Based on the manga of the same name written by Arata Miyatsuki and illustrated by Shigure Kondo, the film stars Kanna Hashimoto and Yuta Koseki.

[1] Signal 100 premiered at the Sitges Film Festival in October 2019.

[2] It received a theatrical release in Japan on 24 January 2020.

[2] It was released in Japan across theatres nationwide on 24 January 2020.

[2][5] On 24 January 2023, the film was made available in the United States on the streaming service Screambox.