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Forest of Piano, known in Japan as Piano no Mori: The Perfect World of Kai , is a Japanese manga series written and illustrated by Makoto Isshiki. It was serialized by Kodansha from 1998 to 2015, initially in Young Magazine Uppers before transferring to Weekly Morning. Serialization is irregular, and went on hiatus in 2002 before resuming in 2006. The series ended after 26 bound volumes. The series was adapted into a 2007 Japanese animated feature film by director Masayuki Kojima and production company Madhouse. The film featured performances by the renowned pianist Vladimir Ashkenazy. An anime television series adaptation produced by Gaina premiered from April 8, 2018 to April 14, 2019 on NHK.