Junji Ito's Cat Diary: Yon & MuJunji Ito's Cat Diary: Yon & Mu.

Junji Ito's Cat Diary: Yon & Mu (Japanese: 伊藤潤二の猫日記 よん&むー, Hepburn: Itō Junji no Neko Nikki: Yon & Mū) is an autobiographical manga written and illustrated by Junji Ito. Appearing as a serial in Kodansha's seinen manga magazine Monthly Magazine Z from November 2007 to December 2008, it follows the adventures of J-kun, a horror manga artist as he adjusts to life with cats: Yon, whom his fiancėe brings along to their new house, and Mu, a Norwegian Forest cat whom the couple adopts as a kitten. Junji Ito's Cat Diary draws on autobiographical elements of Ito's personal experience with cats.