Kokoro has been adapted into at least two films. The first was released in 1955 and directed by celebrated filmmaker Kon Ichikawa. This film was released by the Masters of Cinema organization and is available on Region-2 DVD.
The novel was also adapted into film in 1973, by director Kaneto Shindo.
In addition, the novel was also adapted into a two-episode part of the Aoi Bungaku anime series, directed by Shigeyuki Miya.
The novel was also made into a two-hour special television presentation for Television Tokyo's 30th anniversary, which aired in Japan in 1995.
The novel has been adapted to manga twice, first by Nariko Enomoto and second as part of the Manga de Dokuha series.