Heisei Tekkihei

At a small auto repair shop called Kadō Motors, Kadō is shot at from behind by four armed men while working on a car. However, using his tools, he easily fends off all four attackers. Then, a man appears and identifies himself as being from the Metropolitan Police Department, saying that he wanted to test Kadō's skills.

Kadō Tetsutarō is a skilled veteran who, during the Vietnam War, earned the nickname "Iron Demon Soldier" while serving in the Green Berets. Recognizing his abilities, the man requests Kadō to serve as a bodyguard for former Prime Minister Uematsu Iwao.

An action series featuring Kadō Tetsutarō, the Iron Demon Soldier, who uses his past experience to battle vicious criminals and assassins!!

Source: BookLive, translated