The Hard 

M60-toting Kenji Hado, known as "the Hard", pays his divorce bills by working in the US as a bounty hunter. Masseria, a ruthless and ambitious mafia boss, targets his family - starting with the Hard's father-in-law, a Don in the NY mafia. Hard's aim, while poor when sober, becomes extremely accurate when drunk! The short story N.Y. Dust, in volume 12 of Riki-Oh, was the prototype for The Hard.