A Song to the Sun is a 2006 Japanese film directed by Norihiro Koizumi starring Yui.

Yui, stylized as YUI or yui, is a Japanese singer-songwriter and multi-instrumentalist. In her solo career, she sold more than 5 million physical copies in Japan. She is popular in Japan and in surrounding countries, ranking number one in 2011 Count Down TV "Dearest Female Artist" and Music Station "Artist You Most Want to Marry" polls, as well as Radio Television Hong Kong's "Most Popular Japanese Artist".