Japanese Name

I didn't know that my grandma gave me a Japanese name and guess what, she called me Fujiwara Yoshisaki, LOL! My dad told me about our Japanese ancestry, By the way my dad's full name is Carlos Y. (Y for Yoshisaki) Carlos II. So now I'm in sole searching about my family's lost heritage which has been originated from Japan (I got the chance to visit the country but never had the opportunity to researh or to find my lost ancestors). Well I hope and wish I have the money to pursue my quest in finding my lost family tree.