Isao Aoki is a Japanese professional golfer who has been playing on the Japan Golf Tour since 1971. He has won over 80 tournaments, including three major championships, and is considered one of the greatest players in the history of Japanese golf. He was inducted into the World Golf Hall of Fame in 2004. Aoki is also known for his distinctive swing, which has been described as 'butterfly-like' due to its graceful and fluid motion.