People · Japan

Shu Kasuga (春日柊)

3×3 · top 5.7% of 284,439 all-time · competing since July 2010 · 2010KASU01

Shu Kasuga (春日柊) has been competing for 16 years. His best event is the 3×3: a personal-best single of 9.33, set at Kawasaki Spring 2016, puts him in the top 5.7% of the 284,439 people who have ever been ranked in the event, and 237th in Japan. Until February 2008, no official 3×3 solve in the world had been that fast. Across 17 competitions since July 2010, he has put 420 official solves on the record across 14 events. Solve to solve, his 3×3 times vary about 14% around a typical one; 65% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 31.13 in July 2010 to 9.33, a 70% improvement. Shu has entered 17 competitions, more competitions than 96% of everyone who has ever competed.

3×3

best event — top 5.7% of 284,439 all-time

9.33

signature single · Kawasaki Spring 2016

420

official solves on the record

14%

solve-to-solve spread · wider than 65% of the field

Standing, event by event

vs everyone ever ranked

Event	PB single	PB average		Japan
3×3	9.33	12.70	top 5.7%	237 / 3,329
2×2	2.47	4.18	top 8.6%	119 / 1,021
3×3 one-handed	15.55	19.38	top 9.2%	89 / 529
Pyraminx	6.28	8.11	top 22.1%	233 / 688
4×4	48.38	58.54	top 22.6%	231 / 667
5×5	1:34.27	1:41.00	top 30.9%	182 / 420
Megaminx	1:44.19	1:55.29	top 37.1%	186 / 313
6×6	3:09.47	3:24.04	top 45.4%	114 / 209
Clock	16.93	18.40	top 55.2%	194 / 263
7×7	5:48.03	6:04.36	top 64.6%	128 / 188
Square-1	41.00	51.75	top 66.7%	208 / 245
Skewb	13.03	20.90	top 70.8%	296 / 338
3×3 Fewest Moves	49 moves	—	early days — 1 solve	174 / 201
3×3 blindfolded	9:31.97	—	early days — 1 solve	279 / 282

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

Best single per competition, 3×3. Faster is higher — the axis is the right way up.

The story so far

8 May 2016First sub-10 3×3: 9.33 at Kawasaki Spring 2016.
1 Jun 2013Six personal bests in one day at Japan Open 2013.
16 Sep 2012Four personal bests in one day at Japan Open 2012.
3 Jun 2012Three personal bests in one day at Kawasaki Open 2012.
8 Apr 2012Five personal bests in one day at Matsudo Spring 2012.
27 Nov 2011First sub-15 3×3: 14.33 at UT Open 2011.

Competitions

Kawasaki Spring 2016 · 8 May 2016 — 2 personal bests set
Asian Championship 2014 · 1 Nov 2014
Kanto Open 2014 · 22 Feb 2014 — 1 personal best set
Japan Open 2013 · 1 Jun 2013 — 6 personal bests set
Rabbit And Turtle 2013 · 9 Mar 2013
East Japan Big Cubes 2013 · 11 Feb 2013 — 1 personal best set
UT Open 2012 · 25 Nov 2012 — 1 personal best set
Japan Open 2012 · 16 Sep 2012 — 4 personal bests set
Kanto Open 2012 · 12 Aug 2012 — 2 personal bests set
Kawasaki Open 2012 · 3 Jun 2012 — 3 personal bests set
Matsudo Spring 2012 · 8 Apr 2012 — 5 personal bests set
UT Open 2011 · 27 Nov 2011 — 1 personal best set
Matsudo Autumn 2011 · 5 Nov 2011 — 2 personal bests set
Matsudo Spring 2011 · 10 Apr 2011 — 3 personal bests set
UT Open 2010 · 21 Nov 2010 — 1 personal best set
Matsudo Open 2010 · 23 Oct 2010
30th Anniversary MegaHouse Cup 2010 · 24 Jul 2010

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.

Nobuaki Suga (菅信昭) — met in 80 rounds, finished ahead 30 times
Yu Nakajima (中島悠) — met in 72 rounds, finished ahead 4 times
Fumiki Koseki (古関章記) — met in 63 rounds, finished ahead 34 times

Next targets

A sub-8 3×3 single — 7,931 people have one; it is 1.33 away.
A sub-2 2×2 single — 8,848 people have one; it is 0.47 away.

Targets move as he improves.