Procurer of Hell (1961)

Tobe is a small-time crook who runs a prostitution business of blonde girls, as well as sells pornographic pictures. He frequents a cafe run by two women, one of them a young widow with a son. They like him and think that he is an ordinary office worker. One day, Tobe accidentally discovers pictures of an acquaintance, Kanzaburo, with a woman and sets out to blackmail him. He soon finds out that Kanzaburo died in a train accident but things may not be what they seem

Unfortunately the movie Procurer of Hell is not yet available on HBO Max.