Shinji Imaoka (今岡信治 or いまおかしんじ, いまおかしんぢ, Imaoka Shinji) a.k.a. 羅門ナカ is a Japanese film director, screenwriter, and actor. He is one of a group of pink film directors of the 2000s known collectively as the "Seven Lucky Gods of Pink" (ピンク七福神, shichifukujin), which besides Imaoka, also includes Toshiya Ueno, Mitsuru Meike, Yūji Tajiri, Yoshitaka Kamata, Toshirō Enomoto and Rei Sakamoto.
Source: “Shinji Imaoka”, English Wikipedia (CC BY-SA 4.0), excerpt