People · Japan
Ryosei Yamada (山田稜成)
Square-1 · top 3.9% of 25,662 all-time · competing since September 2023 · 2023YAMA12
Ryosei Yamada (山田稜成) has been competing for 3 years. His best event is the Square-1: a personal-best single of 8.59, set at Otsu Biwako Autumn 2026, puts him in the top 3.9% of the 25,662 people who have ever been ranked in the event, and 11th in Japan. Until November 2013, no official Square-1 solve in the world had been that fast. Across 9 competitions since September 2023, he has put 102 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 17% around a typical one, an early reading from 5 counted rounds. His 3×3 best has come down from 18.96 in September 2023 to 13.23, a 30% improvement. Ryosei has entered nine competitions, more competitions than 91% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| Square-1 | 8.59 | 10.80 | top 3.9% | 11 / 251 | |
| Skewb | 3.00 | 6.39 | top 5.0% | 24 / 354 | |
| 2×2 | 2.59 | 3.80 | top 9.9% | 133 / 1,026 | |
| 3×3 | 13.23 | 15.50 | top 18.3% | 798 / 3,360 | |
| 3×3 one-handed | 21.60 | 28.14 | top 25.0% | 203 / 539 | |
| 4×4 | 56.59 | 1:04.87 | top 32.7% | 334 / 679 | |
| 5×5 | 1:45.11 | 2:10.72 | top 39.3% | 217 / 426 | |
| 6×6 | 3:12.02 | 3:13.30 | top 46.8% | 119 / 209 | |
| 7×7 | 4:56.11 | 5:15.17 | early days — 3 solves | 101 / 188 |
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
- 20 Sep 2026Three personal bests in one day at Otsu Biwako Autumn 2026.
- 15 Sep 2024First sub-15 3×3: 14.08 at Tokai Open AM 2024.
- 9 Sep 2023First competition: Tokai Open 2023. A 18.96 3×3 single to start from.
Competitions
- Otsu Biwako Autumn 2026 · 20 Sep 2026 — 3 personal bests set
- Tokai Big Cubes 2025 · 14 Dec 2025 — 1 personal best set
- Kansai Parity Party 2025 · 24 Aug 2025 — 1 personal best set
- Tokai Summer 2025 · 27 Jul 2025 — 1 personal best set
- Tokai Spring 2025 · 12 Apr 2025 — 1 personal best set
- Shonan AM 2024 · 7 Dec 2024 — 1 personal best set
- Tokai Open AM 2024 · 15 Sep 2024 — 1 personal best set
- Tokai Challenge Alpha 2024 · 31 Mar 2024 — 1 personal best set
- Tokai Open 2023 · 9 Sep 2023
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 21 rounds, finished ahead 4 times
- Takayuki Tanaka (田中隆喜) — met in 16 rounds, finished ahead 5 times
- Haruki Tsutsui (筒井遥規) — met in 16 rounds, finished ahead 3 times
Next targets
- A sub-8 Square-1 single — 781 people have one; it is 0.59 away.
- A sub-2 Skewb single — 1,031 people have one; it is 1.00 away.
Targets move as he improves.