Kano excluded techniques that could not be practiced full force, it wasn't about sport, it was about Randoi practice.I'm not sure about that. I'm just about martial arts and my guess there's a sport side and self-defense side of things for judo. Most people see the sports side of things for judo. Martial art in general wants to end the fight as soon as possible so there's a lot of throws that would increase the chance of hitting the head on the ground. But those throws would be banned in sports judo.