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 first chapter appeared in the May 1994 issue and the series is currently ongoing, with 734 chapters published as of May 18, 2010. In North America, Case Closed is licensed by Viz Media. Thirty-four volumes were released between September 7, 2004 and released on April 13, 2010. Viz continued to release the series bimonthly until January 2010, after which, it has switched to quarterly.