[2] Hikaru Utada released their first original single since their eighth Japanese-language studio album Bad Mode, titled "Gold (Mata au Hi Made)", on July 28, 2023.

[3] On December 9, Utada announced Science Fiction, their first greatest hits album, to commemorate their 25th anniversary since their debut in 1998 with "Automatic" / "Time Will Tell".

[5] Following the album announcement, the single "Naniiro de mo Nai Hana" was released on February 12, 2024, used as theme for the drama Kimi ga Kokoro o Kureta kara [ja].

[7] To promote Science Fiction, Utada's music videos produced between 1998 and 2012 were remastered in 4K resolution by artificial intelligence and premiered from March 14 for "Wait & See (Risk)" to April 8 for "First Love".

[10] Two songs from the album featured on the television advertisements starring by the singer—"Electricity" for general trading company Itochu,[11] and the re-recorded version of "Traveling" for iced green tea brand Ayataka.