 Koga akambomira kuita judo kwenguva pfupi mushure mekukunda kwake kumaOlympics, asi akadzoka aine menduru yegoridhe paWorld Judo Championships muna 1995muChiba, kuJapan. Akatambura kukundwa kunoshamisa ne ippon mumutambo wekukodzera we 1996 Summer Olympics, asi akasarudzwa semumiriri zvakadaro nekuda kwechiitiko chake chekare mumitambo yeOlympic. Akapedza mutambo wake wechitatu weOlympics aine menduru yesirivha muchikamu che -78 kg. 