Makoto Shinkai directed and wrote the script for "Dareka no Manazashi". The producers were CoMix Wave Films, NEST, TYO M1, and The Answer Studio Co., Ltd. The music in the movie was directed by Akihisa Matsuura. The theme song of the movie was performed by Kazusa. Shinkai said he chose Kazusa to sing the music because he thought that her music would be liked by younger people.