Kazuo Kasahara was a Japanese screenwriter particularly known for his work in the yakuza film genre. He was born in the Nihonbashi area of Tokyo and dropped out of Nippon University. From Wikipedia
'11 Rebels,' directed by Shiraishi Kazuya, will premiere at the 37th Tokyo International Film Festival, which will conclude with Christophe Honoré's 'Marcello Mio.'
