Kanon () is a Japanese adult visual novel developed by Key. It was released on 4 June 1999. It is playable on Windows PCs. Key later released versions of "Kanon" without the erotic content, and the game was ported to the Dreamcast, PlayStation 2 and PlayStation Portable. After the game's release, Kanon made several transitions into other media. Two Manga series were serialized in Dengeki Daioh and Dragon Age Pure. Comic anthologies, light novels and art books were also published, as were audio dramas and several music albums. Toei Animation produced a 13-episode anime television series in 2002 and an original video animation (OVA) episode in 2003. Kyoto Animation produced a 24-episode anime series in 2006.