- Type: TV
- Studio: Production I.G
- Publish Date 2007-02-04
- Status: Completed
- Genre: Action Animation Sci-Fi
- Scores: 2.53 by 4,405 reviews
- Duration: 24 min
- Views: 380
Reideen
Saiga is an average high school student who has a talent for math. When his family learns that his Father, a well-known archeologist and researcher who had gone missing while studying a site many years earlier, has been found, his daily routine is upended. Near a famous triangle mountain in Japan known as "Japan's pyramid," a location where some believe was artificially created, were found among his remains letters and artifacts that required to be identified by the family. Saiga is in danger when a meteor carrying a strange robotic lifeform falls from the sky and starts towrd, which causes a mysterious bracelet from his father's research to activate and merge him with an ancient robot buried within the pyramid—a robot the runes refer to as Reideen—and put him in danger. Now it is up to Saiga and the guardian Reideen to defend themselves from this unknown aerial threat.