D. J. Kaori found success spinning records in New York, and her rise has inspired others yearning to shun traditional Japanese roles. Credit...Nathan Shanahan/WireImage AT the Terminal 8 food court of Kennedy International Airport, over a breakfast of Coca-Cola and greasy Chinese noodles, Miho Mimura slipped her hand into her new American boyfriend’s and the tears started to flow. “I’m sad, I don’