Ko OI
JapanActive- Born
- Mar 22, 2005 (21 years old)
- Events
- 100 m · 400 m
Ko OI is a Japan sprinter, born on March 22, 2005. He competes primarily in the 100m, 200m and 400m.
His personal bests include 10.95 in the 100m, 22.76 in the 200m, 49.67 in the 400m and 35.42 in the 300m. He is currently active on the international athletics circuit, representing Japan.
Personal best · 100 m10.95
2026 season best22.02Jun 20, 2026
Personal best · 400 m49.67
Last competition95th Japan Inter-University Athletics ChampionshipsSep 5, 2026 · 40.53
As of Nov 13, 2026: 100 m 10.95, 400 m 49.67, 2026 season best 22.02 (Jun 20, 2026) · Last competition: 95th Japan Inter-University Athletics Championships, Sep 5, 2026, 40.53 · 21 years old
Personal bests
WA points calculator →DisciplineResultAll-time
300mObihiro 202235.42868 pts–
* Wind-assisted (> 2.0 m/s)
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | 200m | 22.02 | -1.2 | Jun 20, 2026 | 48th All North-Japan Inter University Track and Field Championships |
| 2025 | 100m | 10.95 | +3.0 | Aug 9, 2025 | 2025 National Athletic Meet Hokkaido representative selection meeting |
| 2025 | 200m | 22.82 | +0.6 | Jul 13, 2025 | 38th Chuhei Nambu Memorial Athletics Meeting, Citizens Athletics Stadium, Kushiro |
| 2025 | 300m | 36.00 | – | Aug 10, 2025 | 2025 National Athletic Meet Hokkaido representative selection meeting |
| 2023 | 400m | 50.18 | – | May 26, 2023 | Atsubetsu Park Stadium, Sapporo (JPN) |
| 2022 | 300m | 35.42 | – | Oct 22, 2022 | Municipal Stadium, Obihiro (JPN) |
| 2022 | 400m | 49.67 | – | Jul 16, 2022 | Municipal Stadium, Obihiro (JPN) |
| 2021 | 200m | 22.76 | -0.4 | Aug 7, 2021 | Municipal Stadium, Obihiro (JPN) |