Saishuu.com: Golgo 13 ゴルゴ13

Also known as Duke Togo, Golgo 13 has been called a Japanese counterpart to James Bond, except with a darker character, a much more hardcore attitude towards sex, and a complete lack of morality. Golgo 13 is described as a mystery man of undetermined origin, possibility being at least part Japanese, who takes any assignment for any employer (it has been said he has worked for the CIA and the KGB) as long as the right price is given (usually around $1 million for a hit) and will always fulfill his contracts, even if he has two or more opposing contracts at the same time.

He is an uncanny sharpshooter, with only one missed shot and capable of lethal trick shooting. He regularly uses a customized, scoped M-16 rifle in his assassinations. He also is a heavy cigar smoker. Despite Golgo's "amoral" status, he seems to take assignments that work with his own ethical logic as the stories are always set up so that Golgo is at least nominally a "good guy" -- his targets are typically criminals or people who otherwise at least partially "deserve" what they get.