AllMovie

Secret Agent of Japan sometimes looks like a B-grade "answer" to Warner Bros.' Casablanca, except that the answer was released several months before the question. The principal character is Roy Bonnell (Preston Foster), the cynical American owner of Shanghai nightclub. On the lam from a criminal charge in the US, Bonnell prefers to keep a low profile, especially in political matters. His long-dormant patriotism is revived when he finds out that Japanese spies are buying up property in Shanghai and are mistreating the local citizens. Teaming up with glamorous British secret agent Kay Murdock (Lynn Bari), Bonnell turns spy himself, secretly reporting Axis activities to the British government-even though he's putting his own life on the line by doing so.