Taiyou / Koe

 (太陽 / 声 Sun / Voice) is the fourth single of Moriyama Naotaro, featured as the theme song for the movie Half a Confession. It and ranked fifth on the Oricon.

Tracklist

 * 1) Taiyou (太陽 Sun)
 * 2) Koe (声 Voice)
 * 3) Taiyou [instrumental]
 * 4) Theme of "Radio Charity Musicthon"