Chiaki Ishikawa (石川智晶, previously 石川知亜紀 before 2005, born March 29, 1969) is a Japanese singer/songwriter. Her music career began as the vocalist of the duo See-Saw with keyboardist/composer Yuki Kajiura (梶浦由記). Following See-Saw's indefinite hiatus in 2005, she became a solo artist. She has performed numerous theme songs for anime including 美しければそれでいい (Utsukushikereba sore de ii), the opening theme of Simoun, and アンインストール (Uninstall), the opening to Bokurano. In addition to these, she has also released five solo albums, the most recent of which (この世界を誰にも語らせないように) was released in 2012.