Kosuke Yamashita
JapanActive- Born
- Nov 28, 2008 (17 years old)
- Events
- 400 m
Kosuke Yamashita is a Japan sprinter, born on November 28, 2008. He competes primarily in the 100m, 400m and 4x400m.
His personal bests include 11.22 in the 100m, 48.24 in the 400m, 3:18.81 in the 4x400m, 3:35.84 in the 4x400Metre and 34.19 in the 300m. He is currently active on the international athletics circuit, representing Japan.
Personal best · 400 m48.24
2026 season best48.05Jun 20, 2026
Last competition79th Shikoku Highschool ChampionshipsJun 20, 2026 · 48.05
As of Nov 13, 2026: 400 m 48.24, 2026 season best 48.05 (Jun 20, 2026) · Last competition: 79th Shikoku Highschool Championships, Jun 20, 2026, 48.05 · 17 years old
Personal bests
WA points calculator →DisciplineResultAll-time
4x400MetreKochi 20253:35.84–
300mHikone 202534.19968 pts–
Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | 400m | 48.05 | – | Jun 20, 2026 | 79th Shikoku Highschool Championships |
| 2025 | 300m | 34.19 | – | Oct 3, 2025 | Japan Games, Athletic Stadium, Hikone |
| 2025 | 400m | 48.24 | – | Aug 23, 2025 | 73rd Shikoku Athletics Championships |
| 2025 | 4x400m | 3:18.81 | – | Jun 16, 2025 | 78th Shikoku High School Athletic Championships and 78th National High School Athletic Championships, Ehime Athletics Stadium, Matsuyama |
| 2025 | 4x400Metre | 3:35.84 | – | Aug 24, 2025 | 73rd Shikoku Athletics Championships |
| 2024 | 400m | 50.57 | – | Oct 5, 2024 | The 26th Shikoku High School Athletics Rookie Tournament |
| 2023 | 100m | 11.22 | +0.9 | Oct 14, 2023 | National Sports Festival |