Live-Action High School Family: Kokosei Kazoku Film Reveals Theme Song Artist, Trailer, Poster

The official website for the live-action film of Ryō Nakama‘s High School Family: Kokosei Kazoku (Kōkōsei Kazoku) manga announced the theme song artist in a new trailer on Wednesday. The trailer previews the theme song “Kore mo Seishun da” (This is Also Youth) by Yuzu.

The staff also revealed a new poster:

Viz Media and MANGA Plus are both publishing the series in English digitally, and MANGA Plus describes the story:

Spring is in the air, and Kotaro is about to begin his first year of high school. He’s full of hope and anticipation of a wonderful life at his new school, only to have his dreams crushed by…his family?! Isobe Isobee Monogatari ~ Ukiyo wa Tsuraiyo creator Ryō Nakama‘s latest series combines family and school life gags, making it feel familiar but also fresh and new. This new genre of comedy will be sure to make the grade!

The film stars (left to right in visual right):

• Yuno Nagao (live-action Golden Kamuy, 2024’s Black Jack) plays the younger sister Haruka
• Shingo Katori (Lil’ Red Riding Hood Cha-Cha, Friends: Mononoke Shima no Naki) plays the father Ichiro
• Jun Saitō (Labyrinth, live-action Let’s Go Karaoke!, Trillion Game) plays the eldest son Kōtarō
• Riisa Naka (The Girl Who Leapt Through Time, live-action Cells at Work!) plays the mother Shizuka

Tôichirô Rutô (live-action Violence Action, G Men, Ossan’s Love) is directing the film based on a script by Europe Kikaku‘s Makoto Ueda (The Tatami Galaxy, Night is Short, Walk On Girl, Penguin Highway).

The film will open in Japan on January 8, a delay from the film’s originally planned fall 2026 opening.

Nakama launched the manga in Shueisha‘s Weekly Shonen Jump magazine in September 2020 and ended the series in Weekly Shonen Jump in February 2023.  Shueisha published the 11th and final compiled book volume in July 2023. Viz Media is also publishing the manga in compiled volume form digitally.

Nakama previously published the Isobe Isobee Monogatari ~Ukiyo wa Tsurai yo~ manga in Weekly Shonen Jump from October 2013 to October 2017. The manga inspired two net anime series and a stage play.

Sources: High School Family: Kokosei Kazoku live-action film’s website, Comic Natalie