The single was released in two versions; an "F" Edition (『F』盤) and a "Z" Edition (『Z』盤). The "F" Edition contains two tracks and their instrumental versions, a Blu-ray Disc of the title track's music video and has cover art depicting the group's members dressed as Dragon Ball character Freeza, while the back cover has a similar image as it would be seen through one of the series' "Scouter" devices. The "Z" Edition includes a cover of Dragon Ball Z's original opening theme song, "Cha-La Head-Cha-La" by Hironobu Kageyama, and an instrumental version in addition to the previous four tracks, with front and back cover art illustrations depicting the members in a Dragon Ball-style drawn by Toei Animation.[3][4]
A shortened movie version of the song is included on the Dragon Ball Z: Resurrection 'F' original soundtrack released on May 8, 2015.[5] An English-language version of the song titled "Pledge of "Z"" was recorded for use in international versions of the film.[6]Kanako Momota admitted that the English lyrics had to be transliterated into katakana so that the members could sing them.[7]
Momoiro Clover Z included a new version of "Z no Chikai", subtitled the "-ZZ Ver.-" and arranged by Tomoki Hasegawa, on the limited edition B version of their 2019 self-titled album.[8]
Music video
The music video for "Z no Chikai" was directed by Masatsugu Nagasoe and takes its theme from the Dragon Ball universe with the members of Momoiro Clover Z dressed as its characters. Kanako Momota is dressed as Son Goku, Shiori Tamai as Vegeta, Ayaka Sasaki as a mix of Bulma and Trunks, Momoka Ariyasu as Chaozu, and Reni Takagi as Piccolo.[9] All of them also dress as the villain Freeza towards the end of the video.
A short version of the video was released online on April 22, 2015,[9] while the full version was uploaded on May 1. The single's "F" Edition includes the music video on a Blu-ray Disc.