Diversion
Otsuka Sensei has a really cool behind the back kotegaeshi move. He looks one way and throws the person behind him with a kotegaeshi.
Several years ago I spent some time in pursuit of that technique and figured out how to do it.
Instead of giving everything away - which some of you frown upon :)...
I will give you the pieces to set you on your way.
In order to replicate that move you have to be able to do more than just kotegaeshi. You also have to know how to transfer a part of your mass into your opponent.
A simple kotegashi will not send the person flying thru the air, especially if you are doing it behind your back.
What is required is a subtle but effective mass transfer after you engage the initial kotegaeshi lock.
There is a long video on youtube. Go to almost the end - about 19:18.
Hiroshi Ikeda, 7th dan of Boulder Colorado Aikikai is demonstrating how he transfers his weight into the uke.
The uke grabs Ikeda Sensei's wrist and the uke crumbles.
http://www.youtube.com/watch?v=97R47-zk ... ture=share
More on Ikeda Sensei. Ikeda has been exploring internal power for the past several years and is able to manifest it in his techniques unlike most of the aikido population.
(Sidenote. Kazutaka Otsuka trained in aikido with Ikeda while he lived in the US. )
Ikeda shows how he easily transfers his mass into the extremities of his uke thus unbalancing him.
Now take that exact technique but instead of having someone grab you, apply a kotegashi to your uke and THEN transfer your mass into the uke's wrist.
Next thing you know you have a human projectile - or a broken wrist.
And that is what is happening in Otsuka Sensei's behind the back kotegaeshi.
Again, it's all internal stuff.
No magic. Just superior body control. Learning how to control your internal fascial tissues, muscles through intent is the key while maintaining Ten Chi Jin as you are fully connected and operating from your tanden.
There is kotegashi and then there is kotegaeshi. Huge difference. Which do you want to do? The answer for me is obvious.
P.S. In the video there is a bit of weight that is unaccounted for.
The reason for this I think is because the model is not static. Intent is like a flowing river.
There is acceleration. There is flow. So a quick acceleration in the transfer process can affect the variance in mass - I think.