One Son (2018 Film)
One Son (Japanese: 一人の息子, Hepburn: Hitori no Musuko) is a 2018 Japanese drama film directed by Kenji Tani. The film, which has a runtime of 90 minutes, premiered at the Takasaki Film Festival on April 7, 2018, before its general release in Japan on July 7, 2018.

Plot
The narrative centers on Itsuki Yamauchi, played by Ryoma Baba, who receives news that his father has collapsed. Despite a strained relationship, Itsuki remains deeply affected by his father's condition. Parallel to this, the story follows Ayumu Kurata, portrayed by Yuki Tamaki, a man working for a moving company who has grown up without a father. The lives of these two men, who come from vastly different backgrounds, eventually intersect through a single document.
Cast
The film features an ensemble cast including:
- Ryoma Baba as Itsuki Yamauchi
- Yuki Tamaki as Ayumu Kurata
- Ayame Misaki as Kaori Higuchi
- Keiko Takeshita as Ikuko Sasaki
- Tomohisa Yuge as Koji Niiyama
- Atsushi Shinohara as Seitaro Mitamura
- Masakazu Nemoto as Yosuke Ichimiya
- Shota Takasaki as Abe
- Anam Sekiguchi as Sasayama
- Chisaki Miki as Aya Shinohara









