how do i find a friend on facebook who lives in japan?

[Kimberly]

so Japanese high school students came to visit schools in america and we got chosen as one of them. I'm very into Japanese culture and everything so I volunteered to show the students around. There, I met this girl and we instantly became friends she gave me her name so we could add each other on Facebook, but now that i look her up i cant find her. I think maybe because she has her name written in Japanese? i don't know how to write her name in Japanese so is there anyway i could find her? Is it because she lives in Japan? thank you for helping