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
It's definitely taken from a sword technique, maybe very stylized and such in Aikdio..but that's how i'd call it.
Practicality, I dunno decide for yourself.
If i'm understanding the technique right though..it is definitely a weapons thing, look up some Jujutsu videos or European martial arts stuff where they are actually holding swords..willing to bet if you looked hard enough you'd find it.
IMO most of AIkido is based on sword stuff, though it's been highly stylized, if you look at Daito Ryu or some old Koryu arts you can see the stuff it comes from.
Some sword stuff seems meant to happen when the people are stuck together and blades are not pointing directly out, not at blade range pointing at someone like a gaurd- maybe upwards or something?