Punk Samurai Slash Down is a 2018 Japanese period action/drama, written by Kankurô Kudô and directed by Gakuryû Ishii (formerly known as Sogo Ishii). The film is based on the novel Panku-zamurai, kirarete sôrô penned by author Kou Machida. Ishii is most notable for his Jishu eiga (self-made films) such as Charge! Hakata Gangsters (1978),