Ishikawa was 6 years old when she joined the theatre company,
Himawari in
Osaka while commuting to school when she was a student. She appears in performances within the theatre company every year, and since coming to Tokyo, she has appeared in musical class performances and main performances. When she was in elementary school, Ishikawa entered the performance live, "Dream Quest" sponsored by the theatre company as a duo, and performed songs and dances. In 2007, she made her anime debut as Dianeira in the TV anime
Heroic Age. In 2014, she won the Best Actress in supporting roles at the
8th Seiyu Awards. On March 30, she held her first solo talk at Hotel New Otani Osaka in the same year. Ishikawa's official website was opened on November 27. In November 2016, the activity as "Trefle" was finished. Part of the live final and the feedback for each person was delivered on November 18, 2016, on Nico Nico Live Broadcasting "Second Shot Night" and "Trefle-TV" (final episode). In 2019, there was a dedicated official site "Yui Ishikawa official site", but the site was closed by the end of 2018. In the future, it will be written and announced on the TOP page of the office, the profile column, or the blog. On November 19, 2019, information on Ishikawa's solo project "UTA-KATA" was released. A music reading drama project planned by Shigeru Saito of Heart Company Co., Ltd., "Yui Ishikawa UTA-KATA Vol.1 ~ Dawn's Ginyu Poet ~" was held in 3 cities and 6 performances from January 11, 2020. Along with the piano performance by
Masumi Itō, the story was read aloud by Kana Akatsuki and the original song for this work was performed. On May 5, 2020, the mitt management submitted a damage report to the police because of the continuous threatening posts to "harm" Ishikawa herself, her family, and the office. A man who had posted an online threat on June 1, 2020, was arrested. On March 6, 2021, she won the Best Actress in a Leading Role at the
15th Seiyu Awards. In 2022, Ishikawa's second solo project "UTA-KATA" was released. "Yui Ishikawa UTA-KATA Vol.2 ~The Girl Who Sells Songs~" was held in 3 cities and 8 performances from September 10, 2022. ==Personal life==