Kofuku (1981)

Kofuku, also known as "Lonely Heart" is a 1981 mystery film directed by Kon Ichikawa, based upon the 87th Precinct series' novel, Lady, Lady I Did It (1961) by Ed McBain. The film stars Yutaka Mizutani, Toshiyuki Nagashima and Rie Nakahara in a police procedural surrounding murder at a bookstore and the private lives of the cops trying to solve the case.

More at Wikipedia.