Gambling Emperor Legend Zero (Japanese: 賭博覇王伝 零, Hepburn: Tobaku Haōden Zero) is a Japanese manga series written and illustrated by Nobuyuki Fukumoto, who is renowned for his works Kaiji and Akagi. Similar to Fukumoto's other works, the story revolves around gambling with high stakes, this time with a greater focus on competition and rivalry. The first part was serialized in Kodansha's Weekly Shōnen Magazine from September 2007 to March 2009. The second part was serialized from July 2011 to May 2013.