Monkey Punch
His younger brother, , worked as his assistant on "Lupin III". For years it was widely believed that the pen name Monkey Punch referred to the two brothers working together as a creative duo, but in a 2017 interview they clarified that this idea stemmed from a mistaken magazine article, and that the name Monkey Punch should be understood to refer exclusively to the older brother Kazuhiko, who did all of the main creative work concerning the characters, story, and the main drawings. The younger brother Teruhiko explained that he was exclusively doing assistant work.