Hyakuju-sentai Gaoranger' happens to be the 25th live action "Sentai" series since "Goranger". Many events celebrating the show are happening, and this CD is a part of that celebration. It includes the TV-size versions of the opening and closing theme songs of all the shows, including Goranger, Jacker Dengekitai, Denjiman, Sun Vulcan, Time Rangers, and Gaoranger.