She plays on the LPGA of Japan Tour where she won three of the first five tournaments of the 2022 season.

[2] Saigo was born in Funabashi in Greater Tokyo and won the Japan Women's Amateur Championship in 2019.

[3][4] She turned professional and joined the LPGA of Japan Tour in 2020.

[2] In the 2022 season, she recorded three wins and two second place finishes in the first six tournaments, after which she rose to 18th in the Women's World Golf Rankings.

[5] Saigo has endorsement deals with Mizuno Golf, Shimadzu, Fila & GS Yuasa ^Tournament shortened due to adverse conditions.