Yuujiro Koshiba
JapanActive- Born
- May 9, 2005 (21 years old)
- Events
- Half Marathon · 10 000 m
Yuujiro Koshiba is a Japan middle-distance runner, born on May 9, 2005. He competes primarily in the 1500m, 3000m and 5000m.
His personal bests include 3:48.32 in the 1500m, 8:22.31 in the 3000m, 13:46.25 in the 5000m, 28:48.57 in the 10000m and 1:03:08 in the Semi. He is currently active on the international athletics circuit, representing Japan.
Personal best · Half Marathon1:03:08
2026 season best1:03:53Oct 17, 2026
Personal best · 10 000 m28:48.57
Last competitionThe 103rd Hakone Ekiden Qualifying MeetOct 17, 2026 · 1:03:53
As of Nov 13, 2026: Half Marathon 1:03:08, 10 000 m 28:48.57, 2026 season best 1:03:53 (Oct 17, 2026) · Last competition: The 103rd Hakone Ekiden Qualifying Meet, Oct 17, 2026, 1:03:53 · 21 years old
Personal bests
WA points calculator →DisciplineResultAll-time2026
5KilometreTokorozawa 202513:50––
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | 5000m | 13:46.25 | – | May 24, 2026 | The 105th Kanto Inter-University Track＆Field Championships |
| 2026 | 10000m | 28:48.57 | – | May 4, 2026 | Selection Meeting for 58th All Japan Inter-University Ekiden, Lemon Gas Stadium, Hiratsuka |
| 2026 | Semi | 1:03:53 | – | Oct 17, 2026 | The 103rd Hakone Ekiden Qualifying Meet |
| 2025 | 5Kilometre | 13:50 | – | Sep 28, 2025 | The Road of Waseda |
| 2025 | 5000m | 14:25.09 | – | Jul 12, 2025 | HOKUREN Distance Challenge 2025 in Chitose, Aoba Park Athletic Field, Chitose |
| 2025 | 10000m | 29:33.50 | – | May 24, 2025 | Selection Meeting for 57th All Japan Inter-University Ekiden, Lemon Gas Stadium, Hiratsuka |
| 2025 | Semi | 1:03:08 | – | Oct 19, 2025 | Tokyo Legacy Half Marathon |
| 2024 | 1500m | 3:48.32 | – | Apr 13, 2024 | 32nd Kanakuri Memorial Middle and Long Distance Invitational Meet, Egao Kenko Stadium, Kumamoto |