KY
Kosei Yamaguchi
JPNMenBirth dateAug 19, 1991
Height-
Weight-
Kosei Yamaguchi is a Japan middle-distance runner, born on August 19, 1991. He competes primarily in the 1500m, 3000m and 5000m.
His personal bests include 3:45.86 in the 1500m, 7:56.19 in the 3000m, 13:31.24 in the 5000m, 28:12.05 in the 10000m and 1:03:08 in the Semi. He has earned 1 gold medal in major international competitions. He is currently active on the international athletics circuit, representing Japan.
Key facts
10 000 m
28:12.05
Last competition
51st Yamaguchi All-Corporate Half Marathon Championships
Feb 12, 2023 · 1:03:08
Age
35 years old
As of Sep 16, 2026: 3000 m steeplechase 8:19.96 (#365 all-time), 10 000 m 28:12.05, 2023 season best 1:03:08 (Feb 12, 2023, Ishin Me-Life Stadium, Yamaguchi (JPN)) · Last competition: 51st Yamaguchi All-Corporate Half Marathon Championships, Feb 12, 2023, 1:03:08 · 35 years old
PB
Personal bests
3:45.86
7:56.19
13:31.24
28:12.05
1:03:08
5:32.32
1:00:18
Performance Charts
Season bests
| Season | Discipline | Result | Wind | Date | Trend | Competitions |
|---|---|---|---|---|---|---|
| 2023 | Semi | 1:03:08 | - | Feb 12, 2023 | ↑ | 51st Yamaguchi All-Corporate Half Marathon Championships |
| 2022 | 1500m | 3:45.86 | - | Sep 17, 2022 | ↑ | Komazawa Olympic Park Athletic Stadium, Tokyo (JPN) |
| 2022 | 3000m | 7:56.19 | - | Mar 12, 2022 | - | Sydney Track Classic, SOPAC, Sydney |
| 2022 | 3000mSt | 8:23.29 | - | Jun 11, 2022 | ↑ | 106th Japan Championships, Yanmar Stadium Nagai, Osaka |
| 2022 | 5000m | 13:32.38 | - | May 14, 2022 | ↑ | Nagaragawa Stadium, Gifu (JPN) |
| 2022 | 10000m | 28:27.13 | - | Nov 26, 2022 | ↑ | Gion Stadium, Machida (JPN) |
| 2021 | 3000mSt | 8:19.96 | - | Jun 26, 2021 | ↑ | 105th Japan Championships, Yanmar Stadium Nagai, Osaka |
| 2021 | 5000m | 13:31.24 | - | May 16, 2021 | ↑ | Nagaragawa Stadium, Gifu (JPN) |
| 2021 | 10000m | 28:18.76 | - | Nov 27, 2021 | ↑ | Kamiyugi Park Athletic Stadium, Hachioji (JPN) |
| 2020 | 3000mSt | 8:24.19 | - | Dec 4, 2020 | ↑ | 104th Japan Championships |
| 2020 | 5000m | 13:35.65 | - | Sep 26, 2020 | ↑ | Chukyo Univ. Stadium, Toyota (JPN) |
| 2020 | 10000m | 28:12.05 | - | Oct 9, 2020 | ↑ | Tajimi (JPN) |
| 2019 | 1500m | 3:53.41 | - | May 11, 2019 | ↑ | Gifu (JPN) |
| 2019 | 3000mSt | 8:31.37 | - | Sep 21, 2019 | ↑ | 67th All Japan Corporate Team Championships, Yanmar Stadium Nagai, Osaka |
| 2019 | 5000m | 13:48.68 | - | May 4, 2019 | ↑ | Nobeoka (JPN) |
| 2019 | CrossCount | 35:04 | - | Mar 30, 2019 | ↓ | 43rd IAAF World Cross Country Championships, Århus |
| 2018 | 2000Metres | 5:32.32 | - | Jul 4, 2018 | - | Abashiri (JPN) |
| 2018 | 3000mSt | 8:30.98 | - | Jul 18, 2018 | ↑ | Liège Meeting Internationale de la Province de Liège, Liège |
| 2018 | 5000m | 13:41.21 | - | Jul 21, 2018 | ↑ | Heusden-Zolder KBC Night of Athletics, Heusden-Zolder |
| 2018 | 10000m | 28:34.14 | - | Nov 24, 2018 | ↑ | Machida (JPN) |
| 2017 | 3000mSt | 8:38.87 | - | Apr 23, 2017 | ↑ | Kobe (JPN) |
| 2017 | 5000m | 13:52.61 | - | Dec 3, 2017 | ↑ | Yokohama (JPN) |
| 2017 | 10000m | 28:34.32 | - | Nov 25, 2017 | ↑ | Hosei University Stadium, Machida (JPN) |
| 2017 | CrossCount | 31:49 | - | Mar 26, 2017 | ↓ | 42nd IAAF World Cross Country Championships, Kololo, Kampala |
| 2016 | 3000mSt | 8:36.78 | - | Apr 24, 2016 | ↑ | Kobe (JPN) |
| 2016 | 5000m | 13:53.37 | - | Apr 2, 2016 | ↑ | Tokyo (JPN) |
| 2016 | 10000m | 28:34.19 | - | Nov 26, 2016 | ↑ | Hachioji (JPN) |
| 2016 | Semi | 1:03:29 | - | Feb 14, 2016 | ↑ | Yamaguchi (JPN) |
| 2015 | 3000mSt | 8:44.56 | - | Jun 26, 2015 | ↑ | Nagoya (JPN) |
| 2015 | 5000m | 14:06.38 | - | Sep 27, 2015 | ↑ | Gifu (JPN) |
| 2015 | 10000m | 28:46.02 | - | Oct 12, 2015 | ↑ | Tajimi (JPN) |
| 2015 | Semi | 1:03:33 | - | Feb 15, 2015 | ↑ | Yamaguchi (JPN) |
| 2014 | 3000mSt | 8:42.13 | - | Oct 11, 2014 | ↑ | Yamaguchi (JPN) |
| 2014 | 5000m | 13:56.95 | - | Oct 12, 2014 | ↑ | Yamaguchi (JPN) |
| 2014 | 10000m | 29:31.89 | - | Nov 29, 2014 | ↑ | Tokyo (JPN) |
| 2013 | 3000mSt | 8:41.93 | - | May 25, 2013 | ↑ | Yokohama (JPN) |
| 2013 | 5000m | 13:53.80 | - | Apr 28, 2013 | ↑ | Hiroshima (JPN) |
| 2013 | 10000m | 28:48.13 | - | Nov 16, 2013 | ↑ | Yokohama (JPN) |
| 2013 | 20Kilometr | 1:00:18 | - | Oct 19, 2013 | ↑ | Tachikawa (JPN) |
| 2012 | 3000mSt | 8:45.87 | - | May 19, 2012 | ↑ | Tokyo (JPN) |
| 2012 | 5000m | 13:53.74 | - | Oct 13, 2012 | ↑ | Shizuoka (JPN) |
| 2012 | 10000m | 29:09.98 | - | Nov 17, 2012 | ↑ | Yokohama (JPN) |
| 2011 | 3000mSt | 8:53.04 | - | Apr 24, 2011 | ↑ | Kobe (JPN) |
| 2011 | 10000m | 28:54.53 | - | Nov 19, 2011 | ↑ | Yokohama (JPN) |
| 2011 | 20Kilometr | 1:01:33 | - | Oct 15, 2011 | ↑ | Tachikawa (JPN) |
| 2010 | 3000mSt | 8:47.94 | - | May 22, 2010 | ↑ | Tokyo (JPN) |
| 2010 | 10000m | 28:55.33 | - | Nov 20, 2010 | ↑ | Yokohama (JPN) |
| 2010 | 20Kilometr | 1:01:55 | - | Oct 24, 2010 | ↑ | Tokyo (JPN) |
2023
2 performances| Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|
Semi | 1:03:08 | - | Feb 12 | 51st Yamaguchi All-Corporate Half Marathon Championships |
Semi | 1:03:25 | - | Jan 29 | 2023 Osaka Half Marathon, Osaka Half Marathon Course, Osaka |
2022
14 performances| Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|
10000m | 28:27.13 | - | Nov 26 | Hachioji Long Distance Meeting, Gion Stadium, Machida |
10000m | 28:36.13 | - | Oct 8 | 23rd Chubu Business Group Championships, Hoshigadai Stadium, Tajimi |
5000m | 13:49.70 | - | Sep 25 | 70th All Japan Corporate Team Championships, Nagaragawa Stadium, Gifu |
3000mSt | 8:37.63 | - | Sep 24 | 70th All Japan Corporate Team Championships, Nagaragawa Stadium, Gifu |
1500m | 3:45.86 | - | Sep 17 | Two Laps Middle Distance Circuit, Komazawa Olympic Park Athletic Stadium, Tokyo - Elite Event |
3000mSt | 8:30.92 | - | Jul 15 | World Athletics Championships, Oregon 2022, Hayward Field, Eugene, OR |
3000mSt | 8:23.29 | - | Jun 11 | 106th Japan Championships, Yanmar Stadium Nagai, Osaka |
5000m | 13:32.38 | - | May 14 | 66th Chubu Corporate Teams T&F Championships, Nagaragawa Stadium, Gifu |
3000mSt | 8:29.24 | - | May 8 | Seiko Golden Grand Prix, National Stadium, Tokyo |
3000mSt | 8:34.72 | - | Apr 29 | Mikio Oda Memorial Athletics Meet, Municipal Stadium, Hiroshima |
5000m | 13:40.86 | - | Apr 2 | 34th Umemura Gakuen Competition, Chukyo Univ. Stadium, Toyota |
3000mSt | 8:27.74 | - | Mar 19 | Melbourne Track Classic, Lakeside Stadium, Melbourne |
3000m | 7:56.19 | - | Mar 12 | Sydney Track Classic, SOPAC, Sydney |
10000m | 28:52.46 | - | Feb 26 | 93rd Heisei Kokusai University Long Distance Competition, Athletics Stadium, Konosu |
2021
11 performances| Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|
10000m | 28:18.76 | - | Nov 27 | Long Distance Meeting, Kamiyugi Park Athletic Stadium, Hachioji |
10000m | 28:53.26 | - | Oct 8 | 22nd Chubu Business Group Championships, Tajimi |
5000m | 13:33.16 | - | Sep 26 | 69th All Japan Corporate Team Championships, Yanmar Stadium Nagai, Osaka |
3000mSt | 8:31.27 | - | Aug 8 | The XXXII Olympic Games |
3000mSt | 8:31.27 | - | Jul 30 | The XXXII Olympic Games |
3000mSt | 8:19.96 | - | Jun 26 | 105th Japan Championships, Yanmar Stadium Nagai, Osaka |
3000mSt | 8:19.96 | - | Jun 24 | 105th Japan Championships, Yanmar Stadium Nagai, Osaka |
5000m | 13:31.24 | - | May 16 | 65th Chubu Business Group Competition, Nagaragawa Stadium, Gifu |
3000mSt | 8:32.51 | - | May 15 | 65th Chubu Business Group Competition, Nagaragawa Stadium, Gifu |
3000mSt | 8:22.39 | - | May 9 | "READY STEADY TOKYO - Athletics" |
3000mSt | 8:26.52 | - | Apr 29 | Mikio Oda Memorial Athletics Meet |
2020
8 performances| Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|
3000mSt | 8:24.19 | - | Dec 4 | 104th Japan Championships |
10000m | 28:12.05 | - | Oct 9 | Chubu Area Corporate Teams Championships, Tajimi |
5000m | 13:35.65 | - | Sep 26 | 3rd Chukyo University Saturday Competition, Chukyo Univ. Stadium, Toyota |
5000m | 13:42.87 | - | Sep 20 | 68th All Japan Corporate Teams Championships, Prefectural Stadium, Kumagaya |
3000mSt | 8:25.34 | - | Sep 19 | 68th All Japan Corporate Teams Championships, Prefectural Stadium, Kumagaya |
3000mSt | 8:25.04 | - | Jul 18 | Hokuren Distance Challenge, Aoba Park Athletic Field, Chitose |
5000m | 13:51.95 | - | Jul 4 | 2nd Waseda University Competition, Mikio Oda Memorial Athletic Field, Tokorozawa |
3000mSt | 8:31.25 | - | Feb 23 | Sir Graeme Douglas International, Douglas Track & Field, Auckland |
2019
15 performances| Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|
3000mSt | 8:31.37 | - | Sep 22 | 67th All Japan Corporate Team Championships, Yanmar Stadium Nagai, Osaka |
5000m | 13:52.04 | - | Sep 22 | 67th All Japan Corporate Team Championships, Yanmar Stadium Nagai, Osaka |
3000mSt | 8:31.37 | - | Sep 21 | 67th All Japan Corporate Team Championships, Yanmar Stadium Nagai, Osaka |
3000mSt | 8:49.00 | - | Jul 22 | Hokuren Distance Challenge |
3000mSt | 8:38.70 | - | Jun 30 | 103rd Japan Championships |
3000mSt | 8:44.86 | - | Jun 30 | 103rd Japan Championships |
3000mSt | 8:44.86 | - | Jun 29 | 103rd Japan Championships |
3000mSt | 8:38.70 | - | Jun 27 | 103rd Japan Championships |
3000mSt | 8:41.20 | - | May 19 | Seiko Golden Grand Prix, Yanmar Stadium Nagai, Osaka |
1500m | 3:53.41 | - | May 11 | 63nd Chubu District Corporate Teams Championships, Gifu |
5000m | 13:48.68 | - | May 4 | Golden Games, Nobeoka |
3000mSt | 8:47.07 | - | Apr 23 | Asian Athletics Championships, Doha |
3000mSt | 8:47.07 | - | Apr 21 | Asian Athletics Championships, Doha |
3000mSt | 8:49.09 | - | Apr 7 | Australian Championships |
CrossCount | 35:04 | - | Mar 30 | 43rd IAAF World Cross Country Championships, Århus |
Showing 1 - 50 of 124
Honours
🥇
2020104th Japan Championships
3000 Metres Steeplechase
5
2019Asian Athletics Championships
3000 Metres Steeplechase
5
2019Asian Athletics Championships
3000 Metres Steeplechase
5
2017Bhubaneshwar Asian Championships
3000 Metres Steeplechase
5
2017Bhubaneshwar Asian Championships
3000 Metres Steeplechase
FAQ
Frequently asked questions
What is Kosei Yamaguchi's 3000 m steeplechase personal best?
Kosei Yamaguchi's 3000 m steeplechase personal best is 8:19.96, set on Jun 26, 2021 in Yanmar Stadium Nagai, Osaka (JPN), #365 on the all-time list.
Which events does Kosei Yamaguchi compete in?
Kosei Yamaguchi competes in the 3000 m steeplechase and 10 000 m.
How did Kosei Yamaguchi perform in 2023?
2023 season best: 1:03:08, set on Feb 12, 2023 in Ishin Me-Life Stadium, Yamaguchi (JPN). Last competition: 51st Yamaguchi All-Corporate Half Marathon Championships on Feb 12, 2023, 1:03:08.