Golgo 13: The Professional

Professional contract killer Duke Togo—codenamed "Golgo 13"—is hired to assassinate Robert Dawson, the son of oil baron Leonard Dawson and the heir of Dawson Enterprises, and succeeds. Later, after accomplishing a hit on a powerful crime boss in Sicily, Golgo is suddenly attacked by the U.S. military and discovers that his informant, the clockmaker, has been killed by Snake, a genetically altered assassin. Aided by The Pentagon, the Federal Bureau of Investigation, and the Central Intelligence Agency, Dawson has become determined to kill Golgo and avenge his son's death.