Height: 1.75 m (5 ft 9 in)
Weight: 72 kg (159 lb)
Birthday: 17 September 1991
Year turned pro: 2008
Birthplace: Matsubushi, Saitama, Japan
Ishikawa was born in Matsubushi, Saitama, Japan, in 1991. He was still just fifteen when he achieved a win at the Munsingwear Open KSB Cup on the Japan Golf Tour. He was the youngest winner of an event on the tour, in what was his first tour appearance. In 2008, Ishikawa turned professional and went on to win on the Japan Golf Tour again, at the mynavi ABC Championship. At the end of that year Ishikawa entered the top 100 of the World Rankings; the youngest person to complete this achievement.
In 2009, Ishikawa played on the PGA Tour for the first time. That same year, Ishikawa was successful in winning the Gateway to the Open Mizuno Open Yomiuri Classic which meant that he qualified to play in the Open Championship. During that year, Ishikawa won four events on the Japan Golf Tour, and entered the World Top 50. His achievements were recognized at the Japan GTO awards, where he was the recipient of nine separate titles.
The following year, at the US Open Ishikawa really caught the eye when he competed wearing an outfit colored bubble gum pink. He also played well at the start of the tournament, before falling away.
The following year, Ishikawa decided to donate all of his winnings from the Tour, as well as ¥ 100,000 for every birdie he made, to Japan earthquake relief.
Ishikawa became a member of the PGA Tour in 2012. During 2013, he made the cut in 13 out of the 23 events he played. He retained his PGA Tour card at the Web.com Tour finals. During the 2014 PGA Tour season, Ishikawa finished in the top 25 on nine occasions and achieved one second place finish, at the Shriners Hospitals for Children Open, as well as a tie for fifth place at the Honda World Cup of Golf.
As of the end of 2014, Ishikawa was yet to achieve a win on the PGA Tour, but had amassed total prize money of $2,851,204.