Keito Kumai

JapanJapanActive
Born
Aug 23, 2004 (22 years old)
Events
Half Marathon

Keito Kumai is a Japan middle-distance runner, born on August 23, 2004. He competes primarily in the 1500m, 5000m and Semi.

His personal bests include 3:52.10 in the 1500m, 14:26.61 in the 5000m, 1:02:25 in the Semi and 14:28 in the 5Kilometre. He is currently active on the international athletics circuit, representing Japan.

Personal best · Half Marathon1:02:25
2026 season best1:04:31Nov 8, 2026
2026 season best
Last competition21st Setagaya 246 Half MarathonNov 8, 2026 · 1:04:31
21st Setagaya 246 Half Marathon

As of Nov 13, 2026: Half Marathon 1:02:25, 2026 season best 1:04:31 (Nov 8, 2026) · Last competition: 21st Setagaya 246 Half Marathon, Nov 8, 2026, 1:04:31 · 22 years old

Personal bests

WA points calculator →
DisciplineResultAll-time2026
1500mSagamihara 2025Japan 1500 m all-time list3:52.10951 pts––
5000mHiroshima 2022Japan 5000 m all-time list14:26.61913 pts–#917
SemiTokyo 2025Japan Half Marathon all-time list1:02:251,091 pts––
5KilometreTokyo 202414:28––

Progression

SeasonDisciplineResultWindDateCompetitions
20265000m 13:56.35–Jun 28, 202619th Kizuna Record Challenge Games, Machida GION Stadium, Tokyo
2026Semi 1:04:31–Nov 8, 202621st Setagaya 246 Half Marathon
20251500m 3:52.10–May 8, 2025The 104th Kanto Inter-University Track＆Field Championships, Gion Stadium, Sagamihara
2025Semi 1:02:25–Nov 9, 202520th Setagaya 246 Half Marathon, Tokyo
20245Kilometre 14:28–Feb 23, 2024ADIZERO 5K Special Race
2024Semi 1:04:53–Mar 10, 202427th All Japan University Men's Half Marathon Championship
20231500m 3:54.76–Apr 21, 2023All Japan University Track & Field Challenge
20235000m 14:54.69–Jun 2, 2023Japanese U20 Championships
FAQ

Frequently asked questions

Keito Kumai's Half Marathon personal best is 1:02:25, set on Nov 9, 2025 in Tokyo (JPN).

Keito Kumai competes in the Half Marathon.

2026 season best: 1:04:31, set on Nov 8, 2026. Last competition: 21st Setagaya 246 Half Marathon on Nov 8, 2026, 1:04:31.