Actress and model Sumire was born on July 15, 1990, in Tokyo. She is the eldest daughter of Junichi Ishida and Chiaki Matsubara, and moved to Hawaii at the age of seven. She debuted as a model in 2006 and appeared on television shows such as "Matsuken, Imachan, and Othello's GO!GO! Sata." In 2009, she entered Carnegie Mellon University's Drama Department. While there, she starred in university-sponsored musicals such as "Strange Snow" and "Shakespeare's Twelfth Night." However, due to a student ban on showbiz activities, she took a leave of absence in 2011 to pursue a full-time career in showbiz. Shortly after her debut, she guest-starred on the British vocal group Il Divo's album "WICKED GAME." She made her singing debut with the bonus track "Crying." In 2013, she released her major label debut single "Season in the Sun" and her second single "Tasogare no Begin." In 2014, she held her first live concert at Yamaha Hall.

Meanwhile, in 2012, she made her acting debut in the role of Chacha in the stage production "Saotome Taichi Special Performance," and in the same year appeared in the musical "tick, tick...BOOM!" written by Jonathan Larson. The following year, she played the heroine in the musicals "A Tale of Two Cities" and "Anything Goes," both performed at the Imperial Theater, and has been highly praised for her dancing skills and singing ability.

In addition to her entertainment activities, she has appeared on numerous television programs, including TBS's "Shin Chubo Desu yo!" and CX's "Viking." In 2013, she was appointed the new brand ambassador for Reebok Japan, embodying the healthy lifestyle that the brand advocates.