The original soundtrack for "Hana Rokusho ga Akeru Hi ni"-the directorial debut of celebrated painter and animator Yoshitoshi Shinomiya-is a masterful 15-track collection produced entirely by Shuta Hasunuma. Mirroring the film's painterly aesthetic, the album weaves together approachable piano melodies, elegant strings, and atmospheric synthesizers that resonate within minimalist sonic spaces to mirror the characters' delicate emotional shifts. Central to the project is the theme song "Aoba -Movie Ver.-," a collaborative masterpiece that reveals a new, nuanced side of singer-songwriter imase through Hasunuma's sophisticated arrangements. Featuring a seasoned ensemble including cellist Seigen Tokuzawa and guitarist Shuta Ishizuka, the soundtrack offers a vivid, color-rich listening experience that perfectly captures the film's visual beauty, all brought to life through Toshihiko Kasai's recording, Matt Colton's mixing, and Seri Tanaka's refined jacket design.