Info about "Ikkyo video"
Ikkyo (first teaching), also known as ikkajo, is an Aikidp technique that sometimes uses control of the elbow to control the torso and body. It can also be used as a throw, by extending up into the elbow without then rolling it down. Ikkyo is a control using one hand on the elbow and one hand near the wrist which leverages uke to the ground. This grip also applies pressure into the ulnar nerve at the wrist.
In Ikkyo correct positioning of the hand over the elbow joint is essential. This can be studied by practicing the pin. Pressure should be applied just a bit on the shoulder-side of the elbow joint, pressing in at an angle with the tegatana part of the hand. (Note: in most applications, nage grabs the elbow and pushing into the elbow. However, even when grabbing, this is where the pressure should come from.) Push the elbow “the way it doesn’t bend.”
To correctly perform ikkyo, it is not enough to lock the elbow. A large, rolling-upwards motion (like a large-style sword cut) is important, to extend the control to the shoulder.