It is the 44th entry of Toei's long-running Super Sentai metaseries and the first series to air exclusively in the Reiwa era.

[4] After planet Crystaria is invaded, Princess Mabushina takes the Kiramai Stones and seeks refuge on Earth to find individuals with strong "shining spirits", or Kiramental, to become the Kiramagers and fight off the threat of Yodonheim, an imperial army of darkness that now plans to invade Earth.

[1][2][3][5] With help from Muryo Hakataminami, the founder of CARAT, a private organization created in preparation for Yodonheim's attack, Mabushina meets the passionate artist Juru Atsuta, the esports professional Tametomo Imizu, the prodigy athlete Sena Hayami, the famous actor Shiguru Oshikiri, and the talented surgeon Sayo Oharu, who accept the duty to protect Earth as the Kiramagers.

The team later gains a sixth member: the treasure hunter Takamichi Crystaria, Muryo's long-lost older brother who was adopted into Mabushina's family after he became a human/Crystarian hybrid.

Machine Sentai Kiramager was trademarked in September and officially announced on Christmas Day, 2019.

On March 31, 2020, a press conference held by TV Asahi revealed that Rio Komiya, the actor playing Juru Atsuta, had tested positive for COVID-19.

[11] On April 9, Komiya had announced via his Twitter that he was officially discharged from the hospital, however, he would still remain in self-quarantine at home for at least two weeks.

[20] The film also includes a cameo of PPAP (Pen-Pineapple-Apple-Pen) performed by Daimaou Kosaka, who is also Muryo Hakataminami's actor in the series.

[23][24] The V-Cinema commemorates the 10th anniversary of Kaizoku Sentai Gokaiger[23] and features an appearance by Kohei Shoji as Kiramager character Takamichi Crystaria.

Nashiko Momotsuki, Mizuki Saiba, Rio Komiya, and Rui Kihara return to perform their roles from the main series.