I know what it means, why it is practical and how to do it...as well as how to fail in just trying to mimic it.
I have seen a few Japanese Aikido Shihan display it and never tell anyone what they were doing or how they could do it too. I both explain and teach it at every seminar.

It is yet again another example of what the vast majority in Aikido do not know about the teachings of their founder and what they thought was spiritual, turns out to be foundational and incredibly practical-with weapons and without.
Dan