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People → Japan → Takuma Shirahase (白波瀬拓磨)

People · Japan

Takuma Shirahase (白波瀬拓磨)

3×3 · top 4.7% of 284,439 all-time · competing since July 2007 · 2007SHIR01

Takuma Shirahase (白波瀬拓磨) has been competing for 19 years. His best event is the 3×3: a personal-best single of 8.91, set at Japan Open 2012, puts him in the top 4.7% of the 284,439 people who have ever been ranked in the event, and 191st in Japan. Until May 2008, no official 3×3 solve in the world had been that fast. Across 147 competitions since July 2007, he has put 2,166 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 13% around a typical one; 53% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 31.91 in July 2007 to 8.91, a 72% improvement. Takuma has entered 147 competitions, more competitions than 99% of everyone who has ever competed.

3×3
best event — top 4.7% of 284,439 all-time
8.91
signature single · Japan Open 2012
2,166
official solves on the record
13%
solve-to-solve spread · wider than 53% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
3×38.9112.40
top 4.7%191 / 3,329
3×3 blindfolded40.0153.82
top 6.8%34 / 282
Pyraminx3.835.99
top 6.9%85 / 688
2×22.303.86
top 7.0%95 / 1,021
Clock7.879.90
top 14.6%53 / 263
3×3 Multi-Blind9 of 9 cubes · 51:47—
top 19.7%30 / 128
4×446.8351.27
top 20.6%208 / 667
3×3 one-handed20.0625.86
top 20.6%173 / 529
4×4 blindfolded4:53.908:08.98
top 21.3%19 / 81
3×3 Fewest Moves33 moves40.67
top 23.4%76 / 201
5×5 blindfolded11:40.0029:25.00
top 27.2%17 / 50
5×51:34.471:44.94
top 31.1%183 / 420
Megaminx1:38.601:48.80
top 33.7%177 / 313
Skewb8.2511.04
top 43.2%204 / 338
6×63:31.033:38.07
top 55.1%134 / 209
7×75:33.125:49.07
top 60.6%123 / 188
Square-138.2845.52
top 63.2%196 / 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

Japan Open 2007: 31.91Osaka Open 2008: 17.65Japan Open 2008: 15.44JRCA Kanto Summer 2009: 16.30Japan Open 2009: 15.44Toyama Open 2009: 16.40JRCA Kanto Winter 2010: 15.05Japan Open 2010: 14.65JRCA Kansai Spring 2010: 13.46Kawasaki Open 2010: 14.8830th Anniversary MegaHouse Cup 2010: 12.81Cube Camp in Kanazawa 2010: 13.31JRCA Kansai Summer 2010: 13.71Matsudo Open 2010: 14.91UT Open 2010: 14.88Ishikawa Gokoku Shinto Shrine Open 2010: 12.41Kansai New Year 2011: 14.83Osaka 2011: 12.71Matsudo Spring 2011: 9.68Japan Open 2011: 11.78Cube Camp in Kanazawa 2011: 16.71UT Open 2011: 13.86Hokuriku Eve 2011: 11.15Kansai New Year 2012: 11.61Kyushu Open 2012: 13.13Tokai Open 2012: 10.90Kyotanabe Open 2012: 12.38Kawasaki Open 2012: 13.13Kanto Open 2012: 11.94Hiroshima Open 2012: 12.66Japan Open 2012: 8.91East Osaka 2012: 12.58UT Open 2012: 13.30Kanto Winter 2012: 12.11Rabbit And Turtle 2013: 11.13Japan Contest Spring 2013: 13.58Kawasaki Open 2013: 12.86Japan Open 2013: 11.00Tachikawa 3x3 Fest 2013: 12.77Kawasaki Autumn 2013: 12.83UT Open 2013: 14.13Kanto Open 2014: 12.88Japan Contest Spring 2014: 10.97Japan Contest Autumn 2014: 9.47Asian Championship 2014: 11.55UT Open 2014: 11.66Tokai Open 2014: 12.43Tachikawa 3x3 Fest 2014: 12.58Tokyo Pyraminx Open 2015: 14.25Japan Open 2015: 11.91Japan Open 2016: 13.13Yokohama 2017: 13.40Japan Open 2017: 12.24Cube Camp in Kanazawa 2018: 14.52Japan Championship 2018: 12.71Tribox Open Spring 2019: 16.66Cube Camp in Kanazawa 2019: 12.92Japan Championship 2019: 12.09Taiwan Championship 2019: 11.63Hiroshima Open 2019: 11.60Ayase 2020: 12.61Kanazawa Open 2020: 11.39Vladivostok Spring 2020: 9.56Welcome Back Ayase Winter 2020: 13.93Tokai Winter AM 2021: 13.28Minatomirai 2022: 11.22Yoga Summer A 2022: 12.77Ayase Autumn A 2022: 12.40Taiwan Championship 2022: 11.56Tokyo Challenge Winter C 2023: 13.27Kanazawa Challenge Spring AM 2023: 13.92Ayase Summer 2023: 12.42Rubik's WCA World Championship 2023: 12.87Tokai Open 2023: 12.19Taiwan Championship 2023: 12.12Taiwan Championship 2024: 13.67Tokai Spring 2025: 13.45Tokyo Spring AM 2025: 12.84Kanto Spring 2025: 11.07Kansai Odd and BLD 2025: 12.98Taipei Summer Open 2025: 13.02Tokyo Summer 2025: 11.83Kanto Summer AM 2025: 13.26Kanto Autumn AM 2025: 10.78Tokyo Winter 2025: 12.99Shimonoseki 2025: 12.13Ota Winter 2026: 11.85Kanto Winter 2026: 11.48GANCUBE Puzzles in Pi Day Pampanga 2026: 9.60Tokyo Spring 2026: 12.50Japan Championship 2026: 11.66Kansai Mega Day 2026: 12.85Shimonoseki Summer 2026: 12.90Kanto Summer 2026: 14.278.9131.9128 Jul 200729 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-8 3×3 single — 7,931 people have one; it is 0.91 away.
  • A sub-40 3×3 blindfolded single — 826 people have one; it is 0.01 away.

Targets move as he improves.