"Winding Road" is a first collaboration single between Ayaka and duo Kobukuro.

This single was used in Japanese commercials to promote the Nissan Cube.

The commercial made its first television airing on March 1, 2007.

In its first week, the single placed 2nd on the Oricon weekly singles listing.

All tracks are written by Ayaka, Kentaro Kobuchi, and Shunsuke Kuroda