Athletics (race walking) · Japan · AIU for World Athletics (Disciplinary Tribunal)

Koki Ikeda: doping case, ban and appeal

Cleared CAS found no anti-doping rule violation and reinstated him with immediate effect on 23 October 2026.^1,2

Violation

Use of a prohibited substance or prohibited method (World Athletics Anti-Doping Rule 2.2), alleged on the basis of abnormalities in his Athlete Biological Passport which World Athletics said indicated blood manipulation¹

Results disqualified

The CAS release does not address results

Appeals

• CAS, 23 October 2026: OverturnedCAS upheld his appeal, set aside the tribunal decision and found no anti-doping rule violation. The abnormal values were not disputed, but the panel found his alternative physiological explanation plausible and cited "very extensive evidence in support of his explanations". He was reinstated with immediate effect.^1,2

Sources

1. Court of Arbitration for Sport, CAS upholds appeal by Koki Ikeda (Japan), CAS media release 11292 (23 October 2026)
2. Reuters (via Flashscore), CAS clears Japan's Ikeda of doping violation and overturns four-year ban (23 October 2026)