So this is the multi gaku suki, or a multi gaku with a punch.
Great. So again, the important thing to remember here is that as this comes in you want to be moving off to the side and opening this up here. As I take the wrist and thumb joint, I'm doing my. From the outside. As he grabs me I secure here, and then, as he comes for the punch, you turn the spine and extend this. Then I do my 45 degree movement. Both of my hands are locking this wrist out.
This is a multi gaku suki.