Japanese director Kei Ishikawa's first feature film, "Gukoroku," premiered at the Venice film festival on Tuesday, exploring the dynamics of social cliques through a crime mystery story.

The movie, titled "Traces of Sin" in English, tells the story of an investigative reporter named Tanaka (Satoshi Tsumabuki) who looks into an unresolved case of the brutal murder of a successful businessman and his family and discovers that the diseased and their world were not as ideal as believed.

The movie, whose director of photography was Poland's Piotr Niemyjski, was shown as part of the film festival's Orizzonti section.

"I am just looking forward to how the audience will respond to a film that's depicting Japan but also being shot by a Polish director of photography," actress Hikari Mitsushima, who portrays Tanaka's sister Mitsuko, told a press conference ahead of the movie's official premiere.

The Venice film festival runs until Sept. 10.