Casshan

Casshan (1973) is a animation, sci-fi & fantasy, action & adventure with 1 season, rated 6.6/10.

Dr. Azuma creates robots to benefit mankind, but they unexpectedly rebel and begin to destroy everything in their paths. To deal with the catastrophe, Dr. Azuma's son volunteers to become a human robot, even though he knows he will never be able to return to human form again. He confronts this grave situation to ensure a bright future for all humans.