RahXephon (Japanese: ラーゼフォン, Hepburn: Rāzefon) is a Japanese anime television series created and directed by Yutaka Izubuchi. The series follows 17-year-old Ayato Kamina, his ability to control a mecha known as the RahXephon, and his inner journey to find a place in the world. His life as a student and artist in Tokyo is suddenly interrupted by a mysterious stalker, strange planes invading the city and strange machines fighting back.

The series was animated by Bones and it aired on Fuji TV for twenty-six episodes from January to September 2002. It was produced by Fuji TV, Bones, Media Factory and Victor Entertainment. The series received critical acclaim and was subsequently translated, released on the DVD and aired in several other countries, including the United States. A 2003 movie adaptation RahXephon: Pluralitas Concentio was directed by Tomoki Kyoda, with plot changes and new scenes. The series was also spun into novels, an extra OVA episode, an audio drama, a video game, illustration books and an altered manga adaptation by Takeaki Momose.

Director Izubuchi said RahXephon was his attempt to set a new standard for mecha anime, as well as to bring back aspects of 1970s mecha shows like Reideen The Brave.