His eldest son Daisuke Tengan is also a script writer and film director, and worked on the screenplays to Imamura's films The Eel (1997), Dr. Akagi (1998), Warm Water Under a Red Bridge (2001) and 11'09"01 September 11 (2002).
Putra sulungnya Daisuke Tengan juga menjadi penulis naskah dan sutradara film, dan bekerja pada permainan latar di film Imamura The Eel (1997), Dr. Akagi (1998), Warm Water Under a Red Bridge (2001) dan 11'9''01 September 11 (2002).