Katsuo Fukuzawa

Tsukuda Kohei was once a researcher and engineer with the Aerospace and Science Exploration Agency and now runs Tsukuda Industries, a small factory which was left to him by his father. He accepted that the failure of a major launch was due to an inadequate item he produced and now struggles to design and supply a far better replacement. At the same time he also works on redesigning the engine and guidance systems of driverless tractors (imdb & me)

Michiko came to Tokyo to visit Hiromi, but is instead found murdered. The renter of Michiko's place is missing. The police is having a hard time finding clues and solving the case. There are not any clues and a connection between the dead and absent is not forthcoming. The only hint is an item found near the corpse, but it complicated the matters because it makes the file personal to one of the detectives assigned to the murder. (imdb)

One relatively peaceful post-war day in Japan, a barber and good family man, is unexpectedly arrested by the Prefectural Police, declared a suspected war criminal, and subsequently sued for murder by the American occupation forces.