KI
Keiko Isogai

Keiko Isogai

JPNJPNWomen
Birth dateJul 22, 1981
Height-
Weight-

Keiko Isogai is a Japan long-distance runner, born on July 22, 1981. She competes primarily in the 3000m, 5000m and 10000m.

Her personal bests include 9:17.70 in the 3000m, 15:52.46 in the 5000m, 32:50.42 in the 10000m, 1:10:15 in the Semi and 34:07 in the 10Kilometr. She is currently active on the international athletics circuit, representing Japan.

Key facts
Half Marathon
1:10:15
#942 all-time
10 000 m
32:50.42
2005 season best
1:13:56
Jul 3, 2005 · Sapporo (JPN)
2005 season best
Age
45 years old

As of Oct 1, 2026: Half Marathon 1:10:15 (#942 all-time), 10 000 m 32:50.42, 2005 season best 1:13:56 (Jul 3, 2005, Sapporo (JPN)) · 45 years old

Performance Charts

Season bests

SeasonDisciplineResultWindDateTrendCompetitions
2005
5000m
16:18.39-May 29, 2005
↓
Yokohama (JPN)
2005
10000m
32:59.97-May 14, 2005
↓
Hitachinaka (JPN)
2005
Semi
1:13:56-Jul 3, 2005
↓
Sapporo (JPN)
2004
Semi
1:14:39-Oct 3, 2004
↓
New Delhi IAAF World Half Marathon Championships
2003
5000m
16:11.44-Jun 22, 2003
↓
Abashiri (JPN)
2003
10000m
33:00.62-Sep 27, 2003
↓
Okayama (JPN)
2003
Semi
1:11:55-Mar 9, 2003
↓
Yamaguchi (JPN)
2002
3000m
9:17.70-Jun 1, 2002-Tokyo (JPN)
2002
5000m
15:52.46-Jun 30, 2002
↓
Yokohama (JPN)
2002
10000m
32:50.42-May 18, 2002
↓
Utsunomiya (JPN)
2001
5000m
15:54.75-Nov 28, 2001
↓
Hachioji (JPN)
2000
10Kilometr
34:07-Oct 8, 2000-Niigata (JPN)

2005

4 performances
DisciplineResultWindDateCompetitions
Semi
1:13:56-Jul 3Sapporo Half Marathon, Sapporo
5000m
16:30.82-Jun 25Shibetsu Hokuren Distance Challenge, Shibetsu
5000m
16:18.39-May 29Yokohama
10000m
32:59.97-May 14Hitachinaka East Japan Corporate Ch., Hitachinaka

2004

3 performances
DisciplineResultWindDateCompetitions
Semi
1:14:39-Oct 3New Delhi IAAF World Half Marathon Championships
Semi
1:10:20-Mar 14All-Corporate Half Marathon Championships, Yamaguchi
Semi
1:10:15-Jan 6Miyazaki Half Marathon, Miyazaki

2003

6 performances
DisciplineResultWindDateCompetitions
10000m
33:00.62-Sep 27Okayama Japanese Corporate Ch., Okayama
Semi
1:13:45-Jul 6Sapporo Half Marathon, Sapporo
5000m
16:11.44-Jun 22Abashiri
10000m
33:05.72-May 18Sendai
Semi
1:11:55-Mar 9Yamaguchi Half Marathon, Yamaguchi
Semi
1:12:05-Feb 16Kobe Half Marathon, Kobe

2002

4 performances
DisciplineResultWindDateCompetitions
5000m
16:08.98-Sep 29Fukuchiyama Japanese Corporate Team Championships, Fukuchiyama
5000m
15:52.46-Jun 30Yokohama
3000m
9:17.70-Jun 1Tokyo
10000m
32:50.42-May 18Utsunomiya

2001

2 performances
DisciplineResultWindDateCompetitions
5000m
15:54.75-Nov 28Hachioji
5000m
15:58.47-Oct 14Kobe

2000

1 performance
DisciplineResultWindDateCompetitions
10Kilometr
34:07-Oct 8Niigata 10 km, Niigata

Honours

No medals

FAQ

Frequently asked questions

What is Keiko Isogai's Half Marathon personal best?

Keiko Isogai's Half Marathon personal best is 1:10:15, set on Jan 6, 2004 in Miyazaki (JPN), #942 on the all-time list.

Which events does Keiko Isogai compete in?

Keiko Isogai competes in the Half Marathon and 10 000 m.

How did Keiko Isogai perform in 2005?

2005 season best: 1:13:56, set on Jul 3, 2005 in Sapporo (JPN).