March 27th, 2008
As mentioned earlier this month, Yuki Kajiura will be composing the ending theme for the anime Amatsuki, with Kaori Hikita as the vocalist, titled Namae no Nai Michi. Today, the Amatsuki website posted a 1.5 minute preview video of the anime, with a song whose vocalist that sounds a lot like Kaori Hikita.
The single is set for release on June 18, 2008.
[EDIT] This page confirms that the song in the preview is indeed Namae no Nai Michi, by Yuki Kajiura and Kaori Hikita!