Children Untold (2026): Cast, Story and Release Details

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Children Untold is a 2026 Japanese drama about children facing the difficult realities of survival after war. Written and directed by Miwa Nishikawa, the film runs 150 minutes and features an ensemble cast led by Ami Koyae, Fumi Nikaido and Kaito Sakurai.

Children Untold is a Japanese drama set in the aftermath of war, when the formal fighting may have ended but vulnerable children are still struggling to survive. The film is written and directed by Miwa Nishikawa and adapted from her forthcoming novel.

With a 150-minute runtime and a cast that includes Ami Koyae, Fumi Nikaido, Kaito Sakurai and Koji Yakusho, the film places its focus on the lives of children and the adults around them. It is scheduled for release on October 16, 2026.

Children Untold movie details

Story without spoilers

The story begins after the war has ended, but it does not treat peace as the end of hardship. For the children at the center of Children Untold, survival remains an immediate and ongoing challenge.

The supplied synopsis keeps the plot deliberately broad, offering a postwar drama focused on young lives shaped by circumstances beyond their control. The cast list identifies characters connected to families, an orphanage, journalism and police work, suggesting a story that includes both children and the wider adult structures surrounding them without revealing how their paths unfold.

What to expect

Children Untold is positioned as a serious war drama rather than a depiction of combat itself. Its premise centers on the consequences of war after the fighting has stopped, with particular attention to children confronting the next stage of their lives.

The film’s 150-minute length indicates an expansive drama, while its Japanese, English and Korean dialogue points to a multilingual setting or cast. Beyond those details, the available information does not establish specific stylistic choices, story turns or the nature of the ending.

Cast and creative team

Miwa Nishikawa serves as both director and writer. The film is adapted from her forthcoming novel.

Ami Koyae plays Kotoko Kayano and Shigeo, while Fumi Nikaido appears as Fumiko Sone and Kaito Sakurai plays Ritsuro Kayano. Yutaka Takenouchi portrays Koichi Kayano. Koji Yakusho plays Jinbe Yamai and Jinbei, with Yuko Tanaka as Kei Yamai. The cast also includes Junichi Okada as Toru Kikuzawa, Yoh Yoshida as the Orphanage Director, Ryota Bando as a Journalist and Yukiya Kitamura as a Detective.

• Ami Koyae as Kotoko Kayano / Shigeo
• Fumi Nikaido as Fumiko Sone
• Kaito Sakurai as Ritsuro Kayano
• Yutaka Takenouchi as Koichi Kayano
• Koji Yakusho as Jinbe Yamai / Jinbei
• Yuko Tanaka as Kei Yamai
• Junichi Okada as Toru Kikuzawa
• Yoh Yoshida as Orphanage Director
• Ryota Bando as Journalist
• Yukiya Kitamura as Detective

Release and production context

Children Untold is a 2026 production from Japan with a listed release date of October 16, 2026. It has a runtime of 2 hours and 30 minutes and is categorized as both Drama and War. The spoken languages are Japanese, English and Korean. The production company listed is Kii no Muneyuki.

Production companies: Kii no Muneyuki

Children Untold official trailer

Watch the official trailer on YouTube

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Based on its premise and available credits, Children Untold is a postwar drama concerned with what happens to children after the conflict itself has ended. Its long runtime, multilingual presentation and ensemble cast give the film room to explore that difficult period, while the supplied synopsis keeps the specific course of the story undisclosed.

Film data:
TMDB · IMDb