Kosei Yamaguchi

Kosei Yamaguchi

JapanJapan
Born
Aug 19, 1991 (35 years old)
Events
3000 m steeplechase · 10 000 m

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.

Personal best · 3000 m steeplechase8:19.96
#365 all-time
2023 season best1:03:08Feb 12, 2023 · Ishin Me-Life Stadium, Yamaguchi
2023 season best
Personal best · 10 000 m28:12.05
Last competition51st Yamaguchi All-Corporate Half Marathon ChampionshipsFeb 12, 2023 · 1:03:08
51st Yamaguchi All-Corporate Half Marathon Championships

As of Nov 6, 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

Personal bests

WA points calculator →
DisciplineResultAll-time
1500mTokyo 2022Japan 1500 m all-time list3:45.861,030 pts–
3000mSydney 2022Japan 3000 m all-time list7:56.191,079 pts–
5000mGifu 2021Japan 5000 m all-time list13:31.241,098 pts–
10000mTajimi 2020Japan 10 000 m all-time list28:12.051,114 pts–
SemiYamaguchi 2023Japan Half Marathon all-time list1:03:081,064 pts–
3000mStOsaka 2021Japan 3000 m steeplechase all-time list8:19.961,167 pts#365

Progression

Compare me
SeasonDisciplineResultWindDateCompetitions
2023Semi 1:03:08–Feb 12, 202351st Yamaguchi All-Corporate Half Marathon Championships
20221500m 3:45.86–Sep 17, 2022Komazawa Olympic Park Athletic Stadium, Tokyo (JPN)
20223000m 7:56.19–Mar 12, 2022Sydney Track Classic, SOPAC, Sydney
20223000mSt 8:23.29–Jun 11, 2022106th Japan Championships, Yanmar Stadium Nagai, Osaka
20225000m 13:32.38–May 14, 2022Nagaragawa Stadium, Gifu (JPN)
202210000m 28:27.13–Nov 26, 2022Gion Stadium, Machida (JPN)
20213000mSt 8:19.96–Jun 26, 2021105th Japan Championships, Yanmar Stadium Nagai, Osaka
20215000m 13:31.24–May 16, 2021Nagaragawa Stadium, Gifu (JPN)
Compare me with Kosei Yamaguchi
FAQ

Frequently asked questions

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.

Kosei Yamaguchi competes in the 3000 m steeplechase and 10 000 m.

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.