How to Generate a Perfect Crime (2026): Cast, Story and Release

Prepared by Movies Dock Editorial

How to Generate a Perfect Crime follows Wataru after his sister kills a threatening teacher in self-defense. Turning to an AI chatbot, he attempts to disguise the death as a random homicide while following a generated plan for an apparently perfect crime.

How to Generate a Perfect Crime is a 2026 Japanese crime thriller about desperation, concealment and the dangerous use of artificial intelligence. The story centers on Wataru, who takes drastic steps after his sister, Sara, is involved in a teacher’s death.

Rather than reporting what happened, Wataru asks an AI chatbot for help. Its instructions lead him toward staging the crime scene and hiding evidence, setting up a tense conflict between an improvised cover-up and the consequences it may create.

How to Generate a Perfect Crime movie details

Story without spoilers

Sara accidentally kills her threatening teacher while defending herself. Faced with the possibility that his sister could be exposed, Wataru decides to protect her instead of leaving the death to be investigated as it happened.

He uses an AI chatbot to create a plan for a “perfect crime,” then follows its guidance to alter the scene and conceal evidence. His aim is to make the killing appear to be a random homicide, placing the film’s central tension on whether a generated plan can truly control the outcome of a real crime.

What to expect

The film combines crime-thriller suspense with a contemporary premise involving AI-generated instructions. Its 1-hour, 47-minute runtime leaves room for the story to focus on Wataru’s decision, the construction of the cover-up and the pressure surrounding the attempt to disguise the death.

The premise points to a story about calculated deception and escalating risk, while the self-defense circumstances add a difficult moral situation at its center. The details supplied do not indicate how the investigation unfolds or how the story ends, so those elements are best left unspoiled.

Cast and creative team

Daiki Shigeoka plays Wataru, the character who turns to an AI chatbot after his sister’s involvement in the teacher’s death. Nanoka Hara, Minami Tanaka, Ayumi Ito, Daisuke Kuroda, Ryu Morioka, Kaibashira and Kanji Ishimaru also appear in the cast.

Ryota Kondo directs How to Generate a Perfect Crime, with a screenplay credited to Michitaka Okada.

• Daiki Shigeoka as Wataru
• Nanoka Hara
• Minami Tanaka
• Ayumi Ito
• Daisuke Kuroda
• Ryu Morioka
• Kaibashira
• Kanji Ishimaru

Release and production context

How to Generate a Perfect Crime is a Japanese production in the crime and thriller genres. It is listed with a release date of September 11, 2026, and a runtime of 1 hour and 47 minutes. The spoken language is Japanese, and the film’s original title is 5秒で完全犯罪を生成する方法.

Movies Dock view

With its AI-centered premise and focus on a desperate family decision, How to Generate a Perfect Crime frames a crime thriller around the attempt to make an unpredictable event look random. Viewers looking for a spoiler-free introduction can expect a story built around concealment, instructions and the risks of trying to engineer a perfect crime.

Film data:
TMDB · IMDb