Isao Sasaki & Mitsuko Horie have been the first Super Sentai → Gorenger's Theme Song Singers. As a homage to them, Kaito's (Zenkaiser) parents name were taken from them. Columbia had recently revealed the tracklist of Opening Song Single & this single included the title of the first Insert Theme Song.
The title is "Zenkai Gattai! JuraGaon" & it is sung by Isao Sasaki & Mitsuko Horie. This will be the Theme Song of Zenkai-Oh JuraGaon.
When it comes to the Single, it will be released in two editions. One if normal edition which will contain the Opening Song "Zenryoku Zenkai! Zenkaiger" & Insert Theme "Zenkai Gattai! JuraGaon" along with their instrumental.
Another edition - "Zenryoku Zenkai Edition" will contain TV Size Opening Themes of all 45 Super Sentai Series along with contents from Normal Edition.
The single will be released on April 7th.