The World of Kanako (2014)

There is murder, investigations, the whole disturbing feeling, but meanwhile Kanako bets in a more physical form of violence, Traces of a Sin is something more psychological, there are some other similarities as well.

Both films are, in their own ways, about one person trying to learn about the life of another person, who they previously did not know everything about. Both films handle this by showing us our main guy, in present day, meeting people and learning about the person through stories, and then, we, the audience, are shown flashbacks where we too learn about the life of the person.
Memories of Matsuko is about a young man piecing together the life of his now deceased aunt, who he didn't even know about beforehand, while The World of Kanako is about a father whose daughter goes missing, and as he doesn't have a close relationship with her, he learns about her from others and has to piece together her life in order to track where she's gone.

Both films are quite dark (World of Kanako is more unsettling and graphic while Memories of Matsuko is more tragic and depressing). If you've seen The World of Kanako, you can handle Memories of Matsuko, but if you're coming from Memories of Matsuko, please be aware that The World of Kanako is a lot more graphic.

The story is not that similar. But both show a famale character in high school, that is envied by her classmates because of her pretty face. They seem innocent, but as the story develops the darker side of both are shown.

in both a girl goes missing and one parent tries to find her. While theyre looking for her they discover things about the girl that they didnt know before and realize that shes not who they thought she was.

The plots are very similar: a good girl disappears and the investigation reveals many secrets.

Genres: Thriller, Mystery, Crime, Drama
Tags: Murder, Domestic Abuse, School Bullying, Rape, Drug Addiction, Sexual Assault, Sexual Content, Death, Adapted From A Novel, Nudity

Both are about a detective and his only daughter, who's in high school and has some sort of secret life her dad was unaware of.

Genres: Action, Thriller, Mystery, Psychological
Tags: Revenge, Kidnapping, Captivity, Sexual Content, Nudity, Noir, Suspense, Prolonged Nudity, Age Gap [Drama Life], Age Gap [Real Life]

Genres: Mystery, Psychological, Life, Drama
Tags: School Bullying, Dysfunctional Family, Hidden Identity, Adapted From A Novel, High School, Eccentric Male Lead, Student-Teacher Relationship, Tragic Past, Student Male Lead, Tutor Male Lead

Highschool students, bullying, disturbed female, & same kinda vibe.............................................................

Genres: Psychological, Life, Drama, Melodrama
Tags: Plastic Surgery, Drug Usage, Bisexual Female Lead, LGBTQ+, Adapted From A Manga, Nudity, Antihero Male Lead, Model Female Lead, Illegal Business, Famous Female Lead

A manipulative FL with destructive goals in mind for her victims..............................................................

Genres: Drama, Family
Tags: Money-Hungry Male Lead, Death, Money-Obsession, Rags To Riches, Poor Male Lead, Tragic Past, Murder, Adapted From A Manga, Revenge, Father-Son Relationship

Genres: Thriller, Horror, Psychological, Youth
Tags: Slasher Film, Massacre, Death, High School, Student-Teacher Relationship, Murder, Adapted From A Novel, Suspense, LGBTQ+, Dark Fiction

Both talk about adolescence problems, in a violent and gore style. The World of Kanako will be a little more hard to watch, in my opinion, since they show more details, but overall they are both great movies.