Judoka as Olympic Flag Carriers

I don't know why I watched the Olympic opening ceremonies last night, but I discovered something surprising — an amazing number of countries chose judoka for their flag carriers:

Georgia - Zurab ZVIADAURI (men's -90kg)
Gabon - Melanie ENGOANGUE (women's -78kg)
Indonesia - Krisna BAYU (men's -90kg)
Iraq - Hadir LAZAME (men's over 100kg)
Iran - Arash MIRESMAELI (men's -66kg) or/and Seyed Mahmoudreza MIRAN FASHANDI (men's over 100kg)
Spain - Isabel FERNANDEZ (women's -57kg)
Israel - Ariel ZEEVI (men's -100kg)
Kazakhstan - Askhat ZHITKEYEV (men's -100kg)
Canada - Nicolas GILL (men's -100kg)
Costa Rica - David FERNANDEZ (men's -60kg)
Great Britain - Kate HOWEY (women's -70kg)
Mongolia - Damdinsuren NYAMKHUU (men's -81kg)
Niger - Abdou ALASSANE DJI BO (men's -66kg)
Netherlands - Mark HUIZINGA (men's -90kg)
Hungary - Antal KOVACS (men's -100kg)
Uzbekistan - Abdullo TANGRIEV (over 100kg)
Portugal - Nuno DELGADO (men's -81kg)
Fiji - Naisiga RASOKISOKI (women's -78kg)