53 away.
  • A sub-10 3×3 single — 21,172 people have one; it is 1.10 away.

Targets move as he improves.