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People → Japan → Tomoaki Sakuma (佐久間智章)

People · Japan

Tomoaki Sakuma (佐久間智章)

3×3 blindfolded · top 1.5% of 12,178 all-time · competing since July 2022 · 2022SAKU01

Tomoaki Sakuma (佐久間智章) has been competing for 4 years. His best event is the 3×3 blindfolded: a personal-best single of 20.27, set at Tokyo BLD Summer 2026, puts him in the top 1.5% of the 12,178 people who have ever been ranked in the event, and 6th in Japan. Until November 2016, no official 3×3 blindfolded solve in the world had been that fast. Across 25 competitions since July 2022, he has put 154 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 57% of the 35,811 competitors with ten or more counted rounds. His 3×3 blindfolded best has come down from 1:38.89 in July 2022 to 20.27, an 80% improvement. Tomoaki has entered 25 competitions, more competitions than 98% of everyone who has ever competed.

3×3 blindfolded
best event — top 1.5% of 12,178 all-time
20.27
signature single · Tokyo BLD Summer 2026
154
official solves on the record
13%
solve-to-solve spread · steadier than 57% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
3×3 blindfolded20.2724.92
top 1.5%6 / 282
3×39.6512.21
top 6.5%282 / 3,329
3×3 Multi-Blind13 of 16 cubes · 53:00—
top 16.8%26 / 128
4×41:06.441:15.32
top 43.4%405 / 667
4×4 blindfolded8:33.67—
early days — 3 solves31 / 81
Pyraminx13.0314.10
top 73.1%572 / 688
3×3 Fewest Moves53 moves—
early days — 1 solve187 / 201

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

Ota Blind Summer 2022: 1:38.89Ayase Autumn A 2022: 1:06.30Hiroshima Spring 2023: 44.85Tokyo Challenge BLD I 2023: 43.06Ota Blind Summer 2023: 1:18.65Tokai Open 2023: 36.39Ota Blind New Year 2024: 28.73Kanazawa 2024: 41.03Tokyo Spring AM 2025: 26.10Tokyo BLD Spring 2025: 31.05Kansai Odd and BLD 2025: 22.63Kanto Autumn AM 2025: 26.85Ota BLD Autumn 2025: 23.55Kanto Winter 2026: 24.43Tokyo BLD Spring 2026: 22.35Japan Championship 2026: 23.23Tokyo BLD Summer 2026: 20.2720.271:38.8930 Jul 202225 Jul 2026

Best single per competition, 3×3 blindfolded. 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-20 3×3 blindfolded single — 166 people have one; it is 0.27 away.
  • A sub-8 3×3 single — 7,931 people have one; it is 1.65 away.

Targets move as he improves.