Naoko Koizumi

Naoko Koizumi

JapanJapan
Born
Dec 14, 1992 (33 years old)
Events
10 Kilometres Road · 5000 m

Naoko Koizumi is a Japan middle-distance runner, born on December 14, 1992. She competes primarily in the 1500m, 3000m and 5000m.

Her personal bests include 4:22.73 in the 1500m, 9:06.72 in the 3000m, 15:36.90 in the 5000m, 33:30.37 in the 10000m and 32:52 in the 10Kilometr. She is currently active on the international athletics circuit, representing Japan.

Personal best · 10 Kilometres Road32:52
2024 season best34:49Feb 11, 2024 · Ishin Me-Life Stadium, Yamaguchi
2024 season best
Personal best · 5000 m15:36.90
Last competition78th Niigata Pref ChampionshipsJul 13, 2024 · 4:52.66
78th Niigata Pref Championships

As of Nov 13, 2026: 10 Kilometres Road 32:52, 5000 m 15:36.90, 2024 season best 34:49 (Feb 11, 2024, Ishin Me-Life Stadium, Yamaguchi (JPN)) · Last competition: 78th Niigata Pref Championships, Jul 13, 2024, 4:52.66 · 33 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
1500mNiigata 2010Japan 1500 m all-time list4:22.731,030 pts–
3000mKitami 2015Japan 3000 m all-time list9:06.721,084 pts–
5000mYokohama 2015Japan 5000 m all-time list15:36.901,093 pts–
10000mKumamoto 2021Japan 10 000 m all-time list33:30.371,061 pts–
10KilometrOkayama 202032:52–

Progression

SeasonDisciplineResultWindDateCompetitions
20241500m 4:52.66–Jul 13, 202478th Niigata Pref Championships
202410Kilometr 34:49–Feb 11, 202452nd Yamaguchi All-Corporate Half Marathon Championships
20215000m 16:02.91–Jul 10, 2021Athletic Track, Abashiri (JPN)
202110000m 33:30.37–Apr 10, 202129th Kanakuri Memorial Meet
20205000m 16:11.02–Dec 5, 2020Ishin Me-Life Stadium, Yamaguchi (JPN)
202010Kilometr 32:52–Dec 20, 2020Okayama (JPN)
20195000m 16:25.04–Dec 21, 2019NITTAIDAI Athletic Stadium, Yokohama (JPN)
20183000m 9:33.07–Jul 4, 2018Abashiri (JPN)
FAQ

Frequently asked questions

Naoko Koizumi's 10 Kilometres Road personal best is 32:52, set on Dec 20, 2020 in Okayama (JPN).

Naoko Koizumi competes in the 10 Kilometres Road and 5000 m.

2024 season best: 34:49, set on Feb 11, 2024 in Ishin Me-Life Stadium, Yamaguchi (JPN). Last competition: 78th Niigata Pref Championships on Jul 13, 2024, 4:52.66.