Black Jack's real name is Hazama Kuroo . Black Jack is the main character in the manga and anime. Even though he is an unlicensed surgeon, he is called to be a master surgeon. Many surgeons all over the world have asked him to perform surgeries. He askes for extremely high fees, and if the client is unable to pay, he won't do it. It was said that he uses the money to buy islands to keep the environment safe.
Instead of fighting with guns and bombs, he is skilled with fighting with fists. Since he was good at darts when he was young, he uses scapels instead of darts.
21 years ago, Black Jack was on the beach with his mother. Suddenly a bomb exploded and left him in pieces. Luckily a master surgeon Honma Jotaro operated on him, due that there was no more fresh skin left, they had to use his friend Takashi's skin, that is why his face has two sets of different colour skin. Due to stress, his right side of his hair is white. Unluckily, his mother was not saved. His father remarried and went overseas to Macau. By having a path lead by Dr. Honma Jotaro, he became a genius surgeon himself. When he was working in a hospital, there was a patient dying, but the head surgeon said it was useless performing a surgery. Black Jack did a surgery himself secretly, even though it was a success, the head surgeon took away his license. Black Jack explains the meaning behind both of his names: "Kuro" is written with the Japanese characters for "black" and "man;" as "Jack" is a common name for a man, he translates his name as "Black Jack."