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People → Japan → Kengo Yamawaki (山脇憲吾)

People · Japan

Kengo Yamawaki (山脇憲吾)

Square-1 · top 13.3% of 25,272 all-time · competing since May 2012 · 2012YAMA01

Kengo Yamawaki (山脇憲吾) has been competing for 14 years. His best event is the Square-1: a personal-best single of 13.62, set at Japan Championship 2019, puts him in the top 13.3% of the 25,272 people who have ever been ranked in the event, and 56th in Japan. Across 97 competitions since May 2012, he has put 1,384 official solves on the record across 13 events. Solve to solve, his 3×3 times vary about 14% around a typical one; 76% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 19.91 in May 2012 to 12.70, a 36% improvement. Kengo has entered 97 competitions, more competitions than 99% of everyone who has ever competed.

Square-1
best event — top 13.3% of 25,272 all-time
13.62
signature single · Japan Championship 2019
1,384
official solves on the record
14%
solve-to-solve spread · wider than 76% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingJapan
Square-113.6218.96
top 13.3%56 / 245
Pyraminx5.199.60
top 14.4%166 / 688
3×312.7013.85
top 16.4%691 / 3,329
4×446.4557.12
top 20.1%205 / 667
2×25.096.98
top 40.5%500 / 1,021
3×3 one-handed27.8332.11
top 41.5%321 / 529
5×52:12.882:22.21
top 57.0%294 / 420
3×3 blindfolded4:07.72—
early days — 2 solves233 / 282
Skewb14.1521.22
top 75.3%312 / 338
6×65:06.965:35.63
top 82.8%185 / 209
Megaminx3:44.974:10.09
top 87.1%301 / 313
7×78:05.658:28.17
top 89.0%169 / 188
3×3 Fewest Moves56 moves—
early days — 1 solve194 / 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

Kyotanabe Open 2012: 19.91Kansai Star Festival 2012: 16.31Cube Camp in Kanazawa 2012: 21.00Japan Open 2012: 17.34East Osaka 2012: 14.80West Japan Big Cube 2012: 14.90Kansai Open 2013: 15.30Japan Open 2013: 14.43Lake-Biwa Open 2013: 17.90East Osaka 2013: 16.27West Japan Big Cube 2013: 17.16JRCA Kansai Winter 2014: 15.84Kansai Open 2014: 14.93JRCA Kansai Spring 2014: 15.55JRCA Kansai Summer 2014: 14.91Cube Camp in Kanazawa 2014: 13.93West Japan Big Cube 2014: 14.52Asian Championship 2014: 15.08JRCA Kansai Fall 2014: 15.65Tokai Open 2014: 14.53JRCA Kansai Winter 2015: 15.34Kansai Open 2015: 14.34JRCA Kansai Spring 2015: 15.40JRCA Kansai Summer 2015: 13.93Cube Camp in Kanazawa 2015: 13.91Japan Open 2015: 15.58JRCA Kansai Fall 2015: 15.21Kyushu Open 2015: 14.75JRCA Kansai Winter 2016: 14.38Kansai Open 2016: 13.15Kawasaki Spring 2016: 14.78JRCA Kansai Spring 2016: 15.90JRCA Kansai Summer 2016: 14.50Cube Camp in Kanazawa 2016: 14.84JRCA Kansai Fall 2016: 13.55Japan Open 2016: 16.69Kansai Small Cubes 2016: 14.16Kyushu Open 2016: 15.42JRCA Kansai Winter 2017: 14.22Kansai Open 2017: 13.60JRCA Kansai Spring 2017: 12.70Kansai Summer 2017: 16.44Cube Camp in Kanazawa 2017: 16.59Kansai Fall 2017: 15.83Kansai Big Cube 2017: 13.22Japan Open 2017: 13.17Kyushu Open 2017: 14.56Kobe Open 2018: 13.90Kansai Open 2018: 14.54Tribox Open Spring 2018: 14.80Kyoto Open 2018: 14.82Kansai Summer 2018: 14.28Cube Camp in Kanazawa 2018: 13.70WCA Asian Championship 2018: 14.50Tokyo Pyraminx Returns 2018: 14.53Hiroshima 2018: 15.05Kansai Big Cube 2018: 13.61Saitama 2018: 14.55Japan Championship 2018: 15.01Ayase 2019: 14.40Kansai Open 2019: 15.14Tribox Open Spring 2019: 15.07Tokai Open 2019: 14.14WCA World Championship 2019: 14.55Nishinomiya Open 2019: 13.54Cube Camp in Kanazawa 2019: 14.53Kansai Summer 2019: 14.40Kyoto Open 2019: 13.87Japan Championship 2019: 15.22Hiroshima Open 2019: 12.96Ayase 2020: 13.78Kanazawa Open 2020: 13.40Welcome Back Ayase Winter 2020: 14.67Tokai Winter PM 2021: 13.95Minatomirai 2022: 13.86Ota Summer 2022: 13.39Yoga Summer A 2022: 16.60Ayase Autumn A 2022: 13.83Go x Go Kyoto 2023: 16.51Hiroshima Spring 2023: 15.53Ayase Summer 2023: 16.57Rubik's WCA World Championship 2023: 14.92Tokai Open 2023: 13.43Otsu Biwako Autumn 2023: 16.86Tokyo Challenge VI 2023: 14.67Hiroshima Winter 2024: 15.17Katano Milky Way 2024: 15.61Tokai Open PM 2024: 15.45Rubik's WCA Asian Championship 2024: 17.02Tokyo Open AM Winter 2025: 19.50Kanto Spring 2025: 16.15Kanto Summer AM 2025: 12.94Katano Summer 2025: 13.70Kanto Autumn AM 2025: 13.8412.7021.0026 May 201211 Oct 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-12 Square-1 single — 2,502 people have one; it is 1.62 away.
  • A sub-5 Pyraminx single — 17,019 people have one; it is 0.19 away.

Targets move as he improves.