Heart of an Assassin

You bow your head to the samurai. "I am willing to go through with it," you say. "I understand that it will be difficult and probably dangerous. But nothing is worth anything unless you work for it."

From the expression on the older samurai's face, you can see that he understands what you mean. He bows to you. "You may address me as Master Kalem."

You return the bow. "Yes, Master Kalem."

"Good. You are a fast learner." Kalem walks over to one of the far walls, and takes down a sheathed katana, which he hands to you. He then takes down another one, which he holds against his side. "Now, try to hit me."

You blink, confused, but know that you'd better do as he says.

Where are you going to attack him from?