People · Japan
Seiichiro Yamaguchi (山口誠一朗)
3×3 · top 27.0% of 288,433 all-time · competing since July 2024 · 2024YAMA13
Seiichiro Yamaguchi (山口誠一朗) has been competing for 2 years. His best event is the 3×3: a personal-best single of 15.73, set at Kansai Odd and BLD 2025, puts him in the top 27.0% of the 288,433 people who have ever been ranked in the event, and 1,113th in Japan. Across 2 competitions since July 2024, he has put 15 official solves on the record across one event. His 3×3 best has come down from 32.44 in July 2024 to 15.73, a 52% improvement. Seiichiro has entered two competitions.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| 3×3 | 15.73 | 18.53 | top 27.0% | 1,113 / 3,360 |
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
- 15 Jun 2025First sub-30 3×3: 15.73 at Kansai Odd and BLD 2025.
- 15 Jun 2025First sub-20 3×3: 15.73 at Kansai Odd and BLD 2025.
- 7 Jul 2024First competition: Katano Milky Way 2024. A 32.44 3×3 single to start from.
Competitions
- Kansai Odd and BLD 2025 · 15 Jun 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.
- Akatsuki Kitamura (北村曉) — met in 3 rounds, finished ahead once
- Yoshika Ito (伊藤良華) — met in 3 rounds, finished ahead once
- Tokiya Matsuda (松田時弥) — met in 3 rounds, finished ahead once
Next targets
- A sub-15 3×3 single — 70,740 people have one; it is 0.73 away.
Targets move as he improves.