|Born||31 January 1981|
|Height||1.77 m (5 ft 10 in)|
|Weight||74 kg (163 lb; 11.7 st)|
|College||Tohoku Fukushi University|
|Current tour(s)||Japan Golf Tour|
|Former tour(s)||PGA Tour|
|Highest ranking||63 (23 November 2014)|
|Number of wins by tour|
|Japan Golf Tour||3|
|Best results in major championships|
|PGA Championship||T21: 2015|
|The Open Championship||CUT: 2008, 2014, 2015|
Iwata was born in Sendai, Miyagi Prefecture, Japan. He started playing golf at the age of 14, by his father's influence, who ran a local golf range and was a professional golfer on the Japan Senior Tour. Iwata played college golf at Tohoku Fukushi University.
Iwata turned professional in 2004 and has played on the Japan Golf Tour since then. His first win came at the 2014 Fujisankei Classic. He also won the 2015 Shigeo Nagashima Invitational Sega Sammy Cup. In the second round of the 2015 PGA Championship at Whistling Straits, Iwata shot a 63, which matched the then lowest round in a major championship. Iwata played on the 2016 PGA Tour, having qualified through the 2015 Web.com Tour Finals, finishing 24th in the priority ranking.
Professional wins (3)
Japan Golf Tour wins (3)
|No.||Date||Tournament||Winning score||Margin of
|1||7 Sep 2014||Fujisankei Classic||−10 (69-69-70-66=274)||1 stroke||Hur In-hoi|
|2||5 Jul 2015||Shigeo Nagashima Invitational
Sega Sammy Cup
|−16 (70-69-67-66=272)||1 stroke||Shugo Imahira|
|3||2 May 2021||The Crowns||−12 (67-68-63=198)*||3 strokes||Katsumasa Miyamoto|
*Note: The 2021 Crowns was shortened to 54 holes due to weather.
Japan Golf Tour playoff record (0–2)
|1||2008||Fujisankei Classic||Toyokazu Fujishima||Lost to par on first extra hole|
|2||2014||Dunlop Phoenix Tournament||Hideki Matsuyama||Lost to par on first extra hole|
Results in major championships
|The Open Championship||CUT||CUT||CUT|
CUT = missed the half-way cut
"T" indicates a tie for a place
Results in World Golf Championships
Results not in chronological order before 2015.
"T" = tied
- "Week 47 2014 Ending 23 Nov 2014" (pdf). OWGR. Retrieved 29 October 2019.
- "Iwata cards 66 to win Fujisankei Classic". Fox News. Sports Network. 7 September 2014.
- Crouse, Karen (14 August 2015). "Hiroshi Iwata Ties a Record, Then Takes a Star Turn". The New York Times.
- Kelley, Brent. "Lowest Round in a Men's Golf Major, PGA Tour Records: Best 18-Hole Score in Major Championship". About.com. Retrieved 15 August 2015.
- "Heads of the class". PGA Tour. Retrieved 14 February 2016.
- Hiroshi Iwata at the Japan Golf Tour official site
- Hiroshi Iwata at the PGA Tour official site
- Hiroshi Iwata at the Official World Golf Ranking official site