If a student is properly trained in ukemi, the decision as to whether or not to take a breakfall at all usually belongs to uke, not nage ...
I sometimes read this opinion in this forum. (Never heard it in one of the german forums I visit.) And everytime, it amazes me because this view doesn't seem to match my/our practice. Or I don't really understand something.
In our teaching there are just different versions of each throw. We teach how to throw in a way which allows uke to fall backward or to roll. And we teach a different version which doesn't allow this, but leads uke into a high fall. There is no jumping of uke, but uke is led into the movement by nage.
I'll try to explain my questions with the example of irimi nage:
You can throw "outwards", away from you. In thist version the throwing arm and the leg which is in front, are aligned in the same direction. So if uke is thrown with the left arm, this left arm and the left leg are kind of parallel and are direct "forward", teh arm also more or less down.
This is an exampel of what I mean.
Uke can mostly decide how to fall. Even if this version is executed sharper, uke may have the oportunity to decide how to fall.
The other version is shown here.
The throwing leg is moving in the direction of ukes center, the throwing arm is moving in front of the center of tori. Arm and leg are no more parellel but are moving in different directions. The leg and hip of tori are blocking ukes way, so he can't roll (forward or backward) but is led by toris arm over the leg/hip. He has to somehow get over it. Also the throw doesn't lead uke away from tori, but the throwing arm ist closing in and uke is led right "between tori feet". He is led vertically down.
In every nage waza we have different ways of doing it which are comparable to the two different forms I tried to describe.
What am I getting wrong?