The Case Closed anime, known as Meitantei Conan (名探偵コナン, lit. Great Detective Conan, officially translated as Detective Conan) in Japan, had spun off two original video animation series and two television special since its debut on January 8, 1996 on Nippon Television Network System (NNS) in Japan. The anime special features its own original plot with the general theme focused on Shinichi Kudo who was turned into a child by a poison called APTX 4869, but continues working as a detective under the alias Conan Edogawa. The Shōnen Sunday is a Case Closed original video animation series which is released directly to VHS and DVD. The OVA was available to order for those who were subscribed to Weekly Shōnen Sunday. Shōnen Sunday has released a new OVA yearly since 2000 with nine animations released as of March 2010. Shogakukan later collected the nine animations and released them into four DVD compilations with the title Secret Files.