Chūsei Sone (曽根 中生, Sone Chūsei, 1 October 1937 – 26 August 2014) was a Japanese film director known for his stylish and popular Roman Porno films for Nikkatsu, particularly the first two installments of the Angel Guts series. Despite a somewhat uneven career, many mainstream critics consider Sone the best of Nikkatsu's Roman Porno directors.