Judo legend Koga Toshihiko, renowned for his supreme mastery of the Ippon-seoi-nage throwing technique, passed away in March aged just 53. Koga made a name for himself in the judo world with his precise, controlled technique and beautifully executed throws. Smaller than many of his international opponents, Koga won fans with a bold, aggressive approach that brought him huge success. On retiring from competition, he went into coaching, becoming a major influence on new generations of Japanese judoka. We examine his remarkable skills, his passion for judo, and the legacy he has left behind.