What would you do if you were suddenly assaulted on the street? Could you defend yourself even if the attacker had a knife?
Though Tetsundo Tanabe is a master of several kinds of martial arts and the president of a security company, he insists it would be difficult for anyone to fight off an armed attacker empty-handed.
"However strong you may be, and however weak the attacker looks, you'd better run away," he says. "I would do so with no hesitation."