IGPX: Immortal Grand Prix (IGPX インモータル・グランプリ) refers to two anime series co-produced simultaneously by Cartoon Network and Production I.G. The first is a "microseries" consisting of five 5-minute episodes, and the second is a 26-episode animated series loosely related to the first. Koichi Mashimo co-wrote and directed the microseries, while Bee Train Animation and Production I.G animated it, and Bandai Entertainment acted as the North American distributor.