She made her professional debut in 2021. She won her first professional title on the JLPGA lower tour that same year, and in 2022, at the age of 19, she won two consecutive weeks on the JLPGA regular tour, for a total of four wins, two in 2023.Chisato Iwai is the twin sister of Akie Iwai, and they are playing on the JLPGA Tour as sisters. Like the Korda and Jutanugarn sisters, they are expected to play on the highest stage in the world.