Ryo Ishikawa (石川 遼; born 17 September 1991), also known by the nickname "Hanikami Ōji" (literally, "Bashful Prince"), is a Japanese professional golfer. On 20 May 2007, Ishikawa became the youngest winner ever of a men's regular tournament on the Japan Golf Tour by winning the Munsingwear Open KSB Cup at the age 15 years and 8 months.[2] He competed as an amateur and it was Ishikawa's first tour appearance. He finished one shot ahead of Japan's 9th top ranked player at the time, Katsumasa Miyamoto. The highest ranked player on the Official World Golf Ranking who took part in the event was Toru Taniguchi who finished T13, 6 shots shy of Ishikawa. Taniguchi ranked number 86 in the world after the event. Ishikawa turned professional in 2008 and won another Japan Golf Tour tournament, the mynavi ABC Championship. By the close of 2008 he had became the youngest ever player to reach the top 100 of the Official World Golf Rankings. Ishikawa was invited to play in the PGA Tour's Arnold Palmer Invitational at Bay Hill in 2009. His first PGA Tour event, however, is expected to be the Northern Trust Open at Riviera Country Club. He will also make a start on the PGA Tour the week before the Arnold Palmer Invitational at the Transitions Championship. On January 22, 2009, Ishikawa was invited to play in the 2009 Masters Tournament as one of International Invitees by the Augusta National Golf Club in Augusta, Georgia