Riko Yamakoshi

Riko Yamakoshi

JapanJapanActive
Born
Mar 13, 2004 (22 years old)
Events
200 m · 100 m

Riko Yamakoshi is a Japan sprinter, born on March 13, 2004. She competes primarily in the 100m, 200m and 400m.

Her personal bests include 11.79 in the 100m, 23.81 in the 200m, 55.38 in the 400m, 45.13 in the 4x100m and 3:37.65 in the 4x400m. She is currently active on the international athletics circuit, representing Japan.

Personal best · 200 m23.81
2026 season best26.71Apr 26, 2026 · Komazawa Olympic Park Athletic Stadium, Tokyo
2026 season best
Personal best · 100 m11.79
Last competition89th Tokyo Athletics Open ChampionshipsApr 26, 2026 · 26.71
89th Tokyo Athletics Open Championships

As of Nov 8, 2026: 200 m 23.81, 100 m 11.79, 2026 season best 26.71 (Apr 26, 2026, Komazawa Olympic Park Athletic Stadium, Tokyo (JPN)) · Last competition: 89th Tokyo Athletics Open Championships, Apr 26, 2026, 26.71 · 22 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
100mYokohama 2022Japan 100 m all-time list11.79*1,034 pts–
200mSagamihara 2023Japan 200 m all-time list23.81*1,054 pts–
400mHiratsuka 2023Japan 400 m all-time list55.38999 pts–
4x100mKawasaki 2024Japan 4 × 100 m all-time list45.13–
4x400mKumagaya 2023Japan 4 × 400 m all-time list3:37.65–
60mIndoorOsaka 20217.81954 pts–

* Wind-assisted (> 2.0 m/s)

Progression

Compare me
SeasonDisciplineResultWindDateCompetitions
2026200m 26.71+0.1Apr 26, 202689th Tokyo Athletics Open Championships
2025100m 12.40+1.1Jun 5, 202594th Japan Inter-University Athletics Championships
2025200m 24.75+0.5Aug 3, 2025Fuji Hokuroku World Trial 2025, Hokuroku Park Athletic Field, Fujiyoshida
20254x100m 46.24–Jul 12, 2025Japanese Relays Championships, Nagaragawa Stadium, Gifu
2024100m 12.18-2.9Jul 6, 2024The 100th WASEDA & KEIO Athletic Meet, Keio Univ. Hiyoshi Athletics Field, Yokohama
2024200m 24.42+0.2Jul 6, 2024The 100th WASEDA & KEIO Athletic Meet, Keio Univ. Hiyoshi Athletics Field, Yokohama
20244x100m 45.13–Sep 21, 202493rd Japan Inter-University Athletics Championships
20244x400m 3:38.53–Sep 22, 202493rd Japan Inter-University Athletics Championships
Compare me with Riko Yamakoshi
FAQ

Frequently asked questions

Riko Yamakoshi's 200 m personal best is 23.81, set on May 14, 2023 in Gion Stadium, Sagamihara (JPN).

Riko Yamakoshi competes in the 200 m and 100 m.

2026 season best: 26.71, set on Apr 26, 2026 in Komazawa Olympic Park Athletic Stadium, Tokyo (JPN). Last competition: 89th Tokyo Athletics Open Championships on Apr 26, 2026, 26.71.