Samurais are gaining popularity over Japan.  A documentary crew is interviewing some of them including Bokuden-chan, the strongest swordsman, but when the film comes out.  The Samurai Girls have a new problem to deal with.
Why do you teach people to use them?
¿por qué la enseña?
¿por qué la enseñas?
Por que você ensina pessoas a usá-las?