LOS ANGELES — Just exactly who is this Ken Tanaka character generating buzz on YouTube?

He seems to bear an uncanny resemblance to one David Ury, a Los Angeles-based improvisational actor who in the 1990s worked and studied in Tokyo but now takes small acting roles in Hollywood and was recently seen on the TV show "Heroes."

However, on his YouTube channel "helpmefindparents," Ken Tanaka says he is a 35-year-old Caucasian man adopted by Japanese parents and raised in Shimane Prefecture. Tanaka's numerous clips on the YouTube video-sharing site document his search in the U.S. for his biological parents, Jonathan and Linda Smith.