[3] The series was adapted into a 2007 Japanese animated feature film by director Masayuki Kojima and production company Madhouse.

Kai's ability earns him the respect of Shuhei and his music teacher, former master pianist Sosuke Ajino.

[10] Kodansha Comics acquired the series for publication in English, and are releasing the volumes digitally.

[11] A spin-off manga titled Totonō Oto: Mō Hitotsu no Piano no Mori began serialization in Weekly Morning on December 26, 2024.

[45] Forest of Piano received the Grand Prize for best manga at the 12th Japan Media Arts Festival in 2008.

[46] The movie adaptation debuted in 9th place at the Japanese box office the week it came out, unusually high for a non-franchise animated film.