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People → Japan → Kai Yamamoto (山本快)

People · Japan

Kai Yamamoto (山本快)

3×3 Fewest Moves · top 0.44% of 12,418 all-time · competing since December 2021 · 2021YAMA01

Kai Yamamoto (山本快) has been competing for 5 years. His best event is the 3×3 Fewest Moves: a personal-best single of 19 moves, set at FMC World 2026, puts him in the top 0.44% of the 12,418 people who have ever been ranked in the event, and 4th in Japan. Across 40 competitions since December 2021, he has put 637 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 73% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 11.30 in December 2021 to 8.62, a 24% improvement. Kai has entered 40 competitions, more competitions than 99% of everyone who has ever competed.

3×3 Fewest Moves
best event — top 0.44% of 12,418 all-time
19 moves
signature single · FMC World 2026
637
official solves on the record
12%
solve-to-solve spread · steadier than 73% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
3×3 Fewest Moves19 moves21.33
top 0.44%4 / 205
3×3 one-handed10.7013.05
top 1.6%16 / 539
Pyraminx2.285.06
top 1.7%25 / 691
Clock3.805.04
top 2.0%7 / 268
4×429.7736.27
top 2.8%36 / 679
3×38.629.77
top 4.0%172 / 3,360
2×21.972.55
top 4.6%58 / 1,026
5×558.581:07.32
top 4.9%39 / 426
Megaminx51.4754.07
top 5.8%40 / 313
3×3 blindfolded41.2859.65
top 7.2%37 / 285
Skewb3.636.65
top 8.6%48 / 354
Square-111.3516.33
top 8.6%31 / 251
6×61:54.492:02.59
top 8.9%29 / 209
3×3 Multi-Blind14 of 14 cubes · 51:40—
top 9.2%13 / 128
7×73:12.763:20.42
top 14.2%37 / 188
4×4 blindfolded4:21.225:17.37
top 17.1%15 / 81
5×5 blindfolded10:26.00—
top 23.2%15 / 50

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

Tokai Winter PM 2021: 11.30Minatomirai 2022: 10.89Ayase Autumn B 2022: 10.60Tokyo Challenge Winter C 2023: 10.43Hiroshima Spring 2023: 8.62Ayase Summer 2023: 11.13Rubik's WCA World Championship 2023: 10.01Otsu Biwako Autumn 2023: 10.74Tokyo Challenge VIII 2023: 9.67Kanazawa 2024: 9.94Tokai Open AM 2024: 8.92Shonan AM 2024: 8.76Tokai Spring 2025: 8.99Kanto Spring 2025: 9.21Kanto Winter 2026: 10.58Katano Spring 2026: 9.92Tokyo Spring 2026: 10.15Otsu Biwako Spring 2026: 9.84Kanto Spring 2026: 10.77Japan Championship 2026: 9.38Kanto Summer 2026: 9.89Tokyo Autumn 2026: 10.858.6211.3011 Dec 202117 Oct 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 3×3 one-handed single — 800 people have one; it is 0.70 away.
  • A sub-2 Pyraminx single — 1,497 people have one; it is 0.28 away.

Targets move as he improves.