Whitaker's broadcast journalism career began in 1979 at KQED in San Francisco, California. In 1982 Whitaker became a correspondent for WBTV in Charlotte, North Carolina. He moved to Atlanta, Georgia and covered politics from 1985 to 1989. He joined CBS News as a reporter in November 1984. He became the CBS News' Tokyo correspondent from 1989 to 1992. In November 1992 Whitaker moved to Los Angeles and became a CBS News correspondent there. In March 2014, Whitaker was made correspondent for the CBS news program 60 Minutes, for which he began reporting in the fall season. He formerly resided in Los Angeles with his wife and children, but will move his family to New York City with the position.
Question: How many years was he a Tokyo correspondent ?
Answer: 4