Naoki Urasawa
is a Japanese manga series written and illustrated by Naoki Urasawa. It was serialized in Shogakukan's "Big Comic Original" magazine from 2003 to 2009, with the chapters collected into eight "tankōbon" volumes. The series is based on Osamu Tezuka's "Astro Boy", specifically story arc, and named after the arc's chief villain. Urasawa reinterprets the story as a suspenseful murder mystery starring Gesicht, a Europol robot detective trying to solve the case of a string of robot and human deaths. Takashi Nagasaki is credited as the series' co-author. Macoto Tezka, Osamu Tezuka's son, supervised the series, and Tezuka Productions is listed as having given cooperation.