Kentarō Shimizu (清水 健太郎, Shimizu Kentarō, born October 11, 1952 in Kokura, Fukuoka, Japan) is a Japanese actor and singer. Born Iwao Sonoda (園田 巌, Sonoda Iwao), he graduated from the Ashikaga Institute of Technology. He has been arrested several times, and served prison terms, for various offences, among others illegal drug use.