Our Little Sister Poster Directed by Hirokazu Koreeda Produced by Kaoru Matsuzaki Hijiri Taguchi Screenplay by Hirokazu Koreeda Based on Umimachi Diary by Akimi Yoshida Starring Haruka Ayase Masami Nagasawa Kaho Suzu Hirose Music by Yoko Kanno Cinematography Mikiya Takimoto Edited by Hirokazu Koreeda Production company Toho Gaga Fuji Television Network Shogakukan TV Man Union Distributed by Toho Gaga Release date 14 May 2015 (2015-05-14) (Cannes) 13 June 2015 (2015-06-13) (Japan) 8 July 2016 (2016-07-08) (United States) Running time 126 minutes Country Japan Language Japanese Box office ¥1.55 billion[1]