Black Challenger

Two car manufacturers spy on each other to try to find out details and prices of a new sports car each is about to launch.

After a businessman is murdered, an investigation identifies a suspect who is then put on trial for that crime.

The case of the counterfeit bills that spread all over Japan.

A talent scout who had his eyes set on a star left-handed pitcher in the high school baseball world falls to his death at his hotel. Was it a homicide or suicide? His junior colleague pursues the mystery of his death.

Ide of the Kokusai Rayon Company visits a supermarket and finds cheap shirts being passed off as his company's products. But a closer look reveals that the last letter of "Kokusai" has been changed to "n" and reads "Kokusan." The buyers, however, are all under the impression that they are buying Kokusai shirts. Ide begins an investigation to find out where the shirts are being made, but before he is able to uncover anything, he is killed on a train and his little black book, filled with secret data, is stolen. Sugino then starts a one-man search for both the killer and the factory turning out the cheap shirts.

Industrial espionage in the pharmaceutical industry. Also known in English as “Black Parking Lot”.

Takuya Tsuda is a cop who loves motorcycles. One day a speeding motorcycle seriously injures a child and his investigations lead Takuya to Akio Yazawa, the boss of the Sakamoto Motorcycle Club.

Industrial espionage gets in the way of love and marriage for factory worker Katayanagi.

Chairman of the Shin Nihon Kaihatsu company Fukazawa, using clever ways to circumvent the law, rose to the top of the economic backstage. Three people are sacrificed to his greed. The president of a small company who committed suicide, a Yakuza who died during the destruction of his territory, and a former viscount whose wife and property were stolen by Fukazawa. Their sons vowed to hunt down Fukazawa and take revenge.

A man operates a small real estate business near Osaka. A man from Tokyo asks for help in buying a large tract of land in order, he says, to build an automobile factory. But by accident the realtor learns that the Tokaido Railway Line is going to be built directly across the land just acquired. Also known as Black Super Express