Uta means "to sing a song" in Japanese.
A manga adaptation of the film by Erubo Hijihara debuted in Shonen Jump+ on April 22, 2022.
Due to the WarnerMedia-Discovery merge following Discovery's acquisition of WarnerMedia from AT&T, becoming known as Warner Bros. Discovery, Bubble marks the final Warner Bros. film to feature the WarnerMedia byline.
The romance between Hibiki and Uta is based on The Little Mermaid fairy tale by Hans Christian Andersen.