Koki Nagai

Koki Nagai

JapanJapanActive
Born
Dec 18, 1995 (30 years old)
Events
Decathlon · 100 m

Koki Nagai is a Japan sprinter, born on December 18, 1995. He competes primarily in the 100m, 400m and 1500m.

His personal bests include 10.99 in the 100m, 52.64 in the 400m, 4:58.10 in the 1500m, 15.05 in the 110mH and 1.90 in the HJ. He is currently active on the international athletics circuit, representing Japan.

Personal best · Decathlon6772
2026 season best1.75Jul 18, 2026
2026 season best
Personal best · 100 m10.99
Last competition99th Hokkaido Athletics ChampionshipsJul 18, 2026 · 11.67
99th Hokkaido Athletics Championships

As of Oct 28, 2026: Decathlon 6772, 100 m 10.99, 2026 season best 1.75 (Jul 18, 2026) · Last competition: 99th Hokkaido Athletics Championships, Jul 18, 2026, 11.67 · 30 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
100mSagamihara 201810.99889 pts–
400mTokyo 202452.64709 pts–
1500mTokyo 20244:58.10307 pts–
110mHSagamihara 201915.05885 pts–
HJSagamihara 20181.90827 pts–
PVSagamihara 20183.80674 pts–

Progression

Compare me
SeasonDisciplineResultWindDateCompetitions
2026HJ 1.75–Jul 18, 202699th Hokkaido Athletics Championships
2026LJ 5.98+2.2Jul 18, 202699th Hokkaido Athletics Championships
2026SP 11.55–Jul 18, 202699th Hokkaido Athletics Championships
2026100m 11.67+1.1Jul 18, 202699th Hokkaido Athletics Championships
2026110mH 15.64+0.5Jul 18, 202699th Hokkaido Athletics Championships
2026400m 56.58–Jul 18, 202699th Hokkaido Athletics Championships
2025HJ 1.73–Apr 25, 202588th Tokyo Athletics Open Championships
2025PV 3.60–Apr 26, 202588th Tokyo Athletics Open Championships
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FAQ

Frequently asked questions

Koki Nagai's Decathlon personal best is 6772, set on May 25, 2018 in Sagamihara (JPN).

Koki Nagai competes in the Decathlon and 100 m.

2026 season best: 1.75, set on Jul 18, 2026. Last competition: 99th Hokkaido Athletics Championships on Jul 18, 2026, 11.67.