Actor Watanabe Ken (43) headed off for Los Angeles yesterday to attend Sunday’s Golden Globe Awards, to be held at the Beverly Hilton Hotel. He is the first Japanese actor in 47 years to be nominated for an award. Watanabe co-starred alongside Tom Cruise and Sanada Hiroyuki in “The Last Samurai,” a fictional epic tale of honor lost and found in the early Meiji era. By coincidence, he shared first class with several of the cast of “Lord of the Rings,” in Japan on a PR trip. The final episode in that movie saga opens here on February 14.