Motohiro Katou (Japanese: , Hepburn: Kat? Motohiro) is a Japanese manga artist, best known for creating the Q.E.D. series.
He made his debut on game-related works for Enix. Presently he publishes his detective manga works on Kodansha.
In 2009, he received the Kodansha Manga Award for his work on Q.E.D..