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People → Japan → Yasunari Kumekawa (粂川泰成)

People · Japan

Yasunari Kumekawa (粂川泰成)

3×3 Fewest Moves · top 1.0% of 12,418 all-time · competing since July 2022 · 2022KUME01

Yasunari Kumekawa (粂川泰成) has been competing for 4 years. His best event is the 3×3 Fewest Moves: a personal-best single of 20 moves, set at Tokyo FMC Spring 2026, puts him in the top 1.0% of the 12,418 people who have ever been ranked in the event, and 10th in Japan. Across 28 competitions since July 2022, he has put 260 official solves on the record across 15 events. Solve to solve, his 3×3 times vary about 13% around a typical one; 61% of the 36,406 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 13.97 in February 2023 to 10.31, a 26% improvement. Yasunari has entered 28 competitions, more competitions than 98% of everyone who has ever competed.

3×3 Fewest Moves
best event — top 1.0% of 12,418 all-time
20 moves
signature single · Tokyo FMC Spring 2026
260
official solves on the record
13%
solve-to-solve spread · wider than 61% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
3×3 Fewest Moves20 moves22.33
top 1.0%10 / 205
Square-16.487.59
top 1.2%5 / 251
3×310.3111.22
top 8.4%368 / 3,360
4×440.2851.12
top 12.5%130 / 679
Pyraminx5.057.14
top 13.5%162 / 691
6×62:09.812:22.28
top 15.4%51 / 209
7×73:22.073:33.10
top 17.0%46 / 188
3×3 one-handed19.0721.35
top 18.1%153 / 539
Megaminx1:14.561:25.99
top 18.4%121 / 313
3×3 blindfolded1:20.38—
top 19.7%89 / 285
5×51:23.051:28.24
top 21.7%133 / 426
Skewb6.298.89
top 28.1%152 / 354
2×25.056.71
top 40.0%490 / 1,026
Clock15.2616.15
top 48.9%173 / 268
3×3 Multi-Blind2 of 3 cubes · 14:30—
early days — 1 solve110 / 128

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

Go x Go Kyoto 2023: 13.97Hiroshima Spring 2023: 13.41Kanazawa Challenge Spring PM 2023: 10.92Otsu Biwako Autumn 2023: 12.00Shonan PM 2024: 11.34Tokai Spring 2025: 13.38Kansai Odd and BLD 2025: 10.60Kansai Mega Day 2025: 11.26Otsu Biwako Winter 2026: 10.85Katano Spring 2026: 11.58Otsu Biwako Spring 2026: 10.31Kanto Spring 2026: 12.87Japan Championship 2026: 10.67Kanto Summer 2026: 10.6810.3113.9712 Feb 202329 Aug 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-6 Square-1 single — 210 people have one; it is 0.48 away.
  • A sub-10 3×3 single — 21,606 people have one; it is 0.31 away.

Targets move as he improves.