Toshio Saeki (佐伯俊男) is a Japanese artist and mangaka born in 1945 famous for his paintings and drawing focusing on erotica, violence, and perversion. He has published numerous book and had gallery shows around the world. It has been suggested that his highly original erotic creations have been influential on some of Japan's most well known contemporary artists including Aida Makoto and Takashi Murakami. Saeki's paintings often feature men and women as well as demons, animals, corpses, and other creatures in various erotic or violent settings.
His work has received warnings from the Japanese government, though it has never been officially banned. His works are collected avidly by erotic art fans in Japan, America, France, and other parts of the world. Saeki has said that he enjoys using his art to shock people and he doesn't really involve himself in the extreme activity of his best known works.