A Colt Is My Passport (1967)

The melancholy, homely Kamimura is a hit man who takes a job to kill a mob boss who's gotten greedy. The rival gang lord who hires Kamimura and his driver Shun pays them and sets them up in a hotel for a night while arranging safe passage on a ship. The son of the dead man comes to his rival and offers a partnership and cash in exchange for Kamimura's death. The boss considers his choice: morals or money? A maid at the hotel tries to aid the escape of Kamimura and Shun. As the two gangs close in, Kamimura chooses honor. Will his stoicism be his shroud?