When an American is murdered in a Japanese inn, Tokyo police detective Munesue follows the trail of the killer to New York. There he is joined by a New York City detective named Shuftan and together they sort out the crime.
Proof of the Man is a Japanese film from 1977 directed by Junya Satō, starring George Kennedy and Yūsaku Matsuda. It is an adaptation of the bestselling novel of the same name by Seiichi Morimura. It was produced by Haruki Kadokawa.