The release of this album marked the 10th anniversary of Kay's career in the music industry on the label Sony Music Entertainment Japan.

This compilation consists of Kay's hit songs and more, as well as a third disc with new tracks.

The album was certified Gold for shipment of 100,000 copies.

"Best of Crystal Kay" entered the Oricon Daily Chart at #2, and sold 26,929 units that day.

[1] This is Kay's best peak position on the Oricon Chart since All Yours in 2007, as well as her best first week sales since Call me Miss... in 2006.