HK
Hiroki Kai

Hiroki Kai

JPNJPNMen
Birth dateAug 5, 1994
Height-
Weight-

Hiroki Kai is a Japan long-distance runner, born on August 5, 1994. He competes primarily in the 5000m, 10000m and Semi.

His personal bests include 14:51.70 in the 5000m, 29:48.93 in the 10000m, 1:04:58 in the Semi and 2:15:17 in the Marathon. He is currently active on the international athletics circuit, representing Japan.

Key facts
Marathon
2:15:17
Half Marathon
1:04:58
2026 season best
1:09:35
Jan 11, 2026
2026 season best
Last competition
Tokyo New Year Half Marathon
Jan 11, 2026 · 1:09:35
Tokyo New Year Half Marathon
Age
32 years old

As of Sep 13, 2026: Marathon 2:15:17, Half Marathon 1:04:58, 2026 season best 1:09:35 (Jan 11, 2026) · Last competition: Tokyo New Year Half Marathon, Jan 11, 2026, 1:09:35 · 32 years old

PB

Personal bests

14:51.70
29:48.93
1:04:58
2:15:17

Performance Charts

Season bests

SeasonDisciplineResultWindDateTrendCompetitions
2026
Semi
1:09:35-Jan 11, 2026
↓
Tokyo New Year Half Marathon
2025
LongTrail
11:49:11-Sep 27, 2025-World Mountain & Trail Running Championships, Canfranc-Pirineos
2024
Marathon
2:21:40-Feb 25, 2024
↓
Osaka Marathon
2023
Marathon
2:22:47-Mar 5, 2023
↓
Tokyo Marathon
2022
Semi
1:12:05-Dec 18, 2022
↓
Bangsaen21 Half Marathon, Chon Buri
2022
Marathon
2:15:17-Feb 6, 2022
↓
Oita (JPN)
2021
Marathon
2:17:09-Feb 28, 2021
↓
The 76th Lake Biwa Mainichi Marathon
2020
10000m
30:35.68-Oct 18, 2020
↓
Athletics Stadium, Hadano (JPN)
2020
Marathon
2:18:11-Mar 8, 2020
↓
The 75th Lake Biwa Mainichi Marathon, Otsu
2019
5000m
14:51.70-May 3, 2019-Inzai (JPN)
2019
10000m
31:06.38-Jul 9, 2019
↓
Fukagawa (JPN)
2019
Semi
1:04:58-Feb 10, 2019
↓
All-Japan Corporate Team Half Marathon Championships
2019
Marathon
2:18:55-Dec 1, 2019
↓
The 73rd Fukuoka International Open Marathon Championships, Fukuoka
2018
10000m
29:48.93-Nov 24, 2018
↓
Konosu (JPN)
2018
Marathon
2:19:05-Feb 25, 2018
↓
Tokyo Marathon
2017
Semi
1:07:29-Jan 22, 2017
↓
-
2017
Marathon
2:18:17-Feb 26, 2017
↓
Tokyo (JPN)
2016
Semi
1:07:30-Feb 7, 2016
↓
Kanagawa (JPN)
2015
Semi
1:05:10-Nov 15, 2015
↓
Ageo (JPN)
2014
Semi
1:06:01-Nov 16, 2014
↓
Ageo (JPN)

2026

1 performance
DisciplineResultWindDateCompetitions
Semi
1:09:35-Jan 11Tokyo New Year Half Marathon

2025

2 performances
DisciplineResultWindDateCompetitions
LongTrail
11:49:11-Sep 27World Mountain & Trail Running Championships, Canfranc-Pirineos
LongTrail
11:49:11-Sep 26World Mountain & Trail Running Championships, Canfranc-Pirineos

2024

5 performances
DisciplineResultWindDateCompetitions
Marathon
2:24:59-Dec 15Taipei Marathon
Marathon
2:22:33-Nov 17Kobe Marathon
Marathon
2:29:47-Jul 7ASICS Gold Coast Marathon, Gold Coast
Marathon
2:21:40-Feb 25Osaka Marathon
Marathon
2:28:46-Jan 21Standard Chartered Hong Kong Marathon, Hong Kong

2023

3 performances
DisciplineResultWindDateCompetitions
Marathon
2:24:45-Dec 17Taipei Marathon, Taipei City
Marathon
2:26:04-Jul 2Gold Coast Marathon, Gold Coast
Marathon
2:22:47-Mar 5Tokyo Marathon

2022

3 performances
DisciplineResultWindDateCompetitions
Semi
1:12:05-Dec 18Bangsaen21 Half Marathon, Chon Buri
Marathon
2:17:34-Mar 6Tokyo Marathon
Marathon
2:15:17-Feb 6Beppu-Oita Mainichi Marathon, Oita

2021

1 performance
DisciplineResultWindDateCompetitions
Marathon
2:17:09-Feb 28The 76th Lake Biwa Mainichi Marathon

2020

3 performances
DisciplineResultWindDateCompetitions
Marathon
2:23:22-Dec 6The 74th Fukuoka International Open Marathon Championships, Fukuoka
10000m
30:35.68-Oct 1812th Tokai University Competition, Athletics Stadium, Hadano
Marathon
2:18:11-Mar 8The 75th Lake Biwa Mainichi Marathon, Otsu

2019

5 performances
DisciplineResultWindDateCompetitions
Marathon
2:18:55-Dec 1The 73rd Fukuoka International Open Marathon Championships, Fukuoka
10000m
31:06.38-Jul 9Hokuren Distance Challenge, Fukagawa
5000m
14:51.70-May 32nd Juntendo University Meet, Inzai
Marathon
2:19:31-Apr 15B.A.A. Boston Marathon, Boston, MA
Semi
1:04:58-Feb 10All-Japan Corporate Team Half Marathon Championships

2018

4 performances
DisciplineResultWindDateCompetitions
10000m
29:48.93-Nov 24Konosu
Marathon
2:28:23-Nov 9Phuket Marathon, Phuket
Marathon
2:25:01-Apr 8Paris Marathon
Marathon
2:19:05-Feb 25Tokyo Marathon

2017

5 performances
DisciplineResultWindDateCompetitions
Marathon
2:29:37-Dec 10Phuket Marathon, Phuket
Marathon
2:18:20-Nov 23Otawara Marathon, Otawara
Marathon
2:18:17-Feb 26Tokyo Marathon, Tokyo
Marathon
2:22:09-Jan 29Hitachinaka Katsuta Marathon, Hitachinaka
Semi
1:07:29-Jan 22Chiba Marine Half Marathon, Chiba

2016

1 performance
DisciplineResultWindDateCompetitions
Semi
1:07:30-Feb 7Kanagawa Half Marathon, Kanagawa

2015

1 performance
DisciplineResultWindDateCompetitions
Semi
1:05:10-Nov 15Ageo City Half Marathon, Ageo

2014

1 performance
DisciplineResultWindDateCompetitions
Semi
1:06:01-Nov 16Ageo City Half Marathon, Ageo

Honours

No medals

FAQ

Frequently asked questions

What is Hiroki Kai's Marathon personal best?

Hiroki Kai's Marathon personal best is 2:15:17, set on Feb 6, 2022 in Oita (JPN).

Which events does Hiroki Kai compete in?

Hiroki Kai competes in the Marathon and Half Marathon.

How did Hiroki Kai perform in 2026?

2026 season best: 1:09:35, set on Jan 11, 2026. Last competition: Tokyo New Year Half Marathon on Jan 11, 2026, 1:09:35.