Kotaro Yamaguchi

JapanJapanActive
Born
Sep 10, 2005 (21 years old)
Events
Hammer Throw

Kotaro Yamaguchi is a Japan thrower, born on September 10, 2005. He competes primarily in the HT and HammerThro.

His personal bests include 55.03 in the HT and 54.99 in the HammerThro. He is currently active on the international athletics circuit, representing Japan.

Personal best · Hammer Throw55.03
2026 season best54.66Apr 18, 2026 · Nihon University Stadium, Tokyo
2026 season best
Last competitionThe 1st Nihon University CompetitionApr 18, 2026 · 54.66
The 1st Nihon University Competition

As of Nov 13, 2026: Hammer Throw 55.03, 2026 season best 54.66 (Apr 18, 2026, Nihon University Stadium, Tokyo (JPN)) · Last competition: The 1st Nihon University Competition, Apr 18, 2026, 54.66 · 21 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
HTTokyo 2025Japan Hammer Throw all-time list55.03817 pts–
HammerThroKofu 202354.99–

Progression

SeasonDisciplineResultWindDateCompetitions
2026HT 54.66–Apr 18, 2026The 1st Nihon University Competition
2025HT 55.03–Mar 23, 2025The 6th Nihon University Competition, Nihon University Stadium, Tokyo
2024HT 52.50–Jul 20, 2024The 4th Nihon University Competition
2023HammerThro 54.99–Jun 17, 2023Minami Kanto High school Meeting, JIT Recycled Ink Stadium, Kofu
FAQ

Frequently asked questions

Kotaro Yamaguchi's Hammer Throw personal best is 55.03, set on Mar 23, 2025 in Nihon University Stadium, Tokyo (JPN).

Kotaro Yamaguchi competes in the Hammer Throw.

2026 season best: 54.66, set on Apr 18, 2026 in Nihon University Stadium, Tokyo (JPN). Last competition: The 1st Nihon University Competition on Apr 18, 2026, 54.66.