Coupling

That post just before? Check this, specially after the first minute.

Now, KJKB throws aren't like this, it comes with, er, tendering your opponent beforehand. But. There are two ideas in those videos that jump to you... Three, sorry. One is thoroughness, decission. That takedown IS going to work, IS going to take him down. Another is adhesion. Once Tori gains contact, he keeps it; well, contact and thrust. And that's the third one, continuity. Once you start, you only stopo when it's really over.

Check for that in the "jujitsu" video. Adhesion? Decission or forwardness? Continuity?

And it's not the techniques' fault. You could put those elements in most of them. Put them back, likely. But they're not there. Another level, and something I was actually teaching some weeks ago:

First, become acquainted with force couples. Now, sadly, shed a bit of the proper definition. Do we agree that moving an old, unassisted, driving wheel (Or a valve actuator, or...) is best done with two hands? Separated, one pushing and the other pulling? Moving someone else's body works the same way. Call it scissoring, call it how you will, if I push one of your shoulders and I pull the other one, it's much easier to move you than if I push with both hands in the same place. And MUCH better than a single hand. If I push your shoulders back, it's much better if I pull your feet forward. Yes? It's called o soto gari.

Most judo, and equivalent, has this in spades. Ippon seoi nage (arm and hip), harai goshi (arm and leg), kata guruma... You name it.

Check, in the longish video in last post, how many times this is NOT there. Check how many times it IS in the video in my first paragraph here. Ponder. Take care.