I must make an amendment to the above post. In the full heyday of full-contact Karate and American "Kickboxing" of the 70's Judo style throws were allowed. They had to be done off of a sweep, or right as a clinch is initiated. This clip here
is proof. Benny "The Jet" Urquidez absolutely flattens his opponent with a hane-goshi (curtousey of one "Judo" Gene LeBell whom Benny had trained under). The fight is ruled a no contest due to the fact that it was held under MT rules, and not Full Contact Karate rules.
It doesn't matter if you agree or disagree
... As long as I don't bore you and I spark a moment of thought, my goal is achieved
Queng leon queng tigre ecu tacacut, queca pa? - Pampangan Mandarigma Motto