Shinji Imaoka
- Birthday: 1965-01-01
- Place of birth: Osaka, Japan
- Also know as: いまおかしんじ
Shinji Imaoka 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 Kamada, Toshirō Enomoto and Rei Sakamoto.
