Kei Kobayashi

JapanJapan
Born
Nov 24, 2009 (16 years old)
Events
100 m · 200 m

Kei Kobayashi is a Japan sprinter, born on November 24, 2009. She competes primarily in the 100m, 200m and 4x100m.

Her personal bests include 11.99 in the 100m, 24.82 in the 200m and 46.42 in the 4x100m. She is currently active on the international athletics circuit, representing Japan.

Personal best · 100 m11.99
2025 season best11.99Oct 3, 2025 · Athletic Stadium, Hikone
2025 season best
Personal best · 200 m24.82
Last competition27th Shikoku Highschool Rookies Championships, Pikara Stadium, MarugameOct 12, 2025 · 24.82
27th Shikoku Highschool Rookies Championships, Pikara Stadium, Marugame

As of Nov 15, 2026: 100 m 11.99, 200 m 24.82, 2025 season best 11.99 (Oct 3, 2025, Athletic Stadium, Hikone (JPN)) · Last competition: 27th Shikoku Highschool Rookies Championships, Pikara Stadium, Marugame, Oct 12, 2025, 24.82 · 16 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
100mHikone 2025Japan 100 m all-time list11.99993 pts–
200mMarugame 2025Japan 200 m all-time list24.82958 pts–
4x100mKochi 2025Japan 4 × 100 m all-time list46.42–

Progression

SeasonDisciplineResultWindDateCompetitions
2025100m 11.99+0.1Oct 3, 2025Japan Games, Athletic Stadium, Hikone
2025200m 24.82+0.5Oct 12, 202527th Shikoku Highschool Rookies Championships, Pikara Stadium, Marugame
20254x100m 46.42–Aug 23, 202573rd Shikoku Athletics Championships
2024100m 12.13+1.1Oct 11, 2024National Sports Festival 2024 Saga
FAQ

Frequently asked questions

Kei Kobayashi's 100 m personal best is 11.99, set on Oct 3, 2025 in Athletic Stadium, Hikone (JPN).

Kei Kobayashi competes in the 100 m and 200 m.

2025 season best: 11.99, set on Oct 3, 2025 in Athletic Stadium, Hikone (JPN). Last competition: 27th Shikoku Highschool Rookies Championships, Pikara Stadium, Marugame on Oct 12, 2025, 24.82.