Probably that's your REAL Japanese name for it might be your true identity or ethnicity.
I find it hard to believe any full Chinese name can be completely converted to a Japanese one. There is no pronunciation for WANG in Japanese, therefore use " OH " as comparable translation.
My Chinese first name means " love " as in " AI " for my actual romanized name,I can use AIKO as a Japanese substitute but my family LAU ( LIU in Mandarin ) has no meaning and there is no Japanese pronunciation for it so there wouldn't be any matching multiple-syllabic Japanese last name.