This soundtrack marks the third collaboration between acclaimed film director Makoto Shinkai and Radwimps, following Your Name. and Weathering With You. Kazuma Jinnouchi, whose previous credits as a composer include Detective Pikachu and Star Wars: Visions, joined with Radwimps on the soundtrack, providing additional experience from Hollywood and anime alike.
TikTok star Toaka provides vocals for one of the theme songs “Suzume feat. Toaka”. Notably, several of the recordings for the soundtrack were held at Abbey Road Studios in London, with both Kazuma and Yojiro Noda of Radwimps conducting the orchestra at the famous site.