The story behind his fencing is even better. They wanted him to use a katana, but he didn't want to be a stereotype. So he said "no, I know how to fence. Let's do that, so I actually know what I'm doing."
He didn't know how to fence.
So, he learned in about a week, and found that he actually really enjoyed it. Theoretically, he still practices fencing and even competes.
George Takei is a national treasure.