[3] In 1996 he wrote the script for the Dreamcast audio drama game Real Sound: Kaze no Regret with Kenji Eno.
[4][5] He has written the scripts for many popular Japanese television dramas, including Our Textbook, Still, Life Goes On, Matrimonial Chaos, Mother, Woman, The Best Divorce, and Quartet.
His filmography includes We Made a Beautiful Bouquet (2021), starring Masaki Suda and Kasumi Arimura.
[6] Monster premiered at the 2023 Cannes Film Festival,[7] where Sakamoto won the Best Screenplay award.
[8] In April 2016, he was appointed as a professor at the Tokyo University of the Arts's Graduate School of Film and New Media.