MojackoMojacko.

Mojacko (モジャ公, Moja-kō; "Duke Moja") is a shōnen manga series written and illustrated by Fujiko F. Fujio. It was first serialized in Kodansha's Weekly Bokura Magazine in 1969 to 1970, for 35 chapters, eventually compiled into 2 tankōbon volumes. It was then revived twice by Masahito and published in Shogakukan's CoroCoro Comic from September 1995 to April 1996, with a total of 1 volume.