People · Japan
Tomoki Koizumi (小泉朋輝)
3×3 blindfolded · top 7.7% of 12,178 all-time · competing since September 2024 · 2024KOIZ01
Tomoki Koizumi (小泉朋輝) has been competing for 2 years. His best event is the 3×3 blindfolded: a personal-best single of 43.00, set at Tokyo BLD Spring 2026, puts him in the top 7.7% of the 12,178 people who have ever been ranked in the event, and 38th in Japan. Until August 2009, no official 3×3 blindfolded solve in the world had been that fast. Across 7 competitions since September 2024, he has put 28 official solves on the record across four events. His 3×3 blindfolded best has come down from 1:08.60 in October 2025 to 43.00, a 37% improvement. Tomoki has entered seven competitions, more competitions than 88% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| 3×3 blindfolded | 43.00 | — | top 7.7% | 38 / 282 | |
| 3×3 | 12.74 | 14.96 | top 16.5% | 697 / 3,329 | |
| 3×3 Multi-Blind | 2 of 2 cubes · 9:55 | — | early days — 2 solves | 92 / 128 | |
| 4×4 blindfolded | 14:23.00 | — | early days — 2 solves | 59 / 81 |
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 blindfolded. Faster is higher — the axis is the right way up.
The story so far
- 20 Apr 2025First sub-15 3×3: 12.74 at Tokyo Spring AM 2025.
- 15 Sep 2024First competition: Tokai Open PM 2024. A 15.69 3×3 single to start from.
Competitions
- Tokyo BLD Spring 2026 · 29 Mar 2026 — 2 personal bests set
- Tokyo BLD Winter 2026 · 7 Mar 2026
- Ota BLD Autumn 2025 · 8 Nov 2025 — 1 personal best set
- Kanto Autumn AM 2025 · 11 Oct 2025
- Tokyo BLD Spring 2025 · 10 May 2025
- Tokyo Spring AM 2025 · 20 Apr 2025 — 1 personal best set
- Tokai Open PM 2024 · 15 Sep 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.
- Yuki Tsuneyoshi (恒吉優紀) — met in 16 rounds, finished ahead 3 times
- Shota Wakabayashi (若林翔太) — met in 15 rounds, finished ahead 5 times
- Takuma Shirahase (白波瀬拓磨) — met in 15 rounds, finished ahead 4 times
Next targets
- A sub-40 3×3 blindfolded single — 826 people have one; it is 3.00 away.
- A sub-12 3×3 single — 39,535 people have one; it is 0.74 away.
Targets move as he improves.