Question: Which Japanese manga series written and illustrated by Naoki Urasawa, when turned into an anima, did Mami Koyama  have a voice acting part in?
Sentence (from "Monster (manga)"): It was published by Shogakukan in their "Big Comic Original" magazine between 1994 and 2001, with the chapters collected and reprinted into 18 "tankōbon" volumes.
Relevant evidence: No