See-Saw (formed in 1993) is a Japanese female pop/rock duo (formerly a trio) originally from Tokyo, Japan consisting of 石川智晶 (Chiaki Ishikawa) (lead vocals) and 梶浦由記 (Yuki Kajiura) (back-up vocals, keyboards). A former member was 西岡由紀子 (Yukiko Nishioka) who left the group in early 1994 to pursue a writing career. The duo of Ishikawa and Kajiura are responsible for the opening and ending songs of .hack//SIGN and .hack//Liminality, as well as for the vocals on several background themes for the .hack//SIGN anime.