(born 5 July 2002) is a Japanese professional golfer. She plays on the LPGA Tour and on the LPGA of Japan Tour where she has 6 wins.
Early life and amateur career Iwai was born in Saitama Prefecture and started playing golf at 8 years old. In 2019, she won the Junior Golf World Cup.
Professional career Iwai turned professional and joined the LPGA of Japan Tour in 2021. As a rookie she won a title on the developmental circuit, the Step-Up tour, and the JLPGA Rookies Championship.
She had her breakthrough in 2023 when she won three titles and finished second on the money list.
In 2024, she finished top-10 in two LPGA majors, and rose to 26th in the Women's World Golf Rankings.
In December 2024, Iwai earned her LPGA Tour card for 2025 by finishing T-5 at the LPGA Final Qualifying Tournament.
Personal life Her twin sister, Chisato, is also a professional golfer on the LPGA of Japan Tour.
Professional wins (9) LPGA Tour (1)
No.DateTournamentWinning scoreTo parMargin ofvictoryRunner-up117 Aug 2025The Standard Portland Classic67-67-64-66=264−244 strokes Gurleen Kaur
LPGA of Japan Tour wins (6) No.DateTournamentWinning scoreTo parMargin ofvictoryRunner(s)-up116 Apr 2023KKT Cup Vantelin Ladies Open67-70-72=209−71 stroke Lala Anai Mao Nozawa Jiyai Shin217 Sep 2023Sumitomo Life Vitality Ladies Tokai Classic63-68-70=201−151 stroke Sakura Koiwai324 Sep 2023Miyagi TV Cup Dunlop Women's Open Golf Tournament65-69-69=203−13 2 strokes Mao Saigo426 May 2024Resort Trust Ladies68 68-69-68=273−153 strokes Rio Takeda516 Jun 2024Nichirei Ladies71-68-64=203−131 stroke Sakura Koiwai Shuri Sakuma615 Sep 2024Sumitomo Life Vitality Ladies Tokai Classic70-66-64=200−161 stroke Miyū Yamashita
Step-Up Tour wins (1) No.DateTournamentWinning scoreTo parMargin ofvictoryRunner-up119 Sep 2021Sanyo Shimbun Ladies Cup70-66=136^−81 stroke Hanane Nagashima (a) ^Shortened to 36 holes due to weather
Other wins (1) No.DateTournamentWinning scoreTo parMargin ofvictoryRunner-up110 Dec 2021JLPGA Rookies Championship Kaga Electronics Cup69-71=140−4Playoff Kotoko Uchida
Results in LPGA majors Results not in chronological order. Tournament 2023 2024 2025 2026Chevron ChampionshipT30T44T21U.S. Women's OpenCUT74T45T45Women's PGA ChampionshipT32T29T19The Evian ChampionshipT10CUT3Women's British OpenT11T7T40T61
CUT = missed the half-way cut "T" = tied
Summary Tournament Wins 2nd 3rd Top-5 Top-10 Top-25 Events Cuts madeChevron Championship 0 0 0 0 0 1 3 3U.S. Women's Open 0 0 0 0 0 0 4 3Women's PGA Championship 0 0 0 0 0 1 3 3The Evian Championship 0 0 1 1 2 2 3 2Women's British Open 0 0 0 0 1 2 4 4Totals 0 0 1 1 3 6 17 15 Most consecutive cuts made – 9 (2023 Women's British – 2025 Women's PGA) Longest streak of top-10s – 2 (2024 Evian – 2024 Women's British)
Team appearances Amateur Junior Golf World Cup (representing Japan): 2019 (winners) Professional Hitachi 3Tours Championship (representing JLPGA): 2023 (winners)
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