Seina Shirai

JapanJapanActive
Born
Nov 4, 2007 (19 years old)
Events
400 m

Seina Shirai is a Japan sprinter, born on November 4, 2007. She competes primarily in the 400m and 400mH.

Her personal bests include 58.25 in the 400m and 1:03.18 in the 400mH. She is currently active on the international athletics circuit, representing Japan.

Personal best · 400 m58.25
2026 season best60.46Jun 19, 2026 · Athletic Field, Kitakami
2026 season best
Last competition48th All North-Japan Inter University Track and Field ChampionshipsJun 19, 2026 · 60.46
48th All North-Japan Inter University Track and Field Championships

As of Nov 15, 2026: 400 m 58.25, 2026 season best 60.46 (Jun 19, 2026, Athletic Field, Kitakami (JPN)) · Last competition: 48th All North-Japan Inter University Track and Field Championships, Jun 19, 2026, 60.46 · 19 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
400mNiigata 2025Japan 400 m all-time list58.25897 pts–
400mHNiigata 2025Japan 400 m hurdles all-time list1:03.18931 pts–

Progression

SeasonDisciplineResultWindDateCompetitions
2026400m 60.46–Jun 19, 202648th All North-Japan Inter University Track and Field Championships
2025400m 58.25–May 30, 2025Niigata Pref High School meeting, Denka Big Swan Stadium, Niigata
2025400mH 1:03.18–May 31, 2025Niigata Pref High School meeting, Denka Big Swan Stadium, Niigata
2024400mH 1:03.74–Oct 26, 202429th Hokushinetsu High School Rookie Track & Field Competition
FAQ

Frequently asked questions

Seina Shirai's 400 m personal best is 58.25, set on May 30, 2025 in Denka Big Swan Stadium, Niigata (JPN).

Seina Shirai competes in the 400 m.

2026 season best: 60.46, set on Jun 19, 2026 in Athletic Field, Kitakami (JPN). Last competition: 48th All North-Japan Inter University Track and Field Championships on Jun 19, 2026, 60.46.