In 2000, he starred in Ikebukuro West Gate Park along with Tomoya Nagase, Ken Watanabe (The Last Samurai, Memoirs of a Geisha, Inception) and Tomohisa Yamashita (Nobuta wo Produce, Kurosagi, Operation Love, Code Blue).

In 2001, he starred in Strawberry on the Shortcake along with other popular young artists such as Hideaki Takizawa and Kyoko Fukada.

In October of that same year, Go (directed by Isao Yukisada), which tells the story of a Zainichi chosenjin teenager who falls in love with a Japanese girl, was officially released.

[2] Since then, Kubozuka took on projects starring in Ping Pong, Kyoki no Sakura as well as Samurai Resurrection.

He also appeared in films such as Tokyo Island,[3] Monsters Club,[4] Helter Skelter,[5] and the 2016 remake of Silence directed by Martin Scorsese.