Best Investigation movies of 1964

Actors : Rodolfo Landa, Gina Romand, Chucho Salinas, Wolf Ruvinskis,
Directors : Alfredo B. Crevenna,

Neutron, a wrestler/superhero, investigates a series of murders at a sanitarium.

Actors : Hideaki Nitani, Yûjirô Ishihara, Nobuo Kaneko, Ruriko Asaoka,
Directors : Toshio Masuda,

A hot-shot detective in Yokohama kills a witness during a drug investigation. He flees to the countryside and evades his past for several years, only to return to find the woman he loved ...

Actors : Elizabeth Shepherd, Alexander Davion, Barbara Shelley, William Sylvester,
Directors : Lance Comfort,

When the wife of a blind composer discovers that her husband will cut her out of his estate, if he discovers that she is having an affair with a young artist, she and her lover plan to commit the perfect murder.

Actors : M.G. Ramachandran, Saroja Devi B., Sennalkudi Lakshmi, Ashokan,
Directors : P. Madhavan,

Maran, a police officer, grows up with the belief that his father was killed in a tragic accident. However, when he sets out to investigate a case, he learns that his father leads a terrorist group.

Actors : Keiji Sada, Michiyo Aratama, Kyôko Kishida, Tsutomu Yamazaki,
Directors : Hiromichi Horikawa,

A Japanese detective, Kikuchi, is framed for a murder and sent to prison. When he is paroled, he joins a private detective agency to investigate his case and investigates Mitsue Takazawa, ...