In aikido class today the subject came up that edge hand cuts are based on sword techniques. This is probably a topic that was chewed to shreds years before I joined this Forum. It's just that I never saw anyone approach this particular set of moves. To my best if confused memory it went like this:
You are advancing with open hands and a right lead.
He grabs you same-side behind your right wrist.
You bring your right side back slightly to absorb his attack.
Then you step forward right raising your wrist to vertical, palm facing him.
Your pressing on his palm and wrist forces his left elbow straight up.
His balance is spoiled.
You twist your hips to the left and cut down and left with both hands (like a sword cut)
He goes flying.
I keep telling myself there is no room among all these hands for any long weapon sticking out beyond your own hands