Ami Koike

Born
Dec 23, 2003 (22 years old)
Events
300 Metres · 400 m

Ami Koike is a Japan sprinter, born on December 23, 2003. She competes primarily in the 200m, 400m and 4x400m.

Her personal bests include 25.98 in the 200m, 57.35 in the 400m, 3:46.69 in the 4x400m and 40.13 in the 300m. She is currently active on the international athletics circuit, representing Japan.

Personal best · 300 Metres40.13
2025 season best59.39Mar 18, 2025 · Athletic Park, Ageo
Personal best · 400 m57.35
Last competitionJapanese Relays Championships, Nagaragawa Stadium, GifuJul 12, 2025 · 3:53.79

As of Nov 14, 2026: 300 Metres 40.13, 400 m 57.35, 2025 season best 59.39 (Mar 18, 2025, Athletic Park, Ageo (JPN)) · Last competition: Japanese Relays Championships, Nagaragawa Stadium, Gifu, Jul 12, 2025, 3:53.79 · 22 years old

DisciplineResultAll-time
200mFukui 2021Japan 200 m all-time list25.98854 pts–
400mMatsumoto 2021Japan 400 m all-time list57.35928 pts–
4x400mKawasaki 2024Japan 4 × 400 m all-time list3:46.69–
300mMatsumoto 202140.13951 pts–

Progression

SeasonDisciplineResultWindDateCompetitions
2025400m 59.39–Mar 18, 20252025 Spring Challenge Meet
20254x400m 3:53.79–Jul 12, 2025Japanese Relays Championships, Nagaragawa Stadium, Gifu
2024400m 58.27–Jul 14, 202477th Nagano Athletics Championships, Municipal Stadium, Nagano
20244x400m 3:46.69–Sep 21, 202493rd Japan Inter-University Athletics Championships
2023400m 60.40–Sep 22, 202334th Kanto University Rookies Athletics Championships, Gion Stadium, Sagamihara
20234x400m 3:50.28–Sep 16, 202392nd Japan Inter-University Athletics Championships, Prefectural Stadium, Kumagaya
2022200m 26.46+1.8Sep 25, 2022NITTAIDAI Athletic Stadium, Yokohama (JPN)
2022400m 60.56–Jun 9, 2022Yanmar Stadium Nagai, Osaka (JPN)
FAQ

Frequently asked questions

Ami Koike's 300 Metres personal best is 40.13, set on Jul 23, 2021 in Shinshu SkyPark Athletic Field, Matsumoto (JPN).

Ami Koike competes in the 300 Metres and 400 m.

2025 season best: 59.39, set on Mar 18, 2025 in Athletic Park, Ageo (JPN). Last competition: Japanese Relays Championships, Nagaragawa Stadium, Gifu on Jul 12, 2025, 3:53.79.