I Don't Know You (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

An emotional drama about teenage Asako and her relationship with Yuhei, a man who became a father figure to her for six months when she was five years old after he started dating her mother. Thirteen years later, she discovers he is serving…

I Don't Know You (2026) is presented here through its confirmed story and production details. An emotional drama about teenage Asako and her relationship with Yuhei, a man who became a father figure to her for six months when she was five years old after he started dating her mother. Thirteen years later, she discovers he is serving a prison sentence, having been convicted of her mother’s murder.

I Don't Know You movie details

Story without spoilers

An emotional drama about teenage Asako and her relationship with Yuhei, a man who became a father figure to her for six months when she was five years old after he started dating her mother. Thirteen years later, she discovers he is serving a prison sentence, having been convicted of her mother’s murder.

What to expect

The film is classified as Drama. That genre mix and the published premise are the clearest guide to what viewers can expect without moving beyond the confirmed information.

Cast and creative team

Directed by Ryota Nakano. Writing credits include Ryota Nakano. The listed cast includes Kentaro Sakaguchi, Hayase Ikoi, Mayu Hotta, Kenichi Takitoh, Mieko Harada.

• Kentaro Sakaguchi as Yuhei
• Hayase Ikoi
• Mayu Hotta
• Kenichi Takitoh
• Mieko Harada

Release and production context

The listed release date is 2026-08-28. Production countries: Japan, France. Spoken languages: Japanese.

Production companies: Pipeline, THE KLOCKWORX

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This guide keeps the focus on confirmed information about I Don't Know You, without adding unverified plot or viewing claims.

Film data:
TMDB