Mina was born on March 24, 1997, in San Antonio, Texas to Japanese expatriate parents Sachiko (née Terao) and Akira Myoi.

[4][18][19] In 2015, Mina participated in the South Korean reality television show Sixteen, created by JYP Entertainment and co-produced by Mnet.

[22] On July 11, 2019, JYP Entertainment announced that Mina would sit out the remainder of the Twicelights World Tour due to her extreme anxiety and insecurity regarding onstage performances.

[27] On February 9, 2023, JYP announced that Mina, alongside bandmates Sana and Momo, will officially debut in Japan on July 26 as a sub-unit named MiSaMo with the extended play titled Masterpiece.

[28] Prior to the trio's debut, on January 25, they released the track "Bouquet" as part of the soundtrack of TV Asahi's drama series Liaison: Children's Heart Clinic [ja].

[35][36][37] In August 2024, Mina was announced as the Japan ambassador of French luxury jewelry and watch house Boucheron.