- Genres Action, Adventure, Animation, Fantasy, Science-Fiction
- Runtime 25 minutes
- Total runtime 5 hours
- Status Ended
- Network Animax
The X-Men are reunited following the death of a teammate, and are summoned by Charles Xavier to Japan following the abduction of Hisako Ichiki (Armor). There, they confront the U-Men, a lunatic cult that steals and transplants mutant organs to further strengthen their own army, and the battle for justice is on.