Golgo 13 (ゴルゴ13, Gorugo Sātīn?) is a manga series written and illustrated by Takao Saito, published in Shogakukan's Big Comic magazine since 1969. The series follows Duke Togo, a professional assassin for hire.

The manga is one of the longest running adult manga in Japan and has sold over 200 million copies in various formats, including compilation books. It has been adapted into two live-action feature films, two animated films, a television series and three video games.

Source: Wikipedia