People · Japan
Soichiro Yamamoto (山本颯一郎)
Square-1 · top 3.4% of 25,662 all-time · competing since July 2024 · 2024YAMA15
Soichiro Yamamoto (山本颯一郎) has been competing for 2 years. His best event is the Square-1: a personal-best single of 8.29, set at Otsu Biwako Autumn 2026, puts him in the top 3.4% of the 25,662 people who have ever been ranked in the event, and 9th in Japan. Until November 2013, no official Square-1 solve in the world had been that fast. Across 6 competitions since July 2024, he has put 107 official solves on the record across four events. Solve to solve, his 3×3 times vary about 12% around a typical one, an early reading from 5 counted rounds. His Square-1 best has come down from 21.99 in July 2024 to 8.29, a 62% improvement. Soichiro has entered six competitions, more competitions than 86% 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 | 8.29 | 9.93 | top 3.4% | 9 / 251 | |
| 3×3 | 8.68 | 11.05 | top 4.2% | 178 / 3,360 | |
| 4×4 | 35.05 | 40.22 | top 6.8% | 76 / 679 | |
| Skewb | 3.86 | 5.45 | top 10.0% | 54 / 354 |
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
- 20 Sep 2026Three personal bests in one day at Otsu Biwako Autumn 2026.
- 15 Sep 2025First sub-10 3×3: 9.26 at Katano Summer 2025.
- 15 Sep 2025Three personal bests in one day at Katano Summer 2025.
- 24 Aug 2025Three personal bests in one day at Kansai Parity Party 2025.
- 7 Jul 2024First competition: Katano Milky Way 2024. A 12.16 3×3 single to start from.
Competitions
- Otsu Biwako Autumn 2026 · 20 Sep 2026 — 3 personal bests set
- Japan Championship 2026 · 18 Jul 2026 — 2 personal bests set
- Katano Summer 2025 · 15 Sep 2025 — 3 personal bests set
- Kansai Parity Party 2025 · 24 Aug 2025 — 3 personal bests set
- Ota Spring 2025 · 20 Mar 2025 — 1 personal best set
- Katano Milky Way 2024 · 7 Jul 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 21 rounds, finished ahead 8 times
- Takayuki Tanaka (田中隆喜) — met in 18 rounds, finished ahead 8 times
- Haruki Tsutsui (筒井遥規) — met in 16 rounds, finished ahead 5 times
Next targets
- A sub-8 Square-1 single — 781 people have one; it is 0.29 away.
- A sub-8 3×3 single — 8,101 people have one; it is 0.68 away.
Targets move as he improves.