gender of the name "Chizuru"

So in an anime there's this girl named Chizuru who is supposedly going around disguised as a boy. However, she doesn't even bother to use an alias and goes by her normal name.

Now, from what I can tell (appearance, attitude of other characters to her) the male disguise is basically paper-thin. However, I'd like to know exactly how paper-thin it is...so my question is, is there any conceivable way at all that "Chizuru" could be mistaken for a male name?

(If the answer is "no way," I won't be surprised... -_-)