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People → Japan → Tatsuya Ookubo (大久保達也)

People · Japan

Tatsuya Ookubo (大久保達也)

3×3 · top 8.8% of 284,439 all-time · competing since March 2006 · 2006OOKU02

Tatsuya Ookubo (大久保達也) has been competing for 20 years. His best event is the 3×3: a personal-best single of 10.45, set at World Rubik's Cube Championship 2015, puts him in the top 8.8% of the 284,439 people who have ever been ranked in the event, and 377th in Japan. Until February 2007, no official 3×3 solve in the world had been that fast. Across 46 competitions since March 2006, he has put 1,270 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 11% around a typical one, steadier than 88% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 19.40 in March 2006 to 10.45, a 46% improvement. Tatsuya has entered 46 competitions, more competitions than 99% of everyone who has ever competed.

3×3
best event — top 8.8% of 284,439 all-time
10.45
signature single · World Rubik's Cube Championship 2015
1,270
official solves on the record
11%
solve-to-solve spread · steadier than 88% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
3×310.4512.91
top 8.8%377 / 3,329
4×439.0544.53
top 11.0%111 / 667
5×51:12.431:18.14
top 13.4%82 / 420
2×23.715.97
top 22.8%292 / 1,021
Pyraminx7.9313.80
top 35.6%360 / 688
3×3 one-handed25.9431.70
top 36.7%292 / 529
Megaminx1:44.881:59.20
top 37.5%189 / 313
6×63:02.683:18.00
top 42.3%107 / 209
3×3 blindfolded2:27.403:01.96
top 42.4%166 / 282
3×3 Fewest Moves41 moves45.33
top 51.8%135 / 201
7×75:05.955:17.58
top 52.4%108 / 188
Square-139.6347.14
top 64.9%201 / 245
Skewb12.4118.76
top 68.1%288 / 338
Clock30.4333.11
top 84.9%246 / 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

Osaka Rubik's Cube contest 2006: 19.40Tokyo Open 2006: 16.81Rubik's Cube OGU Open 2006: 15.56Japanese Championship 2006: 13.89Osaka Rubik's Cube contest 2007: 12.86Japan Open 2007: 14.27Kanazawa Open 2007: 13.90Ibaraki competition 2007: 13.15Kawasaki Open 2008: 14.34Osaka Open 2008: 12.43Japan Open 2008: 15.02Japan Open 2009: 13.78World Rubik's Cube Championship 2009: 13.15Japan Open 2010: 14.33Osaka 2011: 11.91West Japan Big Cubes 2011: 11.56Japan Open 2011: 12.80Cube Camp in Kanazawa 2011: 11.53World Rubik's Cube Championship 2011: 12.59Tsukuba 2012: 12.09Kyushu Open 2012: 11.97Kansai Open 2012: 11.72Tokai Open 2012: 11.66Kansai Star Festival 2012: 11.16Cube Camp in Kanazawa 2012: 11.55Hiroshima Open 2012: 11.80East Osaka 2012: 11.81West Japan Big Cube 2012: 13.41Kansai Open 2013: 12.75Kansai Star Festival 2013: 10.93Kyushu Open 2013: 11.96Shoe Capital Open 2014: 11.90Thailand Championship 2014: 11.06Cube Camp in Kanazawa 2014: 12.31Asian Championship 2014: 11.56Kyushu Open 2014: 12.59World Rubik's Cube Championship 2015: 10.45Cube Camp in Kanazawa 2015: 16.34JRCA Kansai Fall 2015: 16.33Kyushu Open 2015: 14.25Cube Camp in Kanazawa 2016: 15.22Kyushu Open 2016: 11.49Kyushu Open 2017: 13.00Shimonoseki 2025: 11.8810.4519.405 Mar 200628 Dec 2025

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 single — 21,172 people have one; it is 0.45 away.
  • A sub-30 4×4 single — 2,388 people have one; it is 9.05 away.

Targets move as he improves.