Tatsuya Ishii

JapanJapan
Born
Oct 30, 2004 (22 years old)
Events
Half Marathon

Tatsuya Ishii is a Japan long-distance runner, born on October 30, 2004. He competes primarily in the 5000m, Semi and 5Kilometre.

His personal bests include 14:53.33 in the 5000m, 1:06:06 in the Semi and 14:46 in the 5Kilometre. He is currently active on the international athletics circuit, representing Japan.

Personal best · Half Marathon1:06:06
2025 season best1:06:06Oct 18, 2025 · Showa Kinen Park, Tachikawa
2025 season best
Last competition20th Setagaya 246 Half Marathon, TokyoNov 9, 2025 · 1:07:11
20th Setagaya 246 Half Marathon, Tokyo

As of Nov 14, 2026: Half Marathon 1:06:06, 2025 season best 1:06:06 (Oct 18, 2025, Showa Kinen Park, Tachikawa (JPN)) · Last competition: 20th Setagaya 246 Half Marathon, Tokyo, Nov 9, 2025, 1:07:11 · 22 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
5000mYokohama 2022Japan 5000 m all-time list14:53.33830 pts–
SemiTachikawa 2025Japan Half Marathon all-time list1:06:06954 pts–
5KilometreTokyo 202514:46–

Progression

SeasonDisciplineResultWindDateCompetitions
20255Kilometre 14:46–Apr 13, 2025Adidas Tokyo City Run
2025Semi 1:06:06–Oct 18, 2025The 102nd Hakone Ekiden Qualifying Meet, Showa Kinen Park, Tachikawa
2024Semi 1:08:39–Apr 28, 2024Gifu Half Marathon
20225000m 14:53.33–Apr 24, 2022NITTAIDAI Athletic Stadium, Yokohama (JPN)
20215000m 14:57.36–Dec 5, 2021NITTAIDAI Athletic Stadium, Yokohama (JPN)
FAQ

Frequently asked questions

Tatsuya Ishii's Half Marathon personal best is 1:06:06, set on Oct 18, 2025 in Showa Kinen Park, Tachikawa (JPN).

Tatsuya Ishii competes in the Half Marathon.

2025 season best: 1:06:06, set on Oct 18, 2025 in Showa Kinen Park, Tachikawa (JPN). Last competition: 20th Setagaya 246 Half Marathon, Tokyo on Nov 9, 2025, 1:07:11.