Sachi Tainaka (タイナカ彩智, Tainaka Sachi, born April 30, 1986) is a Japanese singer who is best known for her vocals in the opening songs of the anime version of Fate/stay night. She has a 3½-octave vocal range. Although her name was written in katakana, her birth name is written in kanji. However, as of December 2010, she chose to write her first name in Kanji.