Tetsujin 28 (2004)

The journey begins when Professor Kaneda creates the ultimate soldier robot, Tetsujin, as a substitute for his son, Shotaro, whom he mistakenly believed died in a bomb raid on Tokyo during World War II.

To prevent the army from using Tetsujin as a tool for destruction, the professor hides the robot on a remote island. Ten years after the war, Tetsujin is finally resurrected after 28 attempts...