Kōji Wakamatsu
a.k.a. Hiroshi Mukai and was a Japanese film director, cinematographer, producer and screenwriter, known for his pioneering work in the "pink film" genre. In the realm of "pink" cinema, Japanese critics have estimated that Mukai is "the only serious rival of Kōji Wakamatsu." As a producer, Mukai helped the early careers of many prominent directors, including Hisayasu Satō and Academy-Award winner Yōjirō Takita. In his career, he directed nearly 200 films and produced approximately 500.