Hope it is OK just to add my thoughts here.........
Regrading Empi and the postabout possible applications:
I teach it as a combination that starts with :
1) Standing in front of the opponent (with a realistic close distance). The hand coming up and striking (anywhere in the face, the rising knee can be a strike to the groin (if the distance is right)followed by dropping with bent knees with a fist strike to the groin. The hand that comes around the neck is actually grabbing someone into you.
We now have the classic empi stance, where we are facing front, bent knees with a low fist and the other arm wrapped around our necks.
When, you turn into the rear gedan bari, the opponent simply is thrown over the rear leg.
The "rear" gedan gbari is simply where his head will be and the trapping of your other arm is just entrapping the opponents other arm and breaking it .....
Not a pretty throw but, very effective. I think the Judo guys call it Tiatoshi.