The "City Hunter" comic was set in the late 1980s. The film moves the setting to current times.
The film is to be shot on the real-life streets of Tokyo's Shinjuku area, where the "City Hunter" saga is set.
In the "City Hunter" comic Ryo wears a Balmacaan coat, in the animes he wears a blue jacket, and in this film he wears a trenchcoat.