The Anthem of the Heart , abbreviated as Kokosake (ここさけ) and subtitled Beautiful Word Beautiful World, is a 2015 Japanese animated youth drama film produced by A-1 Pictures and released in 2015. The film was directed by Tatsuyuki Nagai and written by Mari Okada. Masayoshi Tanaka served as the chief animation director and designed the characters. The trio, under the creative team name of Super Peace Busters, had previously worked on Toradora! and Anohana: The Flower We Saw That Day. The film was released in theaters in Japan on September 19, 2015.

A-1 Pictures, Inc. is a Japanese animation studio founded by ex-Sunrise producer Mikihiro Iwata. It is a subsidiary of Sony Music Entertainment Japan's anime production firm Aniplex.