People · Japan
Yuta Kokubu (國分優太)
Megaminx · top 1.7% of 34,786 all-time · competing since February 2024 · 2024KOKU01
Yuta Kokubu (國分優太) has been competing for 3 years. His best event is the Megaminx: a personal-best single of 40.27, set at Japan Championship 2026, puts him in the top 1.7% of the 34,786 people who have ever been ranked in the event, and 12th in Japan. Until August 2014, no official Megaminx solve in the world had been that fast. Across 4 competitions since February 2024, he has put 55 official solves on the record across three events. His Square-1 best has come down from 11.81 in July 2024 to 9.04, a 23% improvement. Yuta has entered four competitions, more competitions than 78% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| Megaminx | 40.27 | 44.05 | top 1.7% | 12 / 313 | |
| Square-1 | 9.04 | 11.68 | top 4.5% | 15 / 245 | |
| 3×3 | 10.50 | 10.95 | top 9.0% | 388 / 3,329 |
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, Square-1. Faster is higher — the axis is the right way up.
The story so far
- 10 Feb 2024First competition: Hiroshima Winter 2024. A 10.50 3×3 single to start from.
Competitions
- Japan Championship 2026 · 18 Jul 2026 — 2 personal bests set
- Kansai Parity Party 2025 · 24 Aug 2025 — 2 personal bests set
- Katano Milky Way 2024 · 7 Jul 2024
- Hiroshima Winter 2024 · 10 Feb 2024
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.
- Kantaro Sakamoto (坂本貫太郎) — met in 9 rounds, finished ahead 6 times
- Takayuki Tanaka (田中隆喜) — met in 8 rounds, finished ahead 6 times
- Haruki Tsutsui (筒井遥規) — met in 8 rounds, finished ahead 6 times
Next targets
- A sub-40 Megaminx single — 557 people have one; it is 0.27 away.
- A sub-8 Square-1 single — 766 people have one; it is 1.04 away.
Targets move as he improves.