A spin-off manga series, titled Handa-kun, was serialized in Monthly Shōnen Gangan from October 2013 to September 2016.

The prequel spin-off Handa-kun is about Seishu Handa's high school days, six years prior to the events of Barakamon.

Written and illustrated by Satsuki Yoshino [ja], Barakamon started as a one-shot in Square Enix's Gangan Powered on February 22, 2008.

[a] Two other chapters appeared in the magazine, with the third one released on February 21, 2009;[14][15] the manga continued as a serial on the Gangan Online website from the same day.

[27][28] A spin-off/prequel manga, titled Handa-kun (はんだくん), also written and illustrated by Yoshino, was serialized in Monthly Shōnen Gangan from October 12, 2013,[29] to September 12, 2016.

An anime television adaptation of the Handa-kun spin-off manga was announced on Square Enix's Gangan Online website on February 1, 2016.

[40] Michiko Yokote, Mariko Kunisawa, and Miharu Hirami wrote the series' scripts, while Mayuko Matsumoto designed the characters and Kenji Kawai composed the music.

[44] The series is directed by Keita Kono, with Masataka Takamaru serving as producer, Kumiko Asō handling the screenplay and Juichi Uehara in charge of planning.