Ashita no Prism

 is the third single by Hirano Aya. It was released on September 6, 2006, and peaked at #13 on the Oricon singles chart.

Tracklist

 * 1) Ashita no Prism (明日のプリズム)
 * 2) Yorokobi no Uta (ヨロコビの歌)
 * 3) Ashita no Prism (明日のプリズム) (off vocal)
 * 4) Yorokobi no Uta (ヨロコビの歌) (off vocal)