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People → Japan → Yu Sajima (佐島優)

People · Japan

Yu Sajima (佐島優)

4×4 · top 0.7% of 83,917 all-time · competing since March 2008 · 2008SAJI01

Yu Sajima (佐島優) has been competing for 18 years. His best event is the 4×4: a personal-best single of 24.97, set at Kanazawa Open 2020, puts him in the top 0.7% of the 83,917 people who have ever been ranked in the event, and 7th in Japan. Until January 2014, no official 4×4 solve in the world had been that fast. Across 74 competitions since March 2008, he has put 2,795 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 64% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 11.84 in March 2008 to 6.90, a 42% improvement. Yu has entered 74 competitions, more competitions than 99% of everyone who has ever competed.

4×4
best event — top 0.7% of 83,917 all-time
24.97
signature single · Kanazawa Open 2020
2,795
official solves on the record
12%
solve-to-solve spread · steadier than 64% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
4×424.9728.92
top 0.7%7 / 667
3×36.908.46
top 1.2%54 / 3,329
5×548.5857.98
top 1.4%13 / 420
6×61:40.961:50.33
top 4.4%14 / 209
7×72:34.922:39.52
top 4.6%11 / 188
3×3 one-handed14.0517.57
top 6.2%64 / 529
Clock6.167.53
top 7.8%31 / 263
2×22.413.33
top 8.0%110 / 1,021
Megaminx57.831:05.51
top 8.9%68 / 313
3×3 Fewest Moves30 moves35.33
top 14.8%63 / 201
Pyraminx5.306.00
top 15.1%176 / 688
3×3 blindfolded1:46.56—
top 28.8%129 / 282
Skewb7.4411.17
top 37.0%182 / 338
Square-130.8839.96
top 51.0%156 / 245

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 Open 2008: 11.84Osaka Open 2009: 10.93JRCA Hokuriku 2009: 11.63JRCA Kanto Winter 2010: 10.58Japan Open 2010: 9.86Kawasaki Open 2010: 9.1330th Anniversary MegaHouse Cup 2010: 8.97Cube Camp in Kanazawa 2010: 10.81Matsudo Open 2010: 9.30UT Open 2010: 9.90Osaka 2011: 9.27Matsudo Spring 2011: 8.69Japan Open 2011: 9.22Cube Camp in Kanazawa 2011: 8.46World Rubik's Cube Championship 2011: 9.22Matsudo Autumn 2011: 7.87UT Open 2011: 8.36Hokuriku Eve 2011: 9.09Tsukuba 2012: 8.55Kansai Open 2012: 8.75Matsudo Spring 2012: 8.63Tokai Open 2012: 8.55Rabbit and Turtle 2012: 7.68Kawasaki Open 2012: 8.19Kansai Star Festival 2012: 8.77Kanto Open 2012: 7.53Cube Camp in Kanazawa 2012: 9.08Japan Open 2012: 9.06Asian Championship 2012: 7.47UT Open 2012: 8.13Kanto Winter 2012: 8.84Hokuriku Eve Open 2012: 9.44Rabbit And Turtle 2013: 8.78Kansai Open 2013: 7.72Japan Contest Spring 2013: 8.72Kawasaki Open 2013: 7.68Japan Open 2013: 8.03Lake-Biwa Open 2013: 9.02World Rubik's Cube Championship 2013: 9.56Tachikawa 3x3 Fest 2013: 9.83Cube Camp in Kanazawa 2013: 9.53Kansai Open 2014: 9.15Japan Contest Spring 2014: 8.31Japan Contest Autumn 2014: 7.94Asian Championship 2014: 9.30UT Open 2014: 8.19All is Well 2015: 8.50Kansai Open 2015: 8.43Cube Camp in Kanazawa 2015: 9.15Japan Open 2015: 8.08Cherry Blossom Viewing 2016: 7.84Cube Camp in Kanazawa 2016: 8.47Japan Open 2016: 8.56Kyushu Open 2016: 8.06Tohoku Open 2017: 8.09World Rubik's Cube Championship 2017: 8.23Cube Camp in Kanazawa 2017: 6.97Japan Open 2017: 8.48Kansai Open 2018: 7.31Cube Camp in Kanazawa 2018: 7.88WCA Asian Championship 2018: 8.44Japan Championship 2018: 8.32Kansai Open 2019: 8.46WCA World Championship 2019: 8.43Nishinomiya Open 2019: 8.36Cube Camp in Kanazawa 2019: 7.82Tohoku 2019: 7.00Kyoto Open 2019: 7.76Japan Championship 2019: 8.22Kanazawa Open 2020: 7.81Kanazawa Challenge Spring AM 2023: 7.30Kanazawa 2024: 6.906.9011.8429 Mar 200825 May 2024

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-20 4×4 single — 42 people have one; it is 4.97 away.
  • A sub-6 3×3 single — 1,376 people have one; it is 0.90 away.

Targets move as he improves.