"Where Our Blue Is" (青のすみか, Ao no Sumika) is the third EP by Japanese singer- songwriter Tatsuya Kitani, released on July 19, 2023, by Mastersix Foundation

. The title track "Where Our Blue Is" serves as the third opening theme song for the anime series Jujutsu Kaisen season 2

. The song's concept centers on "farewell peculiar to youth," with a refreshing impression reflecting youthfulness, as requested by the anime production team

. The music video was filmed in the desert of Dubai and released on YouTube on July 13, 2023

. The song reached number two on several Billboard Japan charts, including the Hot 100, Download Songs, and Streaming Songs charts

. The EP was released in two editions: a standard edition featuring the title track, a self-cover of "Love Song" (featuring Eve), and two other tracks; and a first press limited edition including a DVD of a live performance from Kitani's one-man tour

. Kitani wrote, composed, and performed the tracks, with contributions from other musicians and engineers for drums, piano, and mixing

. The song "Where Our Blue Is" lyrically and visually emphasizes the blue theme associated with the youth of the characters Satoru Gojo and Suguru Geto from Jujutsu Kaisen , using blue backgrounds and motifs

. The song has received critical acclaim, winning Best Opening Sequence at the 2024 Crunchyroll Anime Awards and placing third for Best Theme Song at the Anime Grand Prix 2024

. In summary, "Where Our Blue Is" is a significant work by Tatsuya Kitani tied closely to Jujutsu Kaisen season 2, embodying themes of youth and farewell with a distinctive blue motif