AK

Ayato Kosako

JPNJPNMen
Birth dateDec 19, 2005
Height-
Weight-

Ayato Kosako is a Japan race walker, born on December 19, 2005. He competes primarily in the 20kmW, 10Kilometr and 5000m-short-track.

His personal bests include 1:25:32 in the 20kmW, 43:09 in the 10Kilometr, 21:31.27 in the 5000m-short-track, 41:34.57 in the 10,000Metr and 1:34:25 in the HalfMarath. He is currently active on the international athletics circuit, representing Japan.

Key facts
20 km race walk
1:25:32
10,000 Metres Short Track
41:34.57
2026 season best
43:39.70
Apr 5, 2026 · Oi Stadium, Tokyo (JPN)
2026 season best
Last competition
All Japan University Track & Field Challenge
Apr 24, 2026 · DQ
All Japan University Track & Field Challenge
Age
20 years old

As of Sep 13, 2026: 20 km race walk 1:25:32, 10,000 Metres Short Track 41:34.57, 2026 season best 43:39.70 (Apr 5, 2026, Oi Stadium, Tokyo (JPN)) · Last competition: All Japan University Track & Field Challenge, Apr 24, 2026, DQ · 20 years old

PB

Personal bests

1:25:32
43:09
21:31.27
41:34.57
1:34:25

Performance Charts

Season bests

SeasonDisciplineResultWindDateTrendCompetitions
2026
10,000Metr
43:39.70-Apr 5, 2026
↑
The 10th Tokyo Gakugei University Race Walking Meeting & The 1st School Team Championships , Middle
2026
HalfMarath
1:34:25-Feb 15, 2026-Japanese Half Marathon Race Walking Championships
2025
10,000Metr
41:34.57-Apr 12, 2025
↑
The University of Tokyo 6th Race Walking Challenge Games
2025
10Kilometr
41:34.57-Apr 12, 2025
↑
The University of Tokyo 6th Race Walking Challenge Games
2025
20kmW
1:25:32-Jan 1, 2025
↓
New Year Race Walk in Tokyo 2025, Tokyo
2024
10Kilometr
43:09-Mar 17, 2024
↑
48th All Japan Race Walking, Nomi
2024
10,000Metr
45:07.21-Sep 28, 2024
↑
35th Kanto University Rookies Athletics Championships
2024
20kmW
1:26:13-Oct 27, 2024
↓
61st All Japan Race Walking
2023
5000m-short-track
21:31.27-Aug 3, 2023-Inter-High School Championships, Atsubetsu Park Stadium, Sapporo
2023
20kmW
21:36.43-Jun 17, 2023
↓
76th Chugoku District High School Championships, Prefectural Stadium, Okayama

2025

10 performances
DisciplineResultWindDateCompetitions
HalfMarath
DQ-Oct 2662nd All Japan Race Walking Takahata 2025
10,000Metr
42:39.32-May 10The 104th Kanto Inter-University Track＆Field Championships, Gion Stadium, Sagamihara
10Kilometr
42:39.32-May 9The 104th Kanto Inter-University Track＆Field Championships, Gion Stadium, Sagamihara
10Kilometr
41:44.37-Apr 26All Japan University Track & Field Challenge, Tokai University Stadium, Hiratsuka
10,000Metr
41:44.37-Apr 26All Japan University Track & Field Challenge, Tokai University Stadium, Hiratsuka
10Kilometr
41:34.57-Apr 12The University of Tokyo 6th Race Walking Challenge Games
10,000Metr
41:34.57-Apr 12The University of Tokyo 6th Race Walking Challenge Games
20kmW
1:27:01-Mar 16Asian Race Walking Championships
20kmW
1:31:01-Feb 16Japenese 20km Race Walking Championships
20kmW
1:25:32-Jan 1New Year Race Walk in Tokyo 2025, Tokyo

2023

2 performances
DisciplineResultWindDateCompetitions
5000m-short-track
21:31.27-Aug 3Inter-High School Championships, Atsubetsu Park Stadium, Sapporo
5000m-short-track
21:36.43-Jun 1676th Chugoku District High School Championships, Prefectural Stadium, Okayama

Honours

No medals

FAQ

Frequently asked questions

What is Ayato Kosako's 20 km race walk personal best?

Ayato Kosako's 20 km race walk personal best is 1:25:32, set on Jan 1, 2025 in Tokyo (JPN).

Which events does Ayato Kosako compete in?

Ayato Kosako competes in the 20 km race walk and 10,000 Metres Short Track.

How did Ayato Kosako perform in 2026?

2026 season best: 43:39.70, set on Apr 5, 2026 in Oi Stadium, Tokyo (JPN). Last competition: All Japan University Track & Field Challenge on Apr 24, 2026, DQ.