KA

Kouki ASAI

JPNJPNMen
Birth dateJan 18, 2003
Height-
Weight-

Kouki ASAI is a Japan long-distance runner, born on January 18, 2003. He competes primarily in the 3000m, 5000m and 10000m.

His personal bests include 8:36.48 in the 3000m, 13:54.17 in the 5000m, 28:25.44 in the 10000m, 1:00:54 in the Semi and 9:29.75 in the 3000mSt. He is currently active on the international athletics circuit, representing Japan.

Key facts
Half Marathon
1:00:54
10 000 m
28:25.44
2026 season best
1:00:54
Feb 8, 2026
2026 season best
Last competition
HOKUREN Distance Challenge in ABASHIRI
Jul 8, 2026 · 28:27.51
HOKUREN Distance Challenge in ABASHIRI
Age
23 years old

As of Sep 16, 2026: Half Marathon 1:00:54, 10 000 m 28:25.44, 2026 season best 1:00:54 (Feb 8, 2026) · Last competition: HOKUREN Distance Challenge in ABASHIRI, Jul 8, 2026, 28:27.51 · 23 years old

Performance Charts

Season bests

SeasonDisciplineResultWindDateTrendCompetitions
2026
10000m
28:27.51-Jul 8, 2026
↑
HOKUREN Distance Challenge in ABASHIRI
2026
Semi
1:00:54-Feb 8, 2026
↑
54th Yamaguchi All-Corporate Half Marathon Championships
2025
5000m
13:54.17-May 11, 2025
↑
69th Central Japan Corporate Teams Athletics Championships, Nagaragawa Stadium, Gifu - Open Event
2025
10000m
28:25.44-Nov 22, 2025
↑
Hachioji Long Distance
2025
Semi
1:01:48-Feb 2, 2025
↑
77th Kagawa Marugame International Half Marathon, Marugame
2024
Semi
1:01:09-Feb 4, 2024
↑
76th Kagawa Marugame International Half Marathon
2023
5000m
14:12.94-Apr 9, 2023
↑
59th Four University Inter-College Track and Field Tournament, Gion Stadium, Sagamihara
2023
10000m
28:30.11-May 11, 2023
↑
102nd Kanto Inter-University Track & Field Championships, Gion Stadium, Sagamihara - 2nd Tier
2022
Semi
1:02:13-Nov 20, 2022
↑
-
2021
3000m
8:36.48-May 2, 2021--
2021
5000m
14:14.37-Jun 5, 2021
↑
-
2021
10000m
28:45.31-Oct 16, 2021
↑
-
2020
3000mSt
9:29.75-Jul 4, 2020--
2020
5000m
14:16.40-Oct 17, 2020
↑
-

2026

2 performances
DisciplineResultWindDateCompetitions
10000m
28:27.51-Jul 8HOKUREN Distance Challenge in ABASHIRI
Semi
1:00:54-Feb 854th Yamaguchi All-Corporate Half Marathon Championships

2022

1 performance
DisciplineResultWindDateCompetitions
Semi
1:02:13-Nov 20Ageo City Half Marathon, Ageo

2021

7 performances
DisciplineResultWindDateCompetitions
10000m
28:45.31-Oct 169th Juntendo University Competition, Juntendo University Stadium, Inzai
10000m
30:47.52-Jul 106th Juntendo University Competition, Juntendo University Stadium, Inzai
5000m
14:22.64-Jul 35th Juntendo University Competition, Juntendo University Stadium, Inzai
5000m
14:14.37-Jun 5Japan University Championships, Lemon Gas Stadium, Hiratsuka
3000m
8:36.48-May 23rd Juntendo University Competition, Juntendo University Stadium, Inzai
10000m
29:07.35-Apr 24286th Nippon Sport Science University Long Distance Competition, NITTAIDAI Athletic Stadium, Yokohama
10000m
29:11.39-Mar 2610th Juntendo University Competition, Juntendo University Stadium, Inzai

2020

3 performances
DisciplineResultWindDateCompetitions
5000m
14:45.34-Nov 2184th Heisei Kokusai University Long Distance Competition, Athletics Stadium, Konosu
5000m
14:16.40-Oct 1712th Tokai University Competition, Athletics Stadium, Hadano
3000mSt
9:29.75-Jul 480th Aichi Prefectural Championships, Municipal Mizuho Stadium, Nagoya

Honours

No medals

FAQ

Frequently asked questions

What is Kouki ASAI's Half Marathon personal best?

Kouki ASAI's Half Marathon personal best is 1:00:54, set on Feb 8, 2026 in Ishin Me-Life Stadium, Yamaguchi (JPN).

Which events does Kouki ASAI compete in?

Kouki ASAI competes in the Half Marathon and 10 000 m.

How did Kouki ASAI perform in 2026?

2026 season best: 1:00:54, set on Feb 8, 2026. Last competition: HOKUREN Distance Challenge in ABASHIRI on Jul 8, 2026, 28:27.51.