Let's see...you should try to remember that your sword is a defense as much as it is a weapon. It's better for an oncoming attack to strike your blade than to strike you, obviously.

[He lightly took Yuuri's wrist to adjust her stance again, raising the sword a little higher to leave her guard a little less open.]

So when you bring it back after swinging it, be sure you've not left yourself open to a counter.