While in the Super Dragonfly stance (spinning his sword like a helicopter far overhead), Yoshimitsu has an attack that is listed in the movelist as KK. All this does is the same thing as the normal K attack, except that he doesn't damage himself at the end and stays on his feet. This is much more useful than the standard version.
The problem is, I have no clue how to execute it. If I mash K as fast as I can, he always falls. The 2 or 3 times (out of 100 attempts in training mode) I've actually gotten this command to execute properly, I couldn't emulate it immediately afterwards.
What is the timing for the second press of K? There is also a just version of this attack as well, but I would be fine just being able to consistently execute the normal version without damaging myself.