People · Japan
Rentaro Kawai (河井廉太郎)
2×2 · top 21.4% of 186,767 all-time · competing since February 2025 · 2025KAWA02
Rentaro Kawai (河井廉太郎) has been competing for a year. His best event is the 2×2: a personal-best single of 3.60, set at Tokyo Spring 2026, puts him in the top 21.4% of the 186,767 people who have ever been ranked in the event, and 265th in Japan. Across 2 competitions since February 2025, he has put 20 official solves on the record across three events. His 3×3 best has come down from 22.16 in February 2025 to 19.39, a 12% improvement. Rentaro has entered two competitions.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Japan | |
|---|---|---|---|---|---|
| 2×2 | 3.60 | 6.64 | top 21.4% | 265 / 1,021 | |
| 3×3 | 19.39 | 20.80 | top 38.2% | 1,448 / 3,329 | |
| Pyraminx | 13.90 | 18.29 | top 77.4% | 593 / 688 |
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
- 5 Apr 2026First sub-20 3×3: 19.39 at Tokyo Spring 2026.
- 16 Feb 2025First competition: Tokyo Open PM Winter 2025. A 22.16 3×3 single to start from.
Competitions
- Tokyo Spring 2026 · 5 Apr 2026 — 1 personal best set
- Tokyo Open PM Winter 2025 · 16 Feb 2025
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.
- Shoji Ueda (植田昌司) — met in 4 rounds, finished ahead twice
- Yusuke Takada (高田祐介) — met in 4 rounds, never finished ahead
- Ao Nogami (野上碧) — met in 4 rounds, never finished ahead
Next targets
- A sub-3 2×2 single — 26,570 people have one; it is 0.60 away.
- A sub-15 3×3 single — 69,493 people have one; it is 4.39 away.
Targets move as he improves.