- Born:19 December 1998 (18 years)
Japanese judoka Genki Koga became World Cadet Champion in 2015 in Sarajevo. Genki is the son of 1992 Olympic champion and three-time world champion Koga Toshihiko.
Competitions - Medal overview B S G
- Continental Championships Juniors 001
- World Championships Cadets 001
- European Cup Juniors 001
- European Cup Cadets 001
- National Championships Cadets 001