During World War II, Dr. Asagumo is summoned to Nazi Germany by Hitler himself to assist in developing a powerful new weapon called "Big X." Worried about the consequences if it’s completed, he secretly stalls the project with the help of his fellow researcher, the cunning Dr. Engel. Just before Germany’s defeat, Dr. Asagumo hides a card containing Big X’s secrets inside his son, Shigeru, before being executed by the German army. Two decades later, the card is found inside Shigeru, now living in Tokyo. Soon after, a group claiming ties to the Nazis steals the card and finishes the Big X project. Dr. Engel’s grandson has joined their ranks. Big X turns out to be a dangerous drug capable of making the human body grow indefinitely. To stop the Nazi Alliance and Hans Engel from using it to take over the world, Shigeru’s son Akira sets out to reclaim Big X and confront them.

Big X - S01
During World War II, Dr. Asagumo is summoned to Nazi Germany by Hitler himself to assist in developing a powerful new weapon called "Big X." Worried about the consequences if it’s completed, he secretly stalls the project with the help of his fellow researcher, the cunning Dr. Engel. Just before Germany’s defeat, Dr. Asagumo hides a card containing Big X’s secrets inside his son, Shigeru, before being executed by the German army. Two decades later, the card is found inside Shigeru, now living in Tokyo. Soon after, a group claiming ties to the Nazis steals the card and finishes the Big X project. Dr. Engel’s grandson has joined their ranks. Big X turns out to be a dangerous drug capable of making the human body grow indefinitely. To stop the Nazi Alliance and Hans Engel from using it to take over the world, Shigeru’s son Akira sets out to reclaim Big X and confront them.
Seasons (1)
Episodes (59)
Characters & Voice Actors



















