People · Japan
Arata Koga (古賀新汰)
3×3 · top 21.8% of 284,439 all-time · competing since February 2025 · 2025KOGA02
Arata Koga (古賀新汰) has been competing for a year. His best event is the 3×3: a personal-best single of 14.24, set at Kanto Winter 2026, puts him in the top 21.8% of the 284,439 people who have ever been ranked in the event, and 908th in Japan. Across 3 competitions since February 2025, he has put 15 official solves on the record across one event. His 3×3 best has come down from 17.97 in February 2025 to 14.24, a 21% improvement. Arata has entered three competitions, more competitions than 69% 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 | 14.24 | 17.70 | top 21.8% | 908 / 3,329 |
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
- 21 Feb 2026First sub-15 3×3: 14.24 at Kanto Winter 2026.
- 16 Feb 2025First competition: Tokyo Open PM Winter 2025. A 17.97 3×3 single to start from.
Competitions
- Kanto Winter 2026 · 21 Feb 2026 — 1 personal best set
- Kanto Summer PM 2025 · 30 Aug 2025 — 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.
- Ryohei Yoshioka (吉岡亮平) — met in 3 rounds, finished ahead 3 times
- Kounosuke Udou (有働幸之助) — met in 3 rounds, never finished ahead
- Takashi Tsuchida (土田崇) — met in 3 rounds, never finished ahead
Next targets
- A sub-12 3×3 single — 39,535 people have one; it is 2.24 away.
Targets move as he improves.