Keiko Kubota

Keiko began singing, along with many other familiar names (Wakana, Kaori, Yoshida Yuuki, Ito Ayaka), when she became sponsored by Spacecraft (a talent agency in Japan). She performed alongside these other girls in many types of small concerts.

Her recording career began when she first worked with the already famous composer, Yuki Kajiura, on an insert song for the Tsubasa CHRoNiCLE anime. The song, "Kaze no Machi he," (風の街へ) featured a vocal style Yuki Kajiura had not focused much on in the past, an alto range. This made Keiko very unique in comparison to the other few dozen vocalists that were credited alongside Yuki Kajiura, and earned the name FictionJunction KEIKO, an honor only a handful of the collaborations can boast about.

After recording and releasing this song, Keiko teamed up with a friend named Ito Ayaka to form the duo "Itokubo". They recorded a song for a Japanese video game together ("Beautiful Katamari") and did a number of shows for about two years, before they quit in January of 2007.

Sometime in mid-2007, Yuki Kajiura was asked to do the soundtrack for the Kara no Kyoukai series of movies, where she held auditions for a group she named "Kalafina," who would do the ending themes to each movie. Keiko auditioned and was one of two vocalists to become a part of Kalafina, the other being another FictionJunction vocalist, Wakana.

Keiko has left Kalafina as of April 1, 2018. She's still in FictionJunction.

Keiko announced her solo debut via Avex on April 16, 2020.