Case Closed, known as Meitantei Conan (名探偵 コナン, Detective Conan) in Japan, is written by Gosho Aoyama and serialized in Weekly Shōnen Sunday. The series began its serialization in 1994. Shogakukan later collects these chapters in tankōbon bound volumes. Viz Media licenses the Case Closed manga for an English adaptation in North America. Several adaptations based on Case Closed have been made including the anime series and thirteen featured films, with the fourteenth slated for release during the spring of 2010. Shogakukan has collected 707 chapters into 67 tankōbon in Japan. The first volume was released on June 18, 1994, and volume 67 was released on February 18, 2010. In addition, ani-manga tankōbon based on the Case Closed films have been released by Shogakukan, each movie cut into two parts. Viz Media released 33 volumes of the English adaptation of the manga, with volume 1 released on September 7, 2004, and volume 33 released on January 19, 2010. Viz continued to release the series bimonthly until January 2010, after which, it has switched to trimonthly.