Duo formed by Yuki Kajiura and Keiko Kubota. Two songs have been released so far. The first, called (Kaze no Machi e), was included in the Tsubasa Chronicle Original Soundtrack Future Soundscape II, and later was re-released in the FictionJunction album Everlasting Songs.
In January 27, 2010, FictionJunction released their 2nd single, called 時の向こう 幻の空 (Toki no Mukou Maboroshi no Sora). The c/w song, 野原 (Nohara) is sung by FictionJunction KEIKO, with WAKANA, KAORI and Yuriko Kaida doing the chorus.
In other appearances, Keiko sang along with Yuriko Kaida and Wakana Ootaki the songs epithalamion and Hanamori no Oka in the Kenshiro and Yuria After Soul Wedding event.
Keiko is also a member of Kalafina, along with Wakana Ootaki, Hikaru and Maya.
Kaze no Machi e – Insert Theme song of Tsubasa Chronicle